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Journal articles on the topic 'Substituted aldehydes'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Seebacher, Werner, Michael Hoffelner, Ferdinand Belaj, et al. "Formation of 5-Aminomethyl-2,3-dihydropyridine-4(1H)-ones from 4-Amino-tetrahydropyridinylidene Salts." Molecules 28, no. 19 (2023): 6869. http://dx.doi.org/10.3390/molecules28196869.

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Various 4-aminotetrahydropyridinylidene salts were treated with aldehydes in an alkaline medium. Their conversion to 5-substituted β-hydroxyketones in a one-step reaction succeeded only with an aliphatic aldehyde. Instead, aromatic aldehydes gave 5-substituted β-aminoketones or a single δ-diketone. The new compounds were characterized using spectroscopic methods and a single crystal structure analysis. Some of them showed anticancer and antibacterial properties.

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2

Mason, Katelynn M., Michael S. Meyers, Abbie M. Fox, and Sarah B. Luesse. "Application of heterocyclic aldehydes as components in Ugi–Smiles couplings." Beilstein Journal of Organic Chemistry 12 (September 15, 2016): 2032–37. http://dx.doi.org/10.3762/bjoc.12.191.

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Efficient one-pot Ugi–Smiles couplings are reported for the use of furyl-substituted aldehyde components. In the presence of these heterocyclic aldehydes, reactions tolerated variations in amine components and led to either isolated N-arylamide Ugi–Smiles adducts or N-arylepoxyisoindolines, products of tandem Ugi–Smiles Diels–Alder cyclizations, in moderate yields. A thienyl-substituted aldehyde was also a competent component for Ugi–Smiles adduct formation.

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3

Jockers, R., and R. D. Schmid. "Synthesis of Long-Chain Triazine Aldehydes - Substrates of Bacterial Luciferase and Photosynthetic Inhibitors." Zeitschrift für Naturforschung C 47, no. 7-8 (1992): 573–79. http://dx.doi.org/10.1515/znc-1992-7-814.

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S-triazines are photosynthetic inhibitors. They have been substituted with ω-aminoundecanoic acid. The coupling products have been transformed into triazine aldehydes. These compounds displace radioactive terbutryn and have inhibitory effects on photosynthesis in plants and bacteria. Triazine aldehydes were shown to be effective substrates for bacterial luciferase. A competitive assay between photosystem-II-herbicides and aldehyde-labeled triazines is discussed.

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4

Liepa, AJ, AJ Liepa, TC Morton та TC Morton. "Synthesis of 1-(α-Acyloxy-2-hydroxybenzyl)Azoles and Related Compounds by an Acyl Transfer Reaction". Australian Journal of Chemistry 42, № 11 (1989): 1961. http://dx.doi.org/10.1071/ch9891961.

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Novel azole adducts were produced by reaction of azoles and 2-acyloxyaryl aldehydes. The mechanism of the reaction involves attack by the azole at the carbonyl group and transfer of the acyl group to form an azole-substituted benzylic ester. 2-Acyloxyaryl ketones did not undergo an analogous reaction. An aminal was formed rather than an azole-substituted benzylic carbonate when a 2-aryl aldehyde carbonate was used as substrate.

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5

Larnaud, Florent, Charlène Calata, Anaïs Prunier, et al. "Convergent access to mono-fluoroalkene-based peptidomimetics." Organic & Biomolecular Chemistry 20, no. 6 (2022): 1205–18. http://dx.doi.org/10.1039/d1ob02441h.

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Expeditive racemic synthesis of monofluoroalkene peptide isosteres from aldehydes and substituted aromatic sulfones is reported. The olefination reaction is highly Z-selective from substituted aldehydes to afford transoid peptide mimic precursors.

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6

Pelttari, Eila, Eliisa Karhumäki, Jane Langshaw, and Hannu Elo. "Carbohydrazones of Substituted Salicylaldehydes as Potential Lead Compounds for the Development of Narrow-Spectrum Antimicrobials." Zeitschrift für Naturforschung C 62, no. 7-8 (2007): 483–86. http://dx.doi.org/10.1515/znc-2007-7-805.

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Certain substituted salicylaldehydes are known to have highly potent antimicrobial activity against bacteria and fungi, but the mechanism underlying this remarkable activity is not known, and almost nothing has been reported on the effects of further modification of the structures, such as the formation of hydrazone-type derivatives. We report now a study on the antimicrobial properties of the carbohydrazone derivatives of several substituted salicylaldehydes. The compounds studied were synthesized from ring-substituted salicylaldehydes and carbohydrazide in the mole ratio 2:1. They were teste

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7

Reddymasu, Sreenivasulu, Hatti Islavathu, Venkata Sri Ranganath Kalluri, and Ramesh Raju Rudraraju. "Asymmetric hydrogenation of N-heterocycles with sodium cyanoborohydride and S-(–)-binol." Journal of Indian Chemical Society 93, Oct 2016 (2016): 1217–20. https://doi.org/10.5281/zenodo.5639391.

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Department of Chemistry, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, Andhra Pradesh, India <em>E-mail</em> : rrrau1@gmail.com Department of Chemistry, Guru Ghasidas Viswavidyalaya (Central University), Bilaspur-495 009, Chhattisgarh, India <em>Manuscript received online 12 February 2016, accepted 22 May 2016</em> Asymmetric hydrogenation of indole-3-aldehydes, indazole-3-aldehyde and aza indole-3-aldehydes with sodium cyanoborohydride and S-binol under glac. acetic acid over a period of 1–2 h gave enantiomeric excess of 3-substituted 2,3-dihydro alcohols in good yields. This i

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8

Sapnakumari, M., K. Divya, K. B. Aswin, and J. Dalin. "Antimicrobial and Antioxidant Study of Some Newly Synthesized Chalcones and Cyclohexenone Derivatives." Asian Journal of Chemistry 35, no. 1 (2022): 114–18. http://dx.doi.org/10.14233/ajchem.2023.24057.

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Chalcones and cyclohexenone derivatives obtained from various substituted aldehydes and substituted acetophenones are described. Chalcones were obtained by the Claisen-Schmidt condensation reaction of aldehydes with substituted acetophenones. Base catalyzed cyclocondensation of ethyl acetoacetate to chalcones under microwave irradiation leads to the formation of cyclohexenone derivatives. The prepared compounds are characterized by IR, 1H NMR and 13C NMR spectral methods. These are screened for their antimicrobial activity against Staphylococcus aureus, Escherichia coli, Aspergillus niger, Asp

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9

Gaweł, Marta, Justyna Piechocka, and Rafał Głowacki. "TIAZYNOWE I TIAZOLYDYNOWE POCHODNE AMINOKWASÓW SIARKOWYCH I WYBRANYCH ENDOGENNYCH ALDEHYDÓW." Wiadomości Chemiczne 78, no. 11 (2024): 1607–25. https://doi.org/10.53584/wiadchem.2024.11.9.

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Sulfur-containing amino acids, including cysteine (Cys) and homocysteine (Hcy), as well as aldehydes such as formaldehyde (FA), acetaldehyde (AA), pyridoxal 5`-phosphate (PLP), acrolein (ACR), malondialdehyde (MDA), croton aldehyde (CA) and 4-hydoxynonenal (4-HNE) widely occur in the human body. As indicated in the literature, abnormal (elevated) concentrations of these compounds in humans may result in or even be the cause of the occurrence/development of some civilization diseases. At the same time, the literature provides the evidence that Cys and Hcy are a highly reactive towards aldehydes

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10

Halder, Bipasa, Himadri S. Maity, and Ahindra Nag. "One Pot Synthesis of Biscoumarins and Pyranocoumarins by Coconut Juice as a Natural Catalyst." Current Organocatalysis 6, no. 1 (2019): 20–27. http://dx.doi.org/10.2174/2213337206666190219142408.

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Background: The conception of ‘Green chemistry’ is the much inventive chemistry which is potent and more environmentally benign. It is notable that many organic reactions take place in conventional organic solvents, known as volatile organic compounds. Being concerned about the environmental impact, we report a promoting medium, coconut juice (ACC) for one-pot synthesis of biscoumarins and pyranocoumarins which is safe, harmless, green and environmentally benign. Methods and Results: Substituted biscoumarins have been achieved by the reaction of biscoumarin and substituted aromatic aldehydes i

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11

Tiwari, Bhoopendra, Anil Khatana, Vikram Singh, and Manoj Gupta. "A Highly Efficient NHC-Catalyzed Aerobic Oxidation of Aldehydes to Carboxylic Acids." Synthesis 50, no. 21 (2018): 4290–94. http://dx.doi.org/10.1055/s-0037-1610069.

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An N-heterocyclic carbene (NHC) organocatalytic aerobic oxidation of aldehydes to the corresponding carboxylic acids is explored. Remarkably, this method allows for efficient conversion of different classes of aldehydes including highly challenging electron-rich aryl aldehydes, ortho-substituted aryl aldehydes, various heteroaromatic aldehydes and α,β-unsaturated aldehydes under mild reaction conditions. These substrates, under previously reported NHC-catalyzed methods, are typically unreactive or give poor yields, require high reaction temperatures and reaction times of several days.

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12

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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13

Chevis, Philip J., та Stephen G. Pyne. "Synthesis of enantioenriched α-heteroatom functionalised aldehydes by chiral organocatalysis and their synthetic applications". Organic Chemistry Frontiers 8, № 10 (2021): 2287–314. http://dx.doi.org/10.1039/d1qo00101a.

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Asymmetric organocatalysis is a versatile method for the enantioselective α-functionalisation of aldehydes. The synthetic scope for chiral α-heteroatom substituted aldehydes is examined including their applications in synthesis.

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14

Delgado-Hernández, Samuel, Fernando García-Tellado, and David Tejedor. "Cyanovinylation of Aldehydes: Organocatalytic Multicomponent Synthesis of Conjugated Cyanomethyl Vinyl Ethers." Molecules 26, no. 14 (2021): 4120. http://dx.doi.org/10.3390/molecules26144120.

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A novel organocatalytic multicomponent cyanovinylation of aldehydes was designed for the synthesis of conjugated cyanomethyl vinyl ethers. The reaction was implemented for the synthesis of a 3-substituted 3-(cyanomethoxy)acrylates, using aldehydes as substrates, acetone cyanohydrin as the cyanide anion source, and methyl propiolate as the source of the vinyl component. The multicomponent reaction is catalyzed by N-methyl morpholine (2.5 mol%) to deliver the 3-(cyanomethoxy)acrylates in excellent yields and with preponderance of the E-isomer. The multicomponent reaction manifold is highly toler

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15

Phalke, Pallavi L. "Synthesis of different α, β- unsaturated oxazolone derivatives". Journal of Drug Delivery and Therapeutics 9, № 1 (2019): 124–27. http://dx.doi.org/10.22270/jddt.v9i1.2189.

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Acetyl glycine were prepared from glycine acetic anhydride and then 2, 4-disubstituted Oxazol-5-one were prepared from acetyl glycine, substituted aldehydes, acetic anhydride, and sodium acetate as a catalyst. The formed product is evaluated and characterized by thin layer chromatography, infrared spectroscopy and melting point. The, β- unsaturated shows ability to react with various nucleophilic reagents for synthesis of new fused oxazole compounds. Keywords: glycine, acetic anhydride, aldehyde Sodium acetate, Oxazolone, E. coli, Antibacterial Activity.

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16

Kamble, Dhanraj, Anil Shankarwar, Yuvraj Sarnikar, Radhakrushna Tigote, Mubarak Shaikh, and Pravin Chavan. "One-pot Synthesis of Substituted Benzimidazole Derivatives under Ultrasonic Irradiation Using ZnFe2O4 Reusable Catalyst." Chemistry Journal of Moldova 17, no. 2 (2022): 94–100. http://dx.doi.org/10.19261/cjm.2022.892.

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Herein, an efficient one-pot synthesis is described, of substituted benzimidazole derivatives (3a-j) from a condensation of various o-phenylenediamine (1a-j) aromatic aldehyde (2a-j) using ZnFe2O4 as a nano-catalyst under ultrasonic irradiation conditions. All forms of aldehydes with an electron releasing or electron –withdrawing substituent have a significant yield. The catalyst can easily be recovered after completion of the reaction and reused without affecting its activity. Prepared benzimidazole derivatives showed moderate to good anti-tuberculosis results.

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17

Doraghi, Fatemeh, Farid Mohaghegh, Omid Hosseinchi Qareaghaj, Bagher Larijani, and Mohammad Mahdavi. "Synthesis of N-, O-, and S-heterocycles from aryl/alkyl alkynyl aldehydes." RSC Advances 13, no. 20 (2023): 13947–70. http://dx.doi.org/10.1039/d3ra01778h.

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Preparation of many kinds of N-, O-, and S-heterocycles from aryl/alkyl alkynyl aldehydes were investigated in recent years. In this review, the synthesis of bioactive heterocycles using by substituted alkynyl aldehydes is highlighted.

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18

Raj, Tilak, Beant Kaur Billing, Navneet Kaur, and Narinder Singh. "Design, synthesis and antimicrobial evaluation of dihydropyrimidone based organic–inorganic nano-hybrids." RSC Advances 5, no. 58 (2015): 46654–61. http://dx.doi.org/10.1039/c5ra08765a.

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Substituted dihydropyrimidone derivatives were synthesized through one pot multicomponent Zn(ClO<sub>4</sub>)<sub>2</sub>catalysed Biginelli reactions between differently substituted aromatic aldehydes, urea and ethylacetoacetate.

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19

Abonia, Rodrigo, Luisa F. Gutiérrez, Braulio Insuasty, et al. "Catalyst-free assembly of giant tris(heteroaryl)methanes: synthesis of novel pharmacophoric triads and model sterically crowded tris(heteroaryl/aryl)methyl cation salts." Beilstein Journal of Organic Chemistry 15 (March 12, 2019): 642–54. http://dx.doi.org/10.3762/bjoc.15.60.

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A series of giant tris(heteroaryl)methanes are easily assembled by one-pot three-component synthesis by simple reflux in ethanol without catalyst or additives. Diversely substituted indoles (Ar1) react with quinoline aldehydes, quinolone aldehydes, chromone aldehydes, and fluorene aldehydes (Ar2CHO) and coumarins (Ar3) in 1:1:1 ratio to form the corresponding tris(heteroaryl)methanes (Ar1Ar2Ar3)CH along with (Ar1Ar1Ar2)CH triads. A series of new 2:1 triads were also synthesized by coupling substituted indoles with Ar2CHO. The coupling reactions could also be carried out in water (at circa 80 °

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20

Sunitha, K., Smitha Nair, and P. Palanisamy. "Synthesis, Characterization and Biological Evaluation of Some Novel Azo-Imine Compounds." Asian Journal of Chemistry 34, no. 3 (2022): 663–67. http://dx.doi.org/10.14233/ajchem.2022.23591.

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The oxidative cyclization of thiosemicarbazone (III) synthesized from reaction between substituted aryl aldehydes (I) with thiosemicarbazide (II) was done using ferric chloride as oxidative agent to get 2-amino-5-phenyl-1,3,4-thiadiazole (IV). 2-Amino-5-phenyl-1,3,4-thiadiazole was introduced in condensation reactions with substituted aldehydes to obtain benzylidene imine derivatives (VI)1-5. Further these were treated with sulphanilic acid to give new 2-{[5-phenyl-1,3,4-thiadiazole-2-imino] substituted benzene}diazenyl benzene sulfonic acid derivatives (VII)1-5. These derivatives were further

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21

Cernatescu, Corina, and Eugenia Comanita. "Benzazole derivatives: V. The reactivity of some 2-p-tolyl-and 2-p-methylstyryl-benzimidazolium salts." Chemical Industry 58, no. 12 (2004): 548–51. http://dx.doi.org/10.2298/hemind0412548c.

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The reactivity of the p-substituted methyl group in 1-methyl-2-p-tolylbenzimidazolium and 1-methyl-2-p-methylstyrylbenzimidazolium iodides with p-nitroso-dimethylaniline (p-NDMA) and aromatic aldehydes was studied. According to literature data on the steric effects produced by the bulky N-l methyl group, the 2-p-tolyl substituted salt does not react with p-NDMA. On the other hand, 2-p-methylstyryl substituted salts give condensation reactions, similarly to 1,2,3-trimethylbenzimidazolium iodides. The compounds obtained from the reaction with aromatic aldehydes can be used as dyeing substances,

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22

Guillarme, Stéphane, Karen Plé, Aline Banchet, Annie Liard, and Arnaud Haudrechy. "Alkynylation of Chiral Aldehydes: Alkoxy-, Amino-, and Thio-Substituted Aldehydes." Chemical Reviews 106, no. 6 (2006): 2355–403. http://dx.doi.org/10.1021/cr0509915.

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23

Kumar, Rakesh, Govindra Singh, Louis J. Todaro, Lijia Yang, and Barbara Zajc. "E- or Z-Selective synthesis of 4-fluorovinyl-1,2,3-triazoles with fluorinated second-generation Julia–Kocienski reagents." Organic & Biomolecular Chemistry 13, no. 5 (2015): 1536–49. http://dx.doi.org/10.1039/c4ob02179g.

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Second-generation Julia–Kocienski reagents from CuAAC reactions of α-fluoropropargyl benzothiazole sulfone with azides, react with aldehydes and ketones to give N-substituted 4-(1-fluorovinyl)triazoles. Reactions of aldehydes can be tuned towards E or Z-alkenes selectively.

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24

Ahmad, Sohail, Kumar Karitkey Yadav, Uma Narang, Soumee Bhattacharya, Sarangthem Joychandra Singh та S. M. S. Chauhan. "Synthesis, properties and singlet oxygen generation of thiazolidinone double bond linked porphyrin at meso and β-position". RSC Advances 6, № 42 (2016): 36090–95. http://dx.doi.org/10.1039/c6ra03489f.

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Meso and β-substituted free base and zinc metallated thiazolidinone–porphyrin conjugates were synthesized by one pot four component Knoevenagel condensation by utilizing substituted amines, carbon disulfide, ethyl chloroacetate and porphyrin aldehydes.

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25

Carella, Andrea, Gabriel Ramos Ferronatto, Emanuela Marotta, Andrea Mazzanti, Paolo Righi, and Claudio Paolucci. "Betti's base for crystallization-induced deracemization of substituted aldehydes: synthesis of enantiopure amorolfine and fenpropimorph." Organic & Biomolecular Chemistry 15, no. 14 (2017): 2968–78. http://dx.doi.org/10.1039/c6ob02765b.

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26

Anila, Iqbal, iqbal Ghazala, Naveed Umar Muhammad, ur Rashid Haroon, and Wali Khan Sher. "Synthesis of novel silica encapsulated spiropyran based thermochromic materials." RSC open science 2022, no. 9 (2022): 211385. https://doi.org/10.1098/rsos.211385.

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A series of novel spiropyrans were synthesized through the condensation of substituted 3,3-dimethyl-2-methyleneindoline with different nitro-substituted o-hydroxy aromatic aldehydes. Indoles were initially substituted with a variety of alkanes and esters moieties. The substituted 3,3-dimethyl-2-methyleneindoline was then reacted with nitro-substituted o-hydroxy aromatic aldehydes to yield the respective spiropyrans. The synthesized novel spiropyrans were encapsulated in silica nano-shells to protect them from the effect of moisture and pH. The thermochromic behaviour of novel spiropyrans

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27

Mohana, Kikkeri N., and Chikkur B. Pradeep Kumar. "Synthesis and Antioxidant Activity of 2-Amino-5-methylthiazol Derivatives Containing 1,3,4-Oxadiazole-2-thiol Moiety." ISRN Organic Chemistry 2013 (August 19, 2013): 1–8. http://dx.doi.org/10.1155/2013/620718.

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A series of new 5-(2-amino-5-methylthiazol-4-yl)-1,3,4-oxadiazole-2-thiol derivatives 6(a–j) were designed and synthesized with various substituted aldehydes. The chemical structures were confirmed by elemental analyses, FT-IR, 1H NMR, and mass spectral studies. The antioxidant activity of the synthesized compounds was evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl, nitric oxide, and superoxide radical scavenging assay methods. Compounds 6a, 6e, and 6c showed significant radical scavenging potential due to the presence of electron donating substituent on substituted aldehydes.

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28

V. Kanchana, L. Mayavan, A. Kistan, and S. Mohan. "SPECTRAL ELUCIDATION, ANTIMICROBIAL AND ANTIOXIDANT STUDY OF NEWLY SYNTHESIZED PYRAZOLINE DERIVATIVES." RASAYAN Journal of Chemistry 17, no. 01 (2024): 281–87. http://dx.doi.org/10.31788/rjc.2024.1718720.

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The preparation of Chalcones and Pyrazoline derivatives from different aromatic ketones and substituted aldehydes is detailed. Chalcones were produced by reacting aldehydes with substituted aromatic ketones, such as acetophenones, in the Claisen-Schmidt condensation reaction. Cyclohexenone derivatives are produced when ethyl aceto aromatic ketones undergo base-catalyzed cyclo-condensation to Chalcones under microwave radiation. The synthesized compounds are characterized using spectrum techniques from 1H NMR, 13C NMR, and IR. These are examined for their antioxidant qualities as well as their

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29

S., K. Srivastava, L. Srivastava S., and D. Srivastava S. "Synthesis of 5-arylidene-2-aryl-3-(2-chlorophenothiazinoacetamidyl)- 1,3-thiazolidin-4-ones as antifungal and anticonvulsant agents." Journal of Indian Chemical Society Vol. 77, Feb 2000 (2000): 104–5. https://doi.org/10.5281/zenodo.5867100.

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Synthetic Organic Chemistry Laboratory, Department of Chemistry, Dr. H. S. Gour University, Sagar-470 003, India <em>Manuscript received 15 September 1998, revised 25 February 1999, accepted 16 August 1999</em> Condensation of N<sup>10</sup>-(acetohydrazido)-2-chlorophenothiazine (2) with various substituted aromatic aldehydes yields arylideneacetohydrazido-2-chlorophenothiazines (3) which on cycloaddition with mercaptoacetic acid afford the corresponding 4-thiazolidinones (4). Treatment of the 4-thiazolidinones with various substituted aromatic aldehydes afford 5-arylidene-2- aryl-3-(2-chloro

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30

Trost, B., та T. Zhang. "Asymmetric Synthesis of α-Substituted Aldehydes". Synfacts 2007, № 5 (2007): 0518. http://dx.doi.org/10.1055/s-2007-968279.

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31

Popkov, S. V., and A. V. Kuzenkov. "Synthesis of trifluoromethyl-substituted heteroaromatic aldehydes." Russian Chemical Bulletin 54, no. 7 (2005): 1672–74. http://dx.doi.org/10.1007/s11172-006-0020-x.

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32

Valenta, Zdenek, David I. MaGee та Santosa Setiadji. "Direct Alkylation of α-Substituted Aldehydes". Journal of Organic Chemistry 61, № 26 (1996): 9076–77. http://dx.doi.org/10.1021/jo9614710.

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33

Brome, Victoria A., Laurence M. Harwood, and Helen MI Osborn. "Preparation of enantiopure long chain threo-2-amino-3-hydroxyesters via chiral morpholinone-derived azomethine ylids." Canadian Journal of Chemistry 84, no. 10 (2006): 1448–55. http://dx.doi.org/10.1139/v06-121.

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The synthetic approach to threo-2-amino-3-hydroxyesters possessing long alkyl chains outlined herein centres on the generation of chiral azomethine ylids by reaction of (5R)-5-phenyl-morpholin-2-one, (R)-(1), with long chain aldehydes. In the presence of a second equivalent of aldehyde, the azomethine ylid can be trapped to afford a cycloadduct with three new stereodefined centres. Degradation of the cycloadduct allows entry to β-substituted-α-amino acid derivatives, which have potential as building blocks for sphingosine synthesis.Key words: sphingosine, morpholinone, chiral azomethine ylid,

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34

Sansook, Supojjanee, Cory A. Ocasio, Iain J. Day, et al. "Synthesis of kinase inhibitors containing a pentafluorosulfanyl moiety." Organic & Biomolecular Chemistry 15, no. 40 (2017): 8655–60. http://dx.doi.org/10.1039/c7ob02289a.

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A series of 3-methylidene-1H-indol-2(3H)-ones substituted with a 5- or 6-pentafluorosulfanyl group has been synthesized by a Knoevenagel condensation reaction of SF<sub>5</sub>-substituted oxindoles with a range of aldehydes.

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35

Nasir, Hussain, Ram Dangi Raja, Kumar Sain Devendra, and L. Talesara Ganpat. "Convenient synthesis of 1-N, 7-N-bisethoxyphthalimido-4-(3,5-dimethyl-4- substitutedphenyl-4, 7-dihydro-1H-dipyrazolo[3,4-b;4' ,3' -e ]pyridin-8-yl)phenylamine." Journal of Indian Chemical Society Vol. 88, Jul 2011 (2011): 1021–24. https://doi.org/10.5281/zenodo.5785141.

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Synthetic Organic Chemistry Research Laboratory, Department of Chemistry, M. L. Sukhadia University, Udaipur-313 001, Rajasthan, India <em>E-mail </em>: glntalesara@yahoo.com <em>Manuscript received 22 March 2010, revised 05 October 2010, accepted 30 December 2010</em> In the three component one pot synthesis 5-methyl-2,4-dihydro-3H-pyrazole-3-one reacted with substituted aldehydes and p-phenylenediamine to produce 4-{3,5-dimethyl-4-(substitutedphenyl)-4, 7-dihydro-1H-diprazolo[3,4-b;4<em>'</em> ,3<em>'</em>e] pyridin-8-yl}phenylamine (4a-e). Condensation of (4a-e) with two mole of bro

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36

D., K. Raikwar, K. Srivastava S., and D. Srivastava S. "Synthesis of some new arylidenes-substituted phenyl-1,3,4-thiadiazol-4-oxothiazolidines : Antimicrobial and diuretic activities." Journal of Indian Chemical Society Vol. 85, Jan 2008 (2008): 78–84. https://doi.org/10.5281/zenodo.5808560.

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Synthetic Organic Chemistry Laboratory, Department of Chemistry, Dr. H. S. Gour University, Sagar-470 003, Madhya Pradesh, India <em>E-mail:</em> professorsks@rediffmail.com Manuscript received 9 January 2007, revised 21 August 2007, accepted 16 October 2007 A series of new [2-(substituted aryl)-3-{5-(substituted phenyl)-1,3,4-thiadiazol}]-4-oxo-thiazolidines, 3(ao) have been synthesized via the condensation of 5-(substituted phenyl)-2-(2-substituted benzylidene amino)-1,3,4- thiadiazoles, 2(a-o) with thioglycolic acid. The compounds 2(a-o) were synthesized from 5-(substituted phenyl)-2- amino

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M.G., Dhonde, та P. Deshmukh S. "Synthesis and antimicrobial activity of tetra-O-benzoyi-β-D-glucopyranosyl arylidene thiosemicarbazones". Journal of Indian Chemical Society Vol. 88, Feb 2011 (2011): 289–91. https://doi.org/10.5281/zenodo.5773536.

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Shri Mathuradas Mohota College of Science, Nagpur-440 009, Maharashtra, India <em>E-mail </em>: madhudash200l@yahoo.co.in P.G. Department of Chemistry, Shri Shivaji College, Akola-440 001, Maharashtra, India <em>Manuscript received 17 February 2009, revised 30 June 2010, accepted 07 July 2010</em> 4-Tetra-<em>O</em>-benzoyl-β-n-glucopyranosyl-1-arylidine thiosemicarbazones have been synthesised by the interaction or tetra-O-benzoyl-β-D-glucopyranosyl thiosemicarbazlde and aryl aldehydes. These compounds were screened for their antibacterial and antifungal activity against E. coli, S.

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Kottapalle, Gajanan D., Nagesh J. Deshmukh, and Avinash T. Shinde. "Growth Inhibitory Properties of Synthetic Chalcones." Current Bioactive Compounds 16, no. 6 (2020): 892–99. http://dx.doi.org/10.2174/1573407215666190401202553.

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Background: In the present study, chalcones were synthesized from 2-hydroxy-1- acetonaphthone and substituted aromatic aldehydes were synthesized by Claisen Schmidt condensation reaction using potassium hydroxide as a base. The synthesized chalcones were purified by recrystallization from ethanol and evaluated for antibacterial activity by well diffusion method. The antibacterial activity was evaluated against Bacillus licheniformis, Bacillus species, Escherichia coli and Staphylococcus aureus using Ciprofloxacin as a standard. Methods: The target molecules were prepared by reacting 2-hydroxy-

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Verochkina, Ekaterina A., Nadezhda Victorovna Vchislo та Igor B. Rozentsveig. "α-Functionally Substituted α,β-Unsaturated Aldehydes as Fine Chemicals Reagents: Synthesis and Application". Molecules 26, № 14 (2021): 4297. http://dx.doi.org/10.3390/molecules26144297.

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α-Functionalized α,β-unsaturated aldehydes is an important class of compounds, which are widely used in fine organic synthesis, biology, medicine and pharmacology, chemical industry, and agriculture. Some of the 2-substituted 2-alkenals are found to be the key metabolites in plant and animal cells. Therefore, the development of efficient methods for their synthesis attracts the attention of organic chemists. This review focusses on the recent advances in the synthesis of 2-functionally substituted 2-alkenals. The approaches to the preparation of α-alkyl α,β-unsaturated aldehydes are not includ

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Ramaiah, Manjunatha M., Nanjunda Swamy Shivananju, and Priya Babu Shubha. "A Facile, Efficient and Solvent-Free Titanium (IV) Ethoxide Catalysed Knoevenagel Condensation of Aldehydes and Active Methylenes." Letters in Organic Chemistry 17, no. 2 (2020): 107–15. http://dx.doi.org/10.2174/1570178616666190401194641.

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: Titanium ethoxide has been employed as a novel and efficient reagent for the Knoevenagel condensation of aldehydes with active methylenes such as diethyl malonate and ethyl cyanoacetate under solvent free conditions to afford substituted olefins in high to excellent yields. The reaction is suitable for a variety of aromatic, aliphatic and heteroaromatic aldehydes with various active methylenes. Parallel to this, microwave irradiation has been utilized to achieve improved reaction rates and enhanced yields. Herein, we illustrated a convenient method for the preparation of α,β-unsaturated comp

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Campbell, Adam, Nikolas R. Dos Santos, and Igor Alabugin. "Photochemical Uncaging of Aldehydes and Ketones via Photocyclization/Fragmentation Cascades of Enyne Alcohols: An Unusual Application for a Cycloaromatization Process." Molecules 28, no. 15 (2023): 5704. http://dx.doi.org/10.3390/molecules28155704.

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We utilized a cycloaromatization reaction driven by relief of excited state antiaromaticity to photouncage aldehydes and ketones. We developed several synthetic routes towards the synthesis of photocaged carbonyls as allylically substituted 3-(2-(arylethynyl)phenyl)prop-2-en-1-ols. A library of photocaged aryl aldehydes and ketones containing donors and acceptors, as well as several photocaged fragrance aldehydes and the steroid 5α-cholestan- 3 -one, were synthesized and demonstrated photouncaging in good to excellent yields.

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Beebe, Alexander W., Emma F. Dohmeier, and Gustavo Moura-Letts. "Diastereoselective synthesis of substituted diaziridines from simple ketones and aldehydes." Chemical Communications 51, no. 70 (2015): 13511–14. http://dx.doi.org/10.1039/c5cc04813c.

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Diastereopure substituted diaziridines from simple ketones, aldehydes and amines are here reported. These important chemical scaffolds are obtained in the presence of a weak inorganic base and hydroxylamine O-sulfonic acid (HOSA). This method provides a wide variety of substituted diaziridines with high yields and diastereoselectivities.

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Wölfling, János, Erzsébet Mernyák, Melinda Sebők, and Gyula Schneider. "Synthesis of Some Steroidal Oxazolines." Collection of Czechoslovak Chemical Communications 66, no. 12 (2001): 1831–40. http://dx.doi.org/10.1135/cccc20011831.

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Steroidal oxazolines 4a-4d and 5a-5f were synthesized. The acid-catalyzed reactions of 21-azido-20-hydroxy- and 21-hydroxy-20-azidosteroids with substituted aromatic aldehydes led to the formation of androst-5-en-3β-ols substituted in position 17β with oxazoline residues.

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Khalifeh, Reza, Najme Rastegar, and Dariush Khalili. "Highly Active and Reusable Cu/C Catalyst for Synthesis of 5-Substituted 1H-Tetrazoles Starting from Aromatic Aldehydes." Acta Chimica Slovenica 67, no. 4 (2020): 1044–52. http://dx.doi.org/10.17344/acsi.2019.5492.

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A new, efficient and convenient method for the synthesis of 5-substituted 1H-tetrazole derivatives with a wide range of substituents in good to excellent yields has been developed. The synthesis was performed by the one-pot three-component [3+2]cycloaddition reaction between aldehyde, hydroxylamine and sodium azide in the presence of Cu/C. The reaction probably proceeds by the in situ formation of nitriles followed by successive [3+2]cycloaddition with sodium azide. A variety of aldehydes were used to obtain the corresponding tetrazoles. The catalyst was recovered by simple filtration and reus

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Jiang, Pengcheng, Xingzong Che, Yunfeng Liao, Huawen Huang, and Guo-Jun Deng. "Three-component 2-aryl substituted benzothiophene formation under transition-metal free conditions." RSC Advances 6, no. 48 (2016): 41751–54. http://dx.doi.org/10.1039/c6ra07730g.

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Ramesh, Baboo. "Ru (III) Catalysed Oxidative Degradation of Sodium Bisulphite Derivatives of Aromatic Aldehydes by Potassium Hexacyano Ferrate (III) in Aqueous Alkaline Medium." International Journal of Current Research and Review 14, no. 19 (2022): 17–20. http://dx.doi.org/10.31782/ijcrr.2022.141903.

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Introduction: The catalysed oxidation of the derivatives of aromatic aldehydes with inorganic moieties is still unstudied with an economically cheaper oxidant like potassium hexacyanoferrate (III). The catalyst like ruthenium (III) chloride is very much effective at very low concentrations for oxidation reactions. Aims: The study is carried out to observe and to get the results about the oxidative degradation of derivatives of organic and inorganic moieties. Methodology: Benzaldehyde sodium bisulphite (BSS) and substituted aromatic aldehyde sodium bi sulphite like p-chloro benzaldeyde sodium b

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Gulková, Daniela, and Miloš Kraus. "Dehydrogenation of Substituted Alcohols to Aldehydes on Zinc Oxide-Chromium Oxide Catalysts." Collection of Czechoslovak Chemical Communications 57, no. 11 (1992): 2215–26. http://dx.doi.org/10.1135/cccc19922215.

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Sixteen primary alcohols of the structure RCH2OH (R = CH3, C2H5, (CH3)2CH, (CH3)3CCH2, HOCH2, CH3OCH2, C6H5, C6H5CH2, C6H5OCH2, ClCH2, BrCH2, F3C, CNCH2, (CH3)2NCH2, (C2H5)2NCH2 and tetrahydrofurfuryl) were explored for the possibility of obtaining the corresponding aldehydes by dehydrogenation on solid catalysts. Various catalysts were tested and two zinc oxide-chromium oxide catalysts were selected for further work because their activity and selectivity was satisfactory; moreover, the selectivity could be improved by addition of sodium into the catalysts and of water into the feed. The react

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Cano, Israel, Luis M. Martínez-Prieto, Laure Vendier, and Piet W. N. M. van Leeuwen. "An iridium–SPO complex as bifunctional catalyst for the highly selective hydrogenation of aldehydes." Catalysis Science & Technology 8, no. 1 (2018): 221–28. http://dx.doi.org/10.1039/c7cy01953j.

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Chen, Jinjin, Dan Chang, Fuhong Xiao, and Guo-Jun Deng. "Four-component quinazoline synthesis from simple anilines, aromatic aldehydes and ammonium iodide under metal-free conditions." Green Chemistry 20, no. 24 (2018): 5459–63. http://dx.doi.org/10.1039/c8gc02654h.

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Lv, Jiaying, and Ruimao Hua. "LiOtBu-Promoted Intramolecular 1,3-Dipolar Cycloaddition of the 2′-Alkynyl-biaryl-2-aldehyde N-Tosylhydrazones Approach to 3-Substituted 1H-Dibenzo[e,g]indazoles." Molecules 28, no. 24 (2023): 8061. http://dx.doi.org/10.3390/molecules28248061.

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A two-step, one-pot synthesis of 3-substituted 1H-dibenzo[e,g]indazoles in good to high yields via a LiOtBu-promoted intramolecular 1,3-dipolar cyclization of 2′-alkynyl-biaryl-2-aldehyde N-tosylhydrazones was developed. The N-Ts-hydrazones used were prepared in situ via the reactions of 2′-alkynyl-biaryl-2-aldehydes and TsNHNH2 (p-methylbenzenesulfonohydrazide). Two types of signals related to the hydrogen bonds, forming in several products, were observed in the 1H NMR spectra recorded in DMSO-d6, assigned to N-H bonds in their dimeric species of product and tautomer.

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