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Journal articles on the topic 'Aromatic molecules; Benzaldehyde'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Alata, I., R. Omidyan, C. Dedonder-Lardeux, M. Broquier, and C. Jouvet. "Electronically excited states of protonated aromatic molecules: benzaldehyde." Physical Chemistry Chemical Physics 11, no. 48 (2009): 11479. http://dx.doi.org/10.1039/b913422k.

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2

Bucko, Mihael, Uros Lacnjevac, and Jelena Bajat. "The influence of substituted aromatic aldehydes on Zn-Mn alloy electrodeposition." Journal of the Serbian Chemical Society 78, no. 10 (2013): 1569–81. http://dx.doi.org/10.2298/jsc130118025b.

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Additives are necessary in the electrodeposition of Zn-Mn alloys at high current density, in order to reduce hydrogen evolution reaction and prevent dendrite formation. The influence of two aromatic aldehydes, 4-hydroxy-benzaldehyde and 3,4-dimethoxy-benzaldehyde, as the additives in Zn-Mn plating electrolyte, is examined in this work. The coatings characterization by scanning electron microscopy and X-ray energy dispersive spectroscopy, as well as the examination of additives effect by electrochemical methods, indicate a complex involvement of additive molecules in hydrogen evolution, as well

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3

Kansiz, Sevgi, Digdem Tatlidil, Necmi Dege, Feyzi Alkim Aktas, Samir Osman Mohammed Al-Asbahy, and Aysen Alaman Agar. "Crystal structure and molecular docking study of (E)-2-{[(E)-2-hydroxy-5-methylbenzylidene]hydrazinylidene}-1,2-diphenylethan-1-one." Acta Crystallographica Section E Crystallographic Communications 77, no. 6 (2021): 658–62. http://dx.doi.org/10.1107/s2056989021005442.

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The title compound, C22H18N2O2, is a Schiff base that exists in the phenol–imine tautomeric form and adopts an E configuration with respect to the C=N bond. The molecular structure is stabilized by an O—H...N hydrogen bond, forming an S(6) ring motif. In the crystal, pairs of C—H...O hydrogen bonds link the molecules to form inversion dimers. Weak π–π stacking interactions along the a-axis direction provide additional stabilization of the crystal structure. The molecule is non-planar, the aromatic ring of the benzaldehyde residue being nearly perpendicular to the phenyl and 4-methylphenol ring

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4

Oliveira, Gabriela Porto de, Leandro Bresolin, Darlene Correia Flores, Renan Lira de Farias, and Adriano Bof de Oliveira. "Crystal structure of (2E)-3-[4-(dimethylamino)phenyl]-1-(thiophen-2-yl)prop-2-en-1-one." Acta Crystallographica Section E Crystallographic Communications 73, no. 4 (2017): 476–80. http://dx.doi.org/10.1107/s2056989017003437.

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The equimolar reaction between 4-(dimethylamino)benzaldehyde and 2-acetylthiophene in basic ethanolic solution yields the title compound, C15H15NOS, whose molecular structure matches the asymmetric unit. The molecule is not planar, the dihedral angle between the aromatic and the thiophene rings being 11.4 (2)°. In the crystal, molecules are linked by C—H...O and weak C—H...S interactions along [100], formingR22(8) rings, and by weak C—H...O interactions along [010], forming chains with aC(6) graph-set motif. In addition, molecules are connected into centrosymmetric dimers by weak C—H...π inter

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5

Theodoropoulou, Maria A., Nikolaos F. Nikitas, and Christoforos G. Kokotos. "Aldehydes as powerful initiators for photochemical transformations." Beilstein Journal of Organic Chemistry 16 (April 23, 2020): 833–57. http://dx.doi.org/10.3762/bjoc.16.76.

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Photochemistry, the use of light to promote organic transformations, has been known for more than a century but only recently has revolutionized the way modern chemists are thinking. Except from transition metal-based complexes, small organic molecules have been introduced as catalysts or initiators. In this review, we summarize the potential that (aromatic or aliphatic) aldehydes have as photoinitiators. The photophysical properties and photoreactivity of benzaldehyde are initially provided, followed by applications of aldehydes as initiators for polymerization reactions. Finally, the applica

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Rocco, Dalila, Catherine E. Housecroft, and Edwin C. Constable. "Synthesis of Terpyridines: Simple Reactions—What Could Possibly Go Wrong?" Molecules 24, no. 9 (2019): 1799. http://dx.doi.org/10.3390/molecules24091799.

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The preparation of 24-functionalized 12,22:26,32-terpyridines (4′-functionalized 3,2:6′,3″-terpyridines) by the reaction of three 4-alkoxybenzaldehydes with 3-acetylpyridine and ammonia was investigated; under identical reaction conditions, two (R =nC4H9, C2H5) gave the expected products whereas a third (R = nC3H7) gave only a cyclohexanol derivative derived from the condensation of three molecules of 3-acetylpyridine with two of 4-(n-propoxy)benzaldehyde. A comprehensive survey of “unexpected” products from reactions of ArCOCH3 derivatives with aromatic aldehydes is presented. Three different

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7

Girardi, Leury G. J., Michele Morsch, Ana E. Oliveira, Valdir Cechinel-Filho, and Clóvis Antonio Rodrigues. "Separation of Bioactive Biflavonoids from Rheedia gardneriana Using Chitosan Modified with Benzaldehyde." Zeitschrift für Naturforschung C 60, no. 5-6 (2005): 408–10. http://dx.doi.org/10.1515/znc-2005-5-607.

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This paper shows the influence of benzenic groups on the chitosan surface for the separation of bioactive biflavonoids from Rheedia gardneriana leaves. The yield of the biflavonoids using chitin modified with benzaldehyde (CH-Bz) as adsorbent in column chromatography was higher than that achieved with silica gel and chitosan. The presence of benzenic groups decreases the polarity of chitosan and consequently the interaction of hydrogen bonding between phenolic hydroxyl (OH) of biflavonoids and amine groups of the adsorbent. Therefore, the separation of these compounds appears to be the result

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8

Arshad, Uzma, Sibtain Ahmed, Nusrat Shafiq, et al. "Structure-Based Designing, Solvent Less Synthesis of 1,2,3,4-Tetrahydropyrimidine-5-carboxylate Derivatives: A Combined In Vitro and In Silico Screening Approach." Molecules 26, no. 15 (2021): 4424. http://dx.doi.org/10.3390/molecules26154424.

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Objective: In this study, small molecules possessing tetrahydropyrimidine derivatives have been synthesized having halogenated benzyl derivatives and carboxylate linkage. As previously reported, FDA approved halogenated pyrimidine derivatives prompted us to synthesize novel compounds in order to evaluate their biological potential. Methodology: Eight pyrimidine derivatives have been synthesized from ethyl acetoacetate, secondary amine, aromatic benzaldehyde by adding catalytic amount of CuCl2·2H2O via solvent less Grindstone multicomponent reagent method. Molecular structure reactivity and vir

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9

Guerrero-Villalobos, Liliana Rocio, and FabiĂˇn Orozco LĂłpez. "RATIONAL DESIGN, SYNTHESIS AND CHARACTERIZATION OF HYBRID MOLECULES WITH PYRAZOLINE, PYRIMIDINE AND THIAZOLIDINE NUCLEI AS POTENTIAL ANTIBACTERIAL AGENTS." CBU International Conference Proceedings 5 (September 24, 2017): 1096–103. http://dx.doi.org/10.12955/cbup.v5.1077.

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In this paper, a set of computational tools were used to design and evaluate molecular structures resulting from the combination of the biologically interesting pyrazoline, aminopyrimidine and thiazolidine nuclei (molecular modification) to obtain new bioactive compounds. Key physicochemical properties were calculated (absorption, distribution, metabolism, excretion and toxicity), to determine the bioavailability of the designed compounds and to perform a preselection of 12 derivatives which were then optimized and studied by molecular docking with the receptor PBP3 (4bjp) from Escherichia col

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10

Panoutsopoulos, Georgios I., and Christine Beedham. "Kinetics and specificity of guinea pig liver aldehyde oxidase and bovine milk xanthine oxidase towards substituted benzaldehydes." Acta Biochimica Polonica 51, no. 3 (2004): 649–63. http://dx.doi.org/10.18388/abp.2004_3550.

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Molybdenum-containing enzymes, aldehyde oxidase and xanthine oxidase, are important in the oxidation of N-heterocyclic xenobiotics. However, the role of these enzymes in the oxidation of drug-derived aldehydes has not been established. The present investigation describes the interaction of eleven structurally related benzaldehydes with guinea pig liver aldehyde oxidase and bovine milk xanthine oxidase, since they have similar substrate specificity to human molybdenum hydroxylases. The compounds under test included mono-hydroxy and mono-methoxy benzaldehydes as well as 3,4-dihydroxy-, 3-hydroxy

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11

Zhang, Zhenfeng, and Dejun Chen. "Hydrazone–aromatic interaction: the vital role in molecular self-assembly of benzaldehyde hydrazones." CrystEngComm 22, no. 10 (2020): 1691–94. http://dx.doi.org/10.1039/c9ce01978b.

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A scarce NNC⋯π interaction, which plays an essential role in defining the crystal packing patterns, has been found widespread in benzaldehyde (cyanoacetyl)hydrazones, and is rationalized by density functional theory calculations.

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12

Fiorentino, Gabriella, Raffaele Cannio, Mosè Rossi, and Simonetta Bartolucci. "Transcriptional Regulation of the Gene Encoding an Alcohol Dehydrogenase in the Archaeon Sulfolobus solfataricus Involves Multiple Factors and Control Elements." Journal of Bacteriology 185, no. 13 (2003): 3926–34. http://dx.doi.org/10.1128/jb.185.13.3926-3934.2003.

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ABSTRACT A transcriptionally active region has been identified in the 5′ flanking region of the alcohol dehydrogenase gene of the crenarchaeon Sulfolobus solfataricus through the evaluation of the activity of putative transcriptional regulators and the role of the region upstream of the gene under specific metabolic circumstances. Electrophoretic mobility shift assays with crude extracts revealed protein complexes that most likely contain TATA box-associated factors. When the TATA element was deleted from the region, binding sites for both DNA binding proteins, such as the small chromatin stru

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13

Zhang, Chen, Ming Tang, Bing Sun, Weizhou Wang, Ying Yi, and Fang-Lin Zhang. "A three-step sequence strategy for facile construction of donor–acceptor type molecules: triphenylamine-substituted acenes." Canadian Journal of Chemistry 98, no. 1 (2020): 40–48. http://dx.doi.org/10.1139/cjc-2019-0254.

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A new synthetic strategy was successfully developed for highly efficient construction of triphenylamine-substituted polycyclic aromatic hydrocarbons (PAHs), including anthracenes, tetraphenes, pentaphenes, and trinaphthylene. These molecules exhibited special structural characteristics, including donor–acceptor–donor (D–A–D) and donor–acceptor (D–A). Diverse aryl iodides coupled well with chlorinated 2-methyl benzaldehydes via a transient ligand-directed C–H bond arylation strategy to furnish various PAH precursors. The subsequent palladium-catalyzed Suzuki cross-couplings with 4-(diphenylamin

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14

Zhang, Zi-Yang, Shou-Ri Sheng, Xiao-Lan Zhang, Yang Pan, and Xiao-Ling Liu. "New poly(aryl ether ketone)s containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups." High Performance Polymers 32, no. 7 (2020): 753–60. http://dx.doi.org/10.1177/0954008319901148.

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4-(4-Diphenylphosphino)phenyl-2,6-bis(4-hydroxyphenyl)pyridine, as a new bisphenol monomer, was prepared from 4-(diphenylphosphino)benzaldehyde and 4-hydroxyacetophenone and used in the preparation of several aromatic poly(ether ketone)s (PEKs) containing 2,6-diphenylpyridyl units and diphenylphosphinophenyl pendant groups via a nucleophilic aromatic substitution polycondensation with difluorinated aromatic ketones. The polycondensation proceeded quantitatively in tetramethylene sulfone in the presence of anhydrous potassium carbonate and afforded the polymers with high molecular weights. The

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15

Morales, Raúl G. E., Victor Vargas та Carlos Hernández. "Bridge effect in charge transfer absorption bands ofpara-substitutedβ-nitrostyrenes". Spectroscopy 13, № 3 (1997): 201–6. http://dx.doi.org/10.1155/1997/701640.

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Charge transfer electronic transitions in a series ofpara-substitutedβ-nitro-styrenes are analyzed in order to characterize theπ-conduction channel between the electron-donor substituents and the NO2electron-acceptor group, particularly the bridge effect of the olefinic molecular structure.Absorption bands assignment of theπ → π* electronic transitions in the near ultraviolet spectral region is carried out from an experimental and theoretical point of view. The photo-induced charge transfer spectral bands of these aromatic compounds follow the same pattern as nitrobenzene, benzaldehyde and ace

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16

Sahoo, Biswa Mohan, Bimal Krishna Banik, Mazaharunnisa, Naidu Srinivasa Rao, and Bodapati Raju. "Microwave Assisted Green Synthesis of Benzimidazole Derivatives and Evaluation of Their Anticonvulsant Activity." Current Microwave Chemistry 6, no. 1 (2019): 23–29. http://dx.doi.org/10.2174/2213335606666190429124745.

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Background: Benzimidazole is the fused heterocyclic aromatic compound. It is an essential pharmacophore and privileged structure for the development of new drug molecules. These are bioactive molecules present in various anthelmintic drugs such as albendazole, mebendazole, parbendazole, triclabendazole etc. Methods: Benzimidazole derivatives are synthesized by reaction between orthophenylene diamine and anthranillic acid followed by acetylation in the presence of acetic anhydride. Finally, the acetylated products undergo Claisen-Schimdt condensation with various substituted benzaldehydes to pr

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17

Pelttari, Eila, Eliisa Karhumäki, Jane Langshaw, Hannu Peräkylä, and Hannu Elo. "Antimicrobial Properties of Substituted Salicylaldehydes and Related Compounds." Zeitschrift für Naturforschung C 62, no. 7-8 (2007): 487–97. http://dx.doi.org/10.1515/znc-2007-7-806.

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A systematic survey of the antimicrobial properties of substituted salicylaldehydes and some related aromatic aldehydes is reported. A total of 23 different compounds, each at four different concentrations, were studied using a panel of seven microbes (Aspergillus niger, Bacillus cereus, Candida albicans, Escherichia coli, Pseudomonas aeruginosa, Saccharomyces cerevisiae and Staphylococcus epidermidis) and employing the paper disc agar diffusion method. Several aldehydes, most notably halogenated, nitro-substituted and hydroxylated salicylaldehydes, displayed highly potent activity against the

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18

Sethuraman, Anand, Danny E. Akin, Jason G. Eisele, and Karl-Erik L. Eriksson. "Effect of aromatic compounds on growth and ligninolytic enzyme production of two white rot fungi Ceriporiopsis subvermispora and Cyathus stercoreus." Canadian Journal of Microbiology 44, no. 9 (1998): 872–85. http://dx.doi.org/10.1139/w98-077.

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Seven benzoic acid, ten cinnamic acid, and five benzaldehyde derivatives were tested for their effects on hyphal growth and production of laccase and manganese peroxidase by Ceriporiopsis subvermispora FP 90031-sp and Cyathus stercoreus ATCC 36910. Derivatives tested included phenolic compounds and their corresponding unsubstituted and O-methylated derivatives. Benzaldehyde derivatives were more toxic to both fungi than the corresponding benzoic and cinnamic acid derivatives. Hyphal growth was generally increased at a low concentration of 1 mM, while higher concentrations of 5-10 mM mostly res

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19

Jones, Rheinallt M., Lauren S. Collier, Ellen L. Neidle, and Peter A. Williams. "areABC Genes Determine the Catabolism of Aryl Esters in Acinetobacter sp. Strain ADP1." Journal of Bacteriology 181, no. 15 (1999): 4568–75. http://dx.doi.org/10.1128/jb.181.15.4568-4575.1999.

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ABSTRACT Acinetobacter sp. strain ADP1 is able to grow on a range of esters of aromatic alcohols, converting them to the corresponding aromatic carboxylic acids by the sequential action of three inducible enzymes: an areA-encoded esterase, anareB-encoded benzyl alcohol dehydrogenase, and anareC-encoded benzaldehyde dehydrogenase. Theare genes, adjacent to each other on the chromosome and transcribed in the order areCBA, were located 3.5 kbp upstream of benK. benK, encoding a permease implicated in benzoate uptake, is at one end of the ben-cat supraoperonic cluster for benzoate catabolism by th

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20

Pietrzak, Marek, and Beata Jędrzejewska. "Aromatic Amines in Organic Synthesis. Part II. p-Aminocinnamaldehydes." Molecules 26, no. 14 (2021): 4360. http://dx.doi.org/10.3390/molecules26144360.

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Ten derivatives of p-aminocinnamic aldehydes were prepared from the reaction of either aromatic amines with dimethylaminoacrolein or benzaldehydes with acetaldehyde. Their chemical structure and purity were verified by 1H NMR, 13C NMR and IR spectroscopic methods. We found that the synthesis applying dimethylaminoacrolein as the reagent gets better yields than the one based on the reaction with acetaldehyde. The yields of the cinnamic aldehydes varied according to the type of the amino group and the number and position of the substituents. The basic spectroscopic properties of the p-aminocinna

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21

Fiorentino, Gabriella, Raffaele Ronca, Raffaele Cannio, Mosè Rossi, and Simonetta Bartolucci. "MarR-Like Transcriptional Regulator Involved in Detoxification of Aromatic Compounds in Sulfolobus solfataricus." Journal of Bacteriology 189, no. 20 (2007): 7351–60. http://dx.doi.org/10.1128/jb.00885-07.

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ABSTRACT A DNA binding protein, BldR, was identified in the crenarchaeon Sulfolobus solfataricus as a protein 5- to 10-fold more abundant in cells grown in the presence of toxic aldehydes; it binds to regulatory sequences located upstream of an alcohol dehydrogenase gene (Sso2536). BldR is homologous to bacterial representatives of the MarR (multiple antibiotic resistance) family of transcriptional regulators that mediate response to multiple environmental stresses. Transcriptional analysis revealed that the bldR gene was transcribed in a bicistronic unit composed of the genes encoding the tra

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22

Fu, Yun, Sufeng Zhou, Youxun Liu, Yingli Yang, Xingzhi Sun та Changzheng Li. "The Cytotoxicity of Benzaldehyde Nitrogen Mustard-2-Pyridine Carboxylic Acid Hydrazone Being Involved in Topoisomerase IIαInhibition". BioMed Research International 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/527042.

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The antitumor property of iron chelators and aromatic nitrogen mustard derivatives has been well documented. Combination of the two pharmacophores in one molecule in drug designation is worth to be explored. We reported previously the syntheses and preliminary cytotoxicity evaluation of benzaldehyde nitrogen mustard pyridine carboxyl acid hydrazones (BNMPH) as extended study, more tumor cell lines (IC50for HepG2: 26.1 ± 3.5 μM , HCT-116: 57.5 ± 5.3 μM, K562: 48.2 ± 4.0 μM, and PC-12: 19.4 ± 2.2 μM) were used to investigate its cytotoxicity and potential mechanism.In vitroexperimental data show

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23

Ying, Xiangxian, Yifang Wang, Bin Xiong та ін. "Characterization of an Allylic/Benzyl Alcohol Dehydrogenase from Yokenella sp. Strain WZY002, an Organism Potentially Useful for the Synthesis of α,β-Unsaturated Alcohols from Allylic Aldehydes and Ketones". Applied and Environmental Microbiology 80, № 8 (2014): 2399–409. http://dx.doi.org/10.1128/aem.03980-13.

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ABSTRACTA novel whole-cell biocatalyst with high allylic alcohol-oxidizing activities was screened and identified asYokenellasp. WZY002, which chemoselectively reduced the C=O bond of allylic aldehydes/ketones to the corresponding α,β-unsaturated alcohols at 30°C and pH 8.0. The strain also had the capacity of stereoselectively reducing aromatic ketones to (S)-enantioselective alcohols. The enzyme responsible for the predominant allylic/benzyl alcohol dehydrogenase activity was purified to homogeneity and designated YsADH (alcohol dehydrogenase fromYokenellasp.), which had a calculated subunit

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24

Perju, Elena, and Luminita Marin. "Mesomorphic Behavior of Symmetric Azomethine Dimers Containing Different Chromophore Groups." Molecules 26, no. 8 (2021): 2183. http://dx.doi.org/10.3390/molecules26082183.

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A series of new azomethine dimers was synthesized by the condensation reaction of flexible bis-benzaldehydes with four aromatic amines containing phenyl, naphthyl, anthracene and pyrene groups. Their right structure was confirmed by FTIR and 1H-NMR spectroscopy and their thermal properties were investigated by thermogravimetric analysis, differential scanning calorimetry and polarized light optical microscopy. A view on their photophysical behavior was gained by UV-vis and photoluminescence spectroscopy. The dimers containing pyrene and anthracene presented liquid crystalline behavior, while t

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25

Gaspar, Daniela Pinheiro, Gilson Celso Albuquerque Chagas Junior, Eloisa Helena de Aguiar Andrade, et al. "How Climatic Seasons of the Amazon Biome Affect the Aromatic and Bioactive Profiles of Fermented and Dried Cocoa Beans?" Molecules 26, no. 13 (2021): 3759. http://dx.doi.org/10.3390/molecules26133759.

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In addition to the vast diversity of fauna and flora, the Brazilian Amazon has different climatic periods characterized by periods with greater and lesser rainfall. The main objective of this research was to verify the influence of climatic seasons in the Brazilian Amazon (northeast of Pará state) concerning the aromatic and bioactive profiles of fermented and dried cocoa seeds. About 200 kg of seeds was fermented using specific protocols of local producers. Physicochemical analyzes (total titratable acidity, pH, total phenolic compounds, quantification of monomeric phenolics and methylxanthin

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26

Brasquet, Catherine, Etienne Subrenat, and Pierre Le Cloirec. "Selective adsorption on fibrous activated carbon of organics from aqueous solution: correlation between adsorption and molecular structure." Water Science and Technology 35, no. 7 (1997): 251–59. http://dx.doi.org/10.2166/wst.1997.0284.

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In industrial processes, granular activated carbon (GAC) is generally used to remove pollutants from wastewater. Recently, a new adsorbant has been explored, fibrous activated carbon (FAC). Experiments were carried out with two FACs having different specific surface areas (1500 and 1300 m2.g−1) and pore-size distributions to study adsorption of various organic compounds from aqueous solution. Results were compared with adsorption onto one GAC with a specific surface area of about 1000 m2.g−1. Classic models were applied and kinetic constants were computed. In most cases, FAC with the higher sp

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27

Hamid, Sharifah Bee Abd, Mariom Zamila Shilpy, and Md Eaqub Ali. "Green Catalytic Approach for the Synthesis of Platform Chemicals from Palm Tree Lignin." Advanced Materials Research 925 (April 2014): 62–66. http://dx.doi.org/10.4028/www.scientific.net/amr.925.62.

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Lignin is the second most abundant naturally occurring macromolecule found in plant cell-wall, vascular components and woody stems. It is the largest renewable source of aromatic biopolymer. However, lignin is recalcitrant to be broken down by most chemicals. This is because of its complicated heterogeneous molecular structure. However, lignin depolymerization has huge potentials for the synthesis of a number of useful chemicals, perfumes and pharmaceuticals and toiletries. The oxidation products of lignin are important precursors for pulp/paper and food industries, synthetic thin films. Vanil

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28

Arif, Mubeen, Furukh Jabeen, Aamer Saeed, Irfan Zia Qureshi, and Nadia Mushtaq. "A new class of potential antidiabetic acetohydrazides: Synthesis, in vivo antidiabetic activity and molecular docking studies." Bangladesh Journal of Pharmacology 12, no. 3 (2017): 319. http://dx.doi.org/10.3329/bjp.v12i3.31428.

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<p class="Abstract">Two new pharmacologically active series of tetrazolopyridine-acetohydrazide conjugates [9 (a-n), 10 (a-n)] were synthesized by reacting a variety of suitably substituted benzaldehydes and isomeric 2-(5-(pyridin-3/4-yl)-2H-tetrazol-2-yl)acetohydrazides (7, 8). The synthesized compounds were analyzed through FTIR, <sup>1</sup>H NMR, <sup>13</sup>C NMR and elemental techniques. These acetohydrazides were screened for their in vivo antidiabetic activity and molecular docking studies. An excellent agreement was obtained as the best docked poses show

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Dadashipour, Mohammad, Yuko Ishida, Kazunori Yamamoto, and Yasuhisa Asano. "Discovery and molecular and biocatalytic properties of hydroxynitrile lyase from an invasive millipede,Chamberlinius hualienensis." Proceedings of the National Academy of Sciences 112, no. 34 (2015): 10605–10. http://dx.doi.org/10.1073/pnas.1508311112.

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Hydroxynitrile lyase (HNL) catalyzes the degradation of cyanohydrins and causes the release of hydrogen cyanide (cyanogenesis). HNL can enantioselectively produce cyanohydrins, which are valuable building blocks for the synthesis of fine chemicals and pharmaceuticals, and is used as an important biocatalyst in industrial biotechnology. Currently, HNLs are isolated from plants and bacteria. Because industrial biotechnology requires more efficient and stable enzymes for sustainable development, we must continuously explore other potential enzyme sources for the desired HNLs. Despite the abundanc

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Yuan, Xi, Xiaoyuan Chen, Muhammad Safiullah Virk, Yinglun Ma, and Fusheng Chen. "Effects of Various Rice-Based Raw Materials on Enhancement of Volatile Aromatic Compounds in Monascus Vinegar." Molecules 26, no. 3 (2021): 687. http://dx.doi.org/10.3390/molecules26030687.

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Monascus vinegar (MV), during whose brewing process Monascus spp. and polished rice (PR) are normally used as the starter and the raw material, respectively, is one of the traditional vinegars in China. In this study, the effects of three raw materials, including PR, unhusked rice (UR), and germinated UR (GR), on MV volatile compounds have been investigated. The results revealed that MV of GR (GMV), and its intermediate Monascus wine (GMW), exhibited the highest amount of aroma, not only in the concentrations but also in the varieties of the aromatic compounds mainly contributing to the final

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31

Ferreira, Patricia, Milagros Medina, Francisco Guillén, María Jesús Martínez, Willem J. H. Van Berkel, and Ángel T. Martínez. "Spectral and catalytic properties of aryl-alcohol oxidase, a fungal flavoenzyme acting on polyunsaturated alcohols." Biochemical Journal 389, no. 3 (2005): 731–38. http://dx.doi.org/10.1042/bj20041903.

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Spectral and catalytic properties of the flavoenzyme AAO (aryl-alcohol oxidase) from Pleurotus eryngii were investigated using recombinant enzyme. Unlike most flavoprotein oxidases, AAO does not thermodynamically stabilize a flavin semiquinone radical and forms no sulphite adduct. AAO catalyses the oxidative dehydrogenation of a wide range of unsaturated primary alcohols with hydrogen peroxide production. This differentiates the enzyme from VAO (vanillyl-alcohol oxidase), which is specific for phenolic compounds. Moreover, AAO is optimally active in the pH range of 5–6, whereas VAO has an opti

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Silva, Pedro J. "New insights into the mechanism of Schiff base synthesis from aromatic amines in the absence of acid catalyst or polar solvents." PeerJ Organic Chemistry 2 (December 15, 2020): e4. http://dx.doi.org/10.7717/peerj-ochem.4.

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Extensive computational studies of the imine synthesis from amines and aldehydes in water have shown that the large-scale structure of water is needed to afford appropriate charge delocalization and enable sufficient transition state stabilization. These insights cannot, however, be applied to the understanding of the reaction pathway in apolar solvents due their inability to form extensive hydrogen-bonding networks. In this work, we perform the first computational studies of this reaction in nonpolar conditions. This density-functional study of the reaction of benzaldehyde with four closely r

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33

Uthoff, Stefan, and Alexander Steinbüchel. "Purification and Characterization of an NAD+-Dependent XylB-Like Aryl Alcohol Dehydrogenase Identified in Acinetobacter baylyi ADP1." Applied and Environmental Microbiology 78, no. 24 (2012): 8743–52. http://dx.doi.org/10.1128/aem.02224-12.

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ABSTRACTThe genexylBADP1fromAcinetobacter baylyiADP1 (gene annotation number ACIAD1578), coding for a putative aryl alcohol dehydrogenase, was heterologously expressed inEscherichia coliBL21(DE3). The respective aryl alcohol dehydrogenase was purified by fast protein liquid chromatography to apparent electrophoretic homogeneity. The predicted molecular weight of 39,500 per subunit was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. According to the nativeMwas determined by gel filtration, the enzyme forms dimers and therefore seems to be XylB related. The enzyme showed

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Fracassetti, Bottelli, Corona, Foschino, and Vigentini. "Innovative Alcoholic Drinks Obtained by Co-Fermenting Grape Must and Fruit Juice." Metabolites 9, no. 5 (2019): 86. http://dx.doi.org/10.3390/metabo9050086.

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In this study, Cabernet Sauvignon and Chardonnay musts, and fruit juices from cherry, kiwi, peach, and strawberry were co-fermented with Saccharomyces cerevisiae EC1118 and Torulaspora delbrueckii UMY196 at two different proportions (80:20 (v/v) and 60:40 (v/v)). The most pleasant fruit-based drink was obtained with Cabernet Sauvignon must and kiwi juice in a proportion of 60:40 and fermented with T. delbrueckii. This beverage was produced in higher volume to simulate a scale-up, and the aromatic profile, sensory description, and consumer acceptability were determined. The most powerful odoran

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Dammene Debbih, Ouafa, Assia Sid, Rafika Bouchene, Sofiane Bouacida, Wissam Mazouz, and Noureddine Gherraf. "Two hydrazones derived from 1-aryl-3-(p-substituted phenyl)prop-2-en-1-one: synthesis, crystal structure, Hirshfeld surface analysis andin vitrobiological properties." Acta Crystallographica Section C Structural Chemistry 74, no. 6 (2018): 703–14. http://dx.doi.org/10.1107/s2053229618006812.

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Two chalcones were synthesized by the aldolic condensation of enolizable aromatic ketones with substituted benzaldehydes under Claisen–Schmidt reaction conditions and then treated with 2,4-dinitrophenylhydrazine to yield their corresponding hydrazones. The two (E,Z)-2,4-dinitrophenylhydrazone structures, namely (Z)-1-(2,4-dinitrophenyl)-2-[(E)-3-(4-methylphenyl)-1-phenylallylidene]hydrazine, C22H18N4O4, (H1), and (Z)-1-[(E)-3-(4-chlorophenyl)-1-(naphthalen-1-yl)allylidene]-2-(2,4-dinitrophenyl)hydrazine, C25H17ClN4O4, (H2), were isolated by recrystallization and characterized by FT–IR, UV–Vis,

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Zaytsev, Alexander, Abigail R. Koss, Martin Breitenlechner, et al. "Mechanistic study of the formation of ring-retaining and ring-opening products from the oxidation of aromatic compounds under urban atmospheric conditions." Atmospheric Chemistry and Physics 19, no. 23 (2019): 15117–29. http://dx.doi.org/10.5194/acp-19-15117-2019.

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Abstract. Aromatic hydrocarbons make up a large fraction of anthropogenic volatile organic compounds and contribute significantly to the production of tropospheric ozone and secondary organic aerosol (SOA). Four toluene and four 1,2,4-trimethylbenzene (1,2,4-TMB) photooxidation experiments were performed in an environmental chamber under relevant polluted conditions (NOx∼10 ppb). An extensive suite of instrumentation including two proton-transfer-reaction mass spectrometers (PTR-MS) and two chemical ionisation mass spectrometers (NH4+ CIMS and I− CIMS) allowed for quantification of reactive ca

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Alduhaish, Osamah, Syed Farooq Adil, Mohamed E. Assal, et al. "Synthesis and Characterization of CoxOy–MnCO3 and CoxOy–Mn2O3 Catalysts: A Comparative Catalytic Assessment Towards the Aerial Oxidation of Various Kinds of Alcohols." Processes 8, no. 8 (2020): 910. http://dx.doi.org/10.3390/pr8080910.

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CoxOy–manganese carbonate (X%)(CoxOy–MnCO3 catalysts (X = 1–7)) were synthesized via a straightforward co-precipitation strategy followed by calcination at 300 °C. Upon calcination at 500 °C, these were transformed to CoxOy–dimanganese trioxide i.e., (X%)CoxOy–Mn2O3. A relative catalytic evaluation was conducted to compare the catalytic efficiency of the two prepared catalysts for aerial oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) using O2 molecule as a clean oxidant without utilizing any additives or alkalis. Amongst the different percentages of doping with CoxOy (0–7% wt./wt.) o

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Venmathi Maran, Balu Alagar, Dawglas Josmeh, Jen Kit Tan, Yoong Soon Yong, and Muhammad Dawood Shah. "Efficacy of the Aqueous Extract of Azadirachta indica Against the Marine Parasitic Leech and Its Phytochemical Profiling." Molecules 26, no. 7 (2021): 1908. http://dx.doi.org/10.3390/molecules26071908.

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Zeylanicobdella arugamensis (Hirudinea), a marine parasitic leech, not only resulted in the mortality of the host fish (Groupers) but also caused economic losses. The current study aimed to elucidate the antiparasitic efficacy of the aqueous extract of the Azadirachta indica leaves against Z. arugamensis and to profile the composition via LC-Q Exactive HF Orbitrap mass spectrometry. Different concentrations (25, 50 and 100 mg/mL) of A. indica extract were prepared and tested on the parasitic leeches. The total mortality of leeches was noticed with an exposure to the A. indica aqueous extract.

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Pelttari, Eila, Markku Lehtinen, and Hannu Elo. "Substituted Salicylaldehydes as Potential Antimicrobial Drugs: Minimal Inhibitory and Microbicidal Concentrations." Zeitschrift für Naturforschung C 66, no. 11-12 (2011): 571–80. http://dx.doi.org/10.1515/znc-2011-11-1206.

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Substituted salicylaldehydes are potent antibacterial and antifungal agents and may have chemotherapeutic potential. In the clinical setting, the minimal inhibitory concentration (MIC) as well as the minimal bactericidal and fungicidal concentrations (MBC and MFC, respectively) are of fundamental interest. Therefore, we have now, using a panel of fi ve microbial species (Bacillus cereus, Candida albicans, Escherichia coli, Saccharomyces cerevisiae, and Staphylococcus aureus), determined the MIC and MBC/MFC values of a total of 22 aromatic aldehydes, including 19 substituted salicylaldehydes an

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El-hashash, Maher A., Amira T. Ali, Rasha A. Hussein, and Wael M. El-Sayed. "Synthesis and Reactivity of 6,8-Dibromo-2-ethyl-4H-benzo[d][1,3]oxazin-4-one Towards Nucleophiles and Electrophiles and Their Anticancer Activity." Anti-Cancer Agents in Medicinal Chemistry 19, no. 4 (2019): 538–45. http://dx.doi.org/10.2174/1871520619666190201145221.

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Background: The genetic heterogeneity of tumor cells and the development of therapy-resistant cancer cells in addition to the high cost necessitate the continuous development of novel targeted therapies. Methods: In this regard, 14 novel benzoxazinone derivatives were synthesized and examined for anticancer activity against two human epithelial cancer cell lines; breast MCF-7 and liver HepG2 cells. 6,8-Dibromo-2- ethyl-4H-benzo[d][1,3]oxazin-4-one was subjected to react with nitrogen nucleophiles to afford quinazolinone derivatives and other related moieties (3-12). Benzoxazinone 2 responds to

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Jivani, Amita J., Khushal M. Kapadiya та Ranjan C. Khunt. "Miscellaneous Passerini Reaction for α-Acyloxy Carboxamide: Synthesis and Process Optimization Study". Letters in Organic Chemistry 18 (25 січня 2021). http://dx.doi.org/10.2174/1570178618666210125161922.

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: An accelerating effect of “Phase Transfer Catalyst” as additive was exposed for the Passerini three-component reactions and the influence on the reaction rate was studied concerning direct involvement of reactant molecules. The most flexible reaction for the rapid formation of diverse “α-acyloxycarboxamides” using passerini reaction involved multicomponent reactions using miscellaneous 2-(prop-2-ynyloxy)benzaldehyde with various aromatic acid and slightly non-polar fragment i.e. 2-isocyano-2,3,3-trimethylbutane and the representative molecule was characterized with resepct to DEPT135 NMR tec

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Akhramez, Soufiane, Youness Achour, Mustapha Diba, et al. "DFT Study and Synthesis of Novel Bioactive Bispyrazole Using Mg/AlLDH as a Solid Base Catalyst." Current Chemical Biology 14 (September 18, 2020). http://dx.doi.org/10.2174/2212796814999200918175018.

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Background: In this study, an efficient synthesis of novel bispyrazole heterocyclic molecules by condensation of substituted aromatic aldehydes with 1,3-diketo-N-phenylpyrazole by using Mg/Al-LDH as heterogeneous catalyst is reported. The attractive features of this protocol are as follows: mild reaction conditions, good yields and easiness of the catalyst separation from the reaction mixture. Further, a mechanistic study has been performed by using DFT calculations to explain the observed selectivity of the condensation reaction between aryl aldehyde and 1,3-diketo-N-phenylpyrazole via Knoeve

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Issa, Yousry M., Samir A. Abdel-Latif, Aida L. El-Ansary, and Hekmat B. Hassib. "The synthesis, spectroscopic characterization, DFT/TD-DFT/PCM calculations of the molecular structure and NBO of the novel charge-transfer complexes of pyrazine Schiff base derivatives with aromatic nitro compounds." New Journal of Chemistry, 2021. http://dx.doi.org/10.1039/d0nj05397j.

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Novel charge-transfer complexes of pyrazine Schiff bases derived from 2-aminopyrazine with benzaldehyde and N-4-dimethylaminobenzaldehyde with some aromatic nitro compounds have been synthesized and characterizes experimentally and confirmed theoretically.

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Pathan, Amjad Khan, Pravinkumar Patil, Avinash Shinde, and Sainath Zangade. "Eco-friendly and Green Procedure for Iodination of Reactive Aromatics Using PEG 400-I2/HIO3 Combination." Current Green Chemistry 07 (December 8, 2020). http://dx.doi.org/10.2174/2213346107999201208214038.

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Background:: Iodination of organic substrate is an important reaction for synthesis of pharmacological active molecules. Methods:: In view of these concerns, we reported the convenient procedure for synthesis of iodo compounds using iodine and iodic acid in PEG-400.We have reported the eco-friendly procedure for preparation of aromatic iodo compounds using iodine and iodic acid in green reaction media as polyethylene glycol (PEG-400). Results:: The iodination of some aromatic compounds such as benzaldehydes, acetophenones, phenols, amines and heterocyclic compounds carried out using iodine, io

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Zhang, Yandi, Yu Yang, Guanwang Shen, Xueqin Mao, Mengyao Jiao, and Ying Lin. "Identification and Characterization of Aldehyde Oxidase 5 in the Pheromone Gland of the Silkworm (Lepidoptera: Bombycidae)." Journal of Insect Science 20, no. 6 (2020). http://dx.doi.org/10.1093/jisesa/ieaa132.

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Abstract Aldehyde oxidases (AOXs) are a subfamily of cytosolic molybdo-flavoenzymes that play critical roles in the detoxification and degradation of chemicals. Active AOXs, such as AOX1 and AOX2, have been identified and functionally analyzed in insect antennae but are rarely reported in other tissues. This is the first study to isolate and characterize the cDNA that encodes aldehyde oxidase 5 (BmAOX5) in the pheromone gland (PG) of the silkworm, Bombyx mori. The size of BmAOX5 cDNA is 3,741 nucleotides and includes an open reading frame, which encodes a protein of 1,246 amino acid residues.

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Murti, Yogesh, Devender Pathak, and Kamla Pathak. "Green Chemistry Approaches To The Synthesis Of Flavonoids." Current Organic Chemistry 25 (July 28, 2021). http://dx.doi.org/10.2174/1385272825666210728095624.

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: In nature, flavonoids constitute a relatively diverse family of aromatic molecules such as flavones, flavonols, flavanones, isoflavone, chalcones, and their derivatives. Natural and synthetic flavonoids have reported diverse biological activity including antimycobacterial, antimicrobial, antiproliferative, antiarrhythmic, antiviral, antihypertensive, antioxidant, and anti-inflammatory. Flavonoids have garnered much attention as potential targets for nutraceuticals and pharmaceuticals. The recent development of ‘‘Green Chemistry’’ has enabled us to manipulate biosynthetic pathways to generate

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Paşahan, Aziz, Süleyman Köytepe, and Ergun Ekinci. "Synthesis, characterization of pyridine-based polyimides and their use as glucose oxidase immobilization media." e-Polymers 12, no. 1 (2012). http://dx.doi.org/10.1515/epoly.2012.12.1.441.

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AbstractA novel diamine monomer, containing 2,6-diaminopyridine, bis-pdimethylaminophenyl- 2,6-pyridine (S26DAP), was prepared from 4- (dimethylamino)benzaldehyde and 2,6-diaminopyridine. The monomer was characterized by FT-IR, NMR and elemental analyzer. The monomer was then utilized to prepare polyimides with dianhydrides such as pyromellitic dianhydride (PMDA), 3,3’,4,4’-benzophenonetetracarboxylic dianhyride (BPDA), 4,4’- oxydiphthalic anhydride (ODPA) and 3,3’,4,4’-biphenyltetracarboxylic dianhydride (BTDA) by the one-step method; synthesis of polyimides, followed by thermal imidization.

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D SONAWANE, BABASAHEB, VIKAS D. D SONAWANE, KAILAS D SONAWANE, et al. "Cp2ZrCl2: AN EFFICIENT CATALYST FOR MULTICOMPONENT SYNTHESIS OF CAROTENOID DEHYDROSQUALENE SYNTHASE INHIBITING PYRANO[2,3-d]PYRIMIDINEDIONES." Asian Journal of Pharmaceutical and Clinical Research, January 31, 2019, 280–88. http://dx.doi.org/10.22159/ajpcr.2019.v12i2.26862.

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Objectives: The present protocol deals with zirconocene dichloride (Cp2ZrCl2) catalyzed synthesis of pyrano[2,3-d]pyrimidinediones through one-pot multicomponent reactions of aromatic aldehydes with malononitrile and barbituric acid at ambient temperature. All the synthesized compounds were characterized and evaluated for antibacterial, antifungal, and antioxidant activities. Furthermore, a molecular docking was carried out to reveal the atomic insights between synthesized compounds and carotenoid dehydrosqualene synthase (PDB ID: 3ACX). Methods: All the synthesized compounds were evalua

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Leiherer, Andreas, Daria Ślefarska, Marcis Leja, et al. "The Volatilomic Footprints of Human HGC-27 and CLS-145 Gastric Cancer Cell Lines." Frontiers in Molecular Biosciences 7 (January 11, 2021). http://dx.doi.org/10.3389/fmolb.2020.607904.

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The presence of certain volatile biomarkers in the breath of patients with gastric cancer has been reported by several studies; however, the origin of these compounds remains controversial. In vitro studies, involving gastric cancer cells may address this problem and aid in revealing the biochemical pathways underlying the production and metabolism of gastric cancer volatile indicators. Gas chromatography with mass spectrometric detection, coupled with headspace needle trap extraction as the pre-concentration technique, has been applied to map the volatilomic footprints of human HGC-27 and CLS

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