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Journal articles on the topic 'Aromatic aldehyde'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Zhou, Baocheng, and Wenxing Chen. "The Zwitterionic Imidazolium Salt: First Used for Synthesis of 4-Arylidene-2-phenyl-5(4H)-oxazolones under Solvent-Free Conditions." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/280585.

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The zwitterionic imidazolium salt was prepared and characterized by1H NMR. It was first used for synthesis of azlactones via Erlenmeyer synthesis from aromatic aldehydes and hippuric acid under solvent-free conditions. It was found that aldehyde substituents play an important role in these reactions. Better conversions and therefore higher isolated yields were observed when electron-withdrawing groups (EWG-) were present in the aromatic aldehyde. Opposite results were shown when electron-donating groups (EDG-) were present in the aromatic aldehyde. However, azlactones were obtained in moderate

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2

Deng, Haibo, Hao Zhang, Zelong Wu, Xiuzhi Tian, Xue Jiang, and Weimin Guo. "Rules and mechanism for the oxidation of lignin-based aromatic aldehyde under alkaline wet oxygen." BioResources 15, no. 2 (2020): 3487–503. http://dx.doi.org/10.15376/biores.15.2.3487-3503.

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To explore the extensive oxidative mechanism of syringaldehyde, vanillin, and p-hydroxybenzaldehyde during the alkaline wet oxidation process (AWOP), the yield of these aromatic aldehydes from AWOP at various temperatures and reaction times was studied. The results showed that the aromatic aldehydes could not be converted into the corresponding aromatic acids during the AWOP, and that the aromatic aldehyde was stable when subjected to the oxygen-free AWOP. However, as the reaction temperature increased or the number of methoxyl groups on the aromatic ring increased, the yield of aromatic aldeh

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3

Kawajiri, Takahiro, Reiya Ohta, Hiromichi Fujioka, Hironao Sajiki, and Yoshinari Sawama. "Aromatic aldehyde-selective aldol addition with aldehyde-derived silyl enol ethers." Chemical Communications 54, no. 4 (2018): 374–77. http://dx.doi.org/10.1039/c7cc08936h.

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4

Ma, Yunjian, Zongquan Li, Hao Zhang, Vincent Kam Wai Wong, Frank Hollmann, and Yonghua Wang. "Bienzymatic Cascade Combining a Peroxygenase with an Oxidase for the Synthesis of Aromatic Aldehydes from Benzyl Alcohols." Catalysts 13, no. 1 (2023): 145. http://dx.doi.org/10.3390/catal13010145.

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Aromatic aldehydes are important aromatic compounds for the flavour and fragrance industry. In this study, a parallel cascade combining aryl alcohol oxidase from Pleurotus eryngii (PeAAOx) and unspecific peroxygenase from the basidiomycete Agrocybe aegerita (AaeUPO) to convert aromatic primary alcohols into high-value aromatic aldehydes is proposed. Key influencing factors in the process of enzyme cascade catalysis, such as enzyme dosage, pH and temperature, were investigated. The universality of PeAAOx coupled with AaeUPO cascade catalysis for the synthesis of aromatic aldehyde flavour compou

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5

Petko, Kirill I., Andrey A. Filatov, and Taras M. Sokolenko. "Features of Nitration of Aromatic Aldehydes with the Difluoromethoxy Group." Journal of Organic and Pharmaceutical Chemistry 21, no. 3 (2023): 3–10. http://dx.doi.org/10.24959/ophcj.23.285469.

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Nitration of aromatic aldehydes with difluoromethoxy group results in the partial ipso-substitution of the aldehyde group if difluoromethoxy group is located in the para-position to the aldehyde group. The presence of a chlorine atom in the meta-position to the aldehyde group increases the contribution of the ipso-substitution, while the presence of a chlorine atom in the ortho-position to the aldehyde group reduces it. The presence of strong donors (alkoxy groups) in the molecule eliminates the contribution of the ipso-substitution.

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6

Yang, Xue-Qing, Zhen-Yu Yi, Sheng-Fu Wang, Ting Chen, and Dong Wang. "Construction of 2D extended cocrystals on the Au(111) surface via I⋯Oaldehyde halogen bonds." Chemical Communications 56, no. 24 (2020): 3539–42. http://dx.doi.org/10.1039/d0cc00199f.

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7

Vishvanath, D. Patil, P. Patil Ketan, R. Sutar Nagesh, and V. Gidh Prathamesh. "Efficient synthesis of biscoumarins using zinc acetate as a catalyst in aqueous media." Chemistry International 3, no. 3 (2017): 240–43. https://doi.org/10.5281/zenodo.1473124.

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Bis-(4-hydroxycoumarin)methanes derivatives (1-9) were synthesized via one pot condensation reaction of various aromatic aldehyde and 4-hydroxycoumarin using zinc acetate as a catalyst in presence of water as a solvent. This mediated reaction of various aromatic and hetero-aromatic aldehydes using catalytic amounts of zinc acetate avoids the use of expensive, corrosive reagents, toxic solvents and provides operational simplicity.

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8

Arthur-Santiago, Margarita A., Rosa María Oliart-Ros, María G. Sánchez-Otero, and Gerardo Valerio-Alfaro. "Mechanochemo-enzymatic Synthesis of Aromatic Aldehyde Oxime Esters." Natural Product Communications 13, no. 7 (2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300723.

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The synthesis of aromatic aldehyde oxime esters (considered fragrances, antifungal and antimicrobial compounds) was achieved by two reactions which combine the advantage of green chemistry and biocatalysis. In the first step, the mechanochemical oxime synthesis by means of grindstone milling of six solid aromatic aldehydes and hydroxylamine hydrochloride in the presence of FlorisilR, as the best support, yielded the aromatic aldehyde oximes 1–6 with high purity and good yields. In the second step the lipase catalyzed acetylation reaction at 40°C for three days of those oximes with vinyl and is

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9

Massa, Antonio, Laura Capozzolo, and Arrigo Scettri. "Sulfoxides in the allylation of aldehydes in the presence of silicon tetrachloride and allyltributylstannane." Open Chemistry 8, no. 6 (2010): 1210–15. http://dx.doi.org/10.2478/s11532-010-0099-7.

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AbstractSiCl4 can be conveniently activated by catalytic amounts of dimethyl sulfoxide or other readily-available sulfoxides for the allylation of aromatic, hetero-aromatic and unsaturated aldehydes in the presence of allyltributyl stannane. Chiral aryl methyl sulfoxides have been used to develop asymmetric allylation methods, as well as probe the aldehyde substrate scope.

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10

Nemec, Vinko, Luka Fotović, Toni Vitasović, and Dominik Cinčić. "Halogen bonding of the aldehyde oxygen atom in cocrystals of aromatic aldehydes and 1,4-diiodotetrafluorobenzene." CrystEngComm 21, no. 21 (2019): 3251–55. http://dx.doi.org/10.1039/c9ce00340a.

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Novel halogen bonded cocrystals of aromatic aldehydes have been synthesized. We present the halogen bond acceptor potential of the aldehyde group oxygen atom in competition with the hydroxy, methoxy and pyridine groups.

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11

Levina, Anastasia A., Denis Dmitrievich Borisov, Maxim Alexandrovich Novikov, Maxim Andreevich Shmelev, Roman Aleksandrovich Novikov та Yury Vasil'evich Tomilov. "Reactions of β-styrylmalonates with aromatic aldehydes: the development of a catalytic version using gallium trichloride". Mendeleev Communications 35, № 3 (2025): 261–63. https://doi.org/10.71267/mencom.7594.

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A catalytic system based on gallium trichloride and silver tetrafluoroborate was successfully tested in the [2 + 3]-annulation reaction of β-styrylmalonates with aromatic aldehydes leading to 2-arylinden-1-ylmalonates. This allows to reduce the amount of gallium compound and to halve the amount of aldehyde used while maintaining the optimal yields of the resulting indenylmalonates previously achieved using 2 equiv. of GaCl<sub>3</sub> and 4-6 equiv. of aldehyde. Under these conditions, aldehydes previously non-reactive were also involved into the transformation.

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12

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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13

Jagessar, R. C. "Porphyrins based Nanomaterials, the Future of Science." Journal of Nanosciences Research & Reports 5, no. 3 (2023): 1–3. http://dx.doi.org/10.47363/jnsrr/2023(5)153.

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Porphyrins are terapyrrolic compounds that are usually synthesized by the condensation of aromatic aldehyde with pyrrole or the reaction of dipyrromethene with an aromatic aldehyde followed by oxidation with p-chloranil.

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14

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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15

Kantlehner, Willi, Georg Ziegler, Jochen Mezger, et al. "Zur Formylierung von Hydroxy- und Alkoxyaromaten mit Ameisensäure." Zeitschrift für Naturforschung B 74, no. 10 (2019): 709–32. http://dx.doi.org/10.1515/znb-2019-0076.

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AbstractBy treatment of ethers of phenol, resorcinol, 2-napththol, alkylanisoles 10, 13, 15, 17, 20, 22, 24, 28 with formic acid/borontrichloride the aromatic aldehydes 11, 14, 16, 18, 21, 23, 25, 26, 29 can generally be prepared in low yields. The formylation reactions proceed between −20 and −10°C within 20 min in 1,2-dichloroethane, chlorobenzene, or methylene chloride as solvents when formic acid and borontrichloride are used in excess [molar ratio of aromatic compound to HCOOH to BCl3 = 1:1.2–1.7:1.6–1.8]. The more strongly activated 3,5-dimethoxyphenol (33) is formylated by formic acid/b

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16

Gryko, Daniel T., and Katarzyna E. Piechota. "Straightforward route to trans-A2B-corroles bearing substituents with basic nitrogen atoms." Journal of Porphyrins and Phthalocyanines 06, no. 02 (2002): 81–97. http://dx.doi.org/10.1142/s1088424602000129.

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We have developed a comprehensive methodology that affords regioisomerically pure trans- A 2 B -corroles bearing substituents with basic nitrogen atoms at meso positions. The corrole formation reaction involves the acid-catalyzed condensation of a dipyrromethane (DPM) and an aldehyde followed by oxidation with DDQ. The optimal conditions for this process were identified by extensive modifications of the previously developed conditions for the synthesis of trans-A2B-corroles with aromatic substituents. In particular three distinct sets of conditions were identified for various specific cases. P

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17

Zeng, Fan Suo, Hui Wei Zhang, Ya Guang Zhan, and Ying Xin. "Cloning and Expression Analysis of ALDH Conserved cDNA Region from Fraxinus velutina." Advanced Materials Research 282-283 (July 2011): 616–20. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.616.

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Aldehyde dehydrogenases (ALDHs) represent a protein superfamily of NAD(P)+-dependent enzymes that oxidize a wide range of endogenous and exogenous aliphatic and aromatic aldehydes. The conserved sequence of aldehyde dehydrogenase gene (ALDH) was amplified fromFraxinus velutinaby RT-PCR. The results demonstrated that the conserved sequence was 718 bp in length, which was deduced coding 229 amino acids. Homology analysis showed that the deduced amino acids sequence ofFvALDHshared 56.9%%-73% identity with aldehyde dehydrogenase from other plants. We examined the expression pattern of theFvALDHgen

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18

Kutasevich, Anton V., Anna S. Efimova, Marina N. Sizonenko, Valery P. Perevalov, Ludmila G. Kuz’mina, and Vitaly S. Mityanov. "Unexpected Aldehyde-Catalyzed Reaction of Imidazole N-Oxides with Ethyl Cyanoacetate." Synlett 31, no. 02 (2019): 179–82. http://dx.doi.org/10.1055/s-0039-1691527.

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The reaction of 2-unsubstituted imidazole N-oxides with ethyl cyanoacetate and aromatic aldehydes leads to the formation of ethyl 2-cyano-2-(1,3-dihydro-2H-imidazole-2-ylidene)acetates. The reaction proceeds through an initial [3+2] cycloaddition, followed by cleavage of the cycloadduct and regeneration of the aldehyde, which essentially plays a catalytic role.

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19

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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20

Nazarifar, Mohammad Reza. "Cobalt(II) Chloride Hexahydrate as an Efficient and Inexpensive Catalyst for the Preparation of Biscoumarin Derivatives." Advances in Chemistry 2014 (October 12, 2014): 1–5. http://dx.doi.org/10.1155/2014/340786.

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Cobalt(II) chloride hexahydrate (CoCl2·6H2O) has been found to be an efficient catalyst for the one-pot synthesis of biscoumarin derivatives through a combination of aromatic aldehydes and 4-hydroxycoumarin in aqueous media at 70°C. Several types of aromatic aldehyde, containing electron-withdrawing groups as well as electron-donating groups, were used in the reaction and in all cases the desired products were synthesized successfully. The present approach offers remarkable advantages such as short reaction times, excellent yields, straightforward procedure, easy purification, environment frie

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21

Bisagni, Emile, Marilys Rautureau, Martine Croisy-Delcey, and Christiane Huel. "Nouvelle synthèse de chloro-1 méthyl-5 isoquinoléines fusionnées à divers systèmes aromatiques par leur liaison [g]." Canadian Journal of Chemistry 65, no. 9 (1987): 2027–30. http://dx.doi.org/10.1139/v87-337.

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Lithiation of 4-acetyl 2-chloro pyridine ethylene glycol ketal by exchange with lithium diisopropylamine (LDA) led to 4-acetyl 2-chloro 3-lithio pyridine ethylene glycol ketal. This lithio derivative was reacted with aromatic aldehydes giving the expected alcohols, which were reduced by triethylsilane and trifluoroacetic acid at room temperature. The resulting 4-acetyl 3-arylmethyl 2-chloro pyridine ethylene glycol ketals were hydrolysed and cyclized in acidic medium, leading to polycondensed heterocyclic systems that have a 1-chloro 5-methyl isoquinoline nucleus fused by its [g] bond to the s

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22

Betterley, Nolan, Sopanat Kongsriprapan, Suppisak Chaturonrutsamee, et al. "Electrophilic Aromatic Formylation with Difluoro(phenylsulfanyl) methane." Synthesis 50, no. 10 (2018): 2033–40. http://dx.doi.org/10.1055/s-0036-1591545.

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Difluoro(phenylsulfanyl)methane (PhSCF2H) was found to undergo a reaction with aromatic compounds mediated by SnCl4, through a thionium intermediate characterized by NMR and TD-DFT analyses, leading to the formation of a mixture of S,S′-diphenyl dithioacetal and aromatic aldehyde which, after oxidative hydrolysis, provides the aromatic aldehyde in good to excellent yields. The salient feature of the present work is the reaction of activated aromatic compounds containing a deactivating ester functional group, leading to the formylated products in good yields.

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23

I., ALPHONSE, and J. ARULRAJ S. "Action of Lewis Acids on Aromatic Acetals." Journal of Indian Chemical Society Vol. 63, Sep 1986 (1986): 820–22. https://doi.org/10.5281/zenodo.6298845.

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Department of Chemistry, St. Joseph's College (Autonomous), Tiruchirapalli-620 002 <em>Manuscript received 30 July 1984, revised 30 May 1985, accepted 25 June 1986</em> Acetals of the type X.C<sub>6</sub>H<sub>4</sub>CH(OR)<sub>2</sub>, where R - Et, n-Bu and isoamyl, and X - H and CH<sub>2</sub>, react with antimony pentachloride and ferric chloride in anhydrous 1,2-dichloroethane to give benzyl alkyl ether, alkyl benzoate, benzyl ester, α-<em>β</em>-unsaturated aldehyde, benzaidehyde and a small quantity of benzyl alcohol <em>p</em>-Nitrobenzaldehyde di <sub><sup>\(n\)</s

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24

Jin, Ming Yu, Sun Min Kim, Hui Mao, Do Hyun Ryu, Choong Eui Song, and Jung Woon Yang. "Chemoselective and repetitive intermolecular cross-acyloin condensation reactions between a variety of aromatic and aliphatic aldehydes using a robust N-heterocyclic carbene catalyst." Org. Biomol. Chem. 12, no. 10 (2014): 1547–50. http://dx.doi.org/10.1039/c3ob42486c.

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25

Sheikhi, Ehsan, Mehdi Adib, Morteza Karajabad, and Seyed Gohari. "Sulfuric Acid-Promoted Oxidation of Benzylic Alcohols to Aromatic Aldehydes in Dimethyl Sulfoxide: An Efficient Metal-Free Oxidation Approach." Synlett 29, no. 07 (2018): 974–78. http://dx.doi.org/10.1055/s-0037-1609149.

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An efficient metal-free oxidation of benzylic alcohols to aromatic aldehydes is described. Heating a solution of the benzylic alcohol in DMSO in the presence of H2SO4 afforded the corresponding aldehyde in excellent yield. This oxidation reaction, which proceeds with a short reaction time and no side products, is akin to the Pfitzner–Moffatt oxidation, but without the need for N,N′-dicyclohexylcarbodiimide.

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26

Zhang, Yue Cheng, Jing Yuan Gao, Nai Yue Shi, and Ji Quan Zhao. "Synthesis of Chiral Tridentate Ligands Embodying the Bispidine Framework and their Application in the Enantioselective Addition of Diethylzinc to Aldehydes." Advanced Materials Research 396-398 (November 2011): 1236–43. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1236.

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Several new chiral tridentate ligands with the bispidine moiety were synthesized from N-alkyl bispidines and chiral amino (or hydroxyl) acids. The synthesized ligands were used as catalysts in the enantioselective addition of diethylzinc to several aromatic aldehydes and an aliphatic aldehyde. High yield and enantioselectivity were received in the cases of aromatic aldehydes as substrates especially when the employed chiral ligand has a hydroxyl group attached to the chiral center. The effect of the structure, the amount of tridentate chiral ligands, solvent and temperature on the enantioselec

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27

Gard, J. C., B. Hanquet, L. Roullier, Y. Mugnier, and J. Lessard. "Electrochemically induced chain reactions: the addition of fluorene and indene to aromatic aldehydes initiated by electrochemical reduction." Canadian Journal of Chemistry 74, no. 1 (1996): 55–63. http://dx.doi.org/10.1139/v96-007.

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The electrochemical reduction at −30 °C of 2,6-dichlorobenzaldehyde (1a), benzaldehyde (1b), and terephthalaldehyde (2) in tetrahydrofuran with tetrabutylammonium perchlorate as supporting electrolyte, under an argon atmosphere and in the presence of fluorene or indene, gives carbinols resulting from the addition of fluorene or indene and requires only a catalytic amount of electricity. The chain reaction is initiated by proton abstraction from fluorene or indene by a base electrogenerated by reduction of the aldehyde and the propagation involves the addition of the carbanion to the aldehyde f

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28

Angamuthu, Venkatachalam, Chia-Hung Lee, and Dar-Fu Tai. "Brucine Diol-Catalyzed Enantioselective Morita-Baylis-Hillman Reaction in the Presence of Brucine N-Oxide." Catalysts 11, no. 2 (2021): 237. http://dx.doi.org/10.3390/catal11020237.

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Brucine diol (BD) catalyzed asymmetric Morita–Baylis–Hillman (MBH) reaction is observed for the first time. Brucine N-oxide (BNO) was found to not have an effective chiral catalyst. Faster reaction rate was obtained using unsaturated ester or aromatic aldehydes in the presence of BNO. 4-Nitrobenzaldehyde and α,β-unsaturated ketone/ester were converted to the MBH adduct in moderate yields (up to 74%) with 70% ee value by this catalytic system. The mechanism of BD catalysis is probably initiated by conjugating the vicinal diol of BD to the carbonyl group of the aromatic aldehyde through hydrogen

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29

Nie, Siyu, and Leichang Cao. "Selective Production of Aromatic Aldehydes by Stepwise Degradation of Typical Eight Landscaping Biomass Waste: Effect of Reaction Temperature and Time." E3S Web of Conferences 185 (2020): 04025. http://dx.doi.org/10.1051/e3sconf/202018504025.

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Greening waste presents considerable reuse potential owing to its simple organic composition. For greening waste, being simply regarded as ordinary garbage cannot adapt to the requirements of sustainable and harmless development. Resource reusing process is an inevitable trend. Utilization of urban landscape greening waste is of great significance for improving the ecological environment in urban and rural areas, building a harmonious city, increasing employment, and enhancing economic efficiency. This will be a far-reaching impact on China's economic and social sustainable development. In thi

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30

Achterholt, Sandra, Horst Priefert, and Alexander Steinbüchel. "Purification and Characterization of the Coniferyl Aldehyde Dehydrogenase from Pseudomonas sp. Strain HR199 and Molecular Characterization of the Gene." Journal of Bacteriology 180, no. 17 (1998): 4387–91. http://dx.doi.org/10.1128/jb.180.17.4387-4391.1998.

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ABSTRACT The coniferyl aldehyde dehydrogenase (CALDH) ofPseudomonas sp. strain HR199 (DSM7063), which catalyzes the NAD+-dependent oxidation of coniferyl aldehyde to ferulic acid and which is induced during growth with eugenol as the carbon source, was purified and characterized. The native protein exhibited an apparent molecular mass of 86,000 ± 5,000 Da, and the subunit mass was 49.5 ± 2.5 kDa, indicating an α2 structure of the native enzyme. The optimal oxidation of coniferyl aldehyde to ferulic acid was obtained at a pH of 8.8 and a temperature of 26°C. The Km values for coniferyl aldehyde

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31

Panoutsopoulos, Georgios I., Demetrios Kouretas, and Christine Beedham. "Contribution of Aldehyde Oxidase, Xanthine Oxidase, and Aldehyde Dehydrogenase on the Oxidation of Aromatic Aldehydes." Chemical Research in Toxicology 17, no. 10 (2004): 1368–76. http://dx.doi.org/10.1021/tx030059u.

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32

Wu, Lisha, Shiqiang Yan, and Yinta Li. "Tandem reaction for the synthesis of bicyclic ortho-aminocarbonitrile derivatives using DMAPA as a cheap and efficient catalyst." Journal of Pharmaceutical and Biopharmaceutical Research 2, no. 2 (2020): 145–51. http://dx.doi.org/10.25082/jpbr.2020.02.001.

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To develop a new method for the synthesis of bicyclic ortho-aminocarbonitrile derivatives. Reaction of aromatic aldehydes, cycloketones and malononitrile with catalytic amount of 3-(dimethylamino)- 1-propylamine (DMAPA) in ethanol via Knoevenagel-Michael cascades. The bicyclic ortho-aminocarbonitrile derivatives were obtained with good to excellent yields along with short reaction times. The universality, excellent yields, mild reaction and easy collection through simple filtration indicate the preparation of orthoaminocarbonitriles derivatives is an efficient and suitable protocol, which use

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33

Peng, Xinhua, Hui Zou, Chuanfeng Hu, Kaihao Chen, and Guansheng Xiao. "Cobalt Vanadium Oxide Supported on Reduced Graphene Oxide for the Oxidation of Styrene Derivatives to Aldehydes with Hydrogen Peroxide as Oxidant." Synlett 29, no. 16 (2018): 2181–84. http://dx.doi.org/10.1055/s-0037-1610630.

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Cobalt vanadium oxide supported on reduced graphene oxide showed excellent performance in the oxidation of styrene derivatives to the corresponding aldehydes with hydrogen peroxide as oxidant. An electron-donating group at the para-position of the aromatic ring facilitates the formation of the corresponding aldehyde. Compared with conventional methods, the newly designed heterogeneous catalytic system offers a promising prospect because of its economic applicability and environmental friendliness.

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34

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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35

Killi, Naresh, Julian Bartenbach, and Dirk Kuckling. "Polymeric Networks Containing Amine Derivatives as Organocatalysts for Knoevenagel Reaction within Continuously Driven Microfluidic Reactors." Gels 9, no. 3 (2023): 171. http://dx.doi.org/10.3390/gels9030171.

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The Knoevenagel reaction is a classic reaction in organic chemistry for the formation of C-C bonds. In this study, various catalytic monomers for Knoevenagel reactions were synthesized and polymerized via photolithography to form polymeric gel dots with a composition of 90% catalyst, 9% gelling agent and 1% crosslinker. Furthermore, these gel dots were inserted into a microfluidic reactor (MFR) and the conversion of the reaction using gel dots as catalysts in the MFR for 8 h at room temperature was studied. The gel dots containing primary amines showed a better conversion of about 83–90% with

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Lee, Soon Goo, Kate Harline, Orchid Abar, et al. "The plant pathogen enzyme AldC is a long-chain aliphatic aldehyde dehydrogenase." Journal of Biological Chemistry 295, no. 40 (2020): 13914–26. http://dx.doi.org/10.1074/jbc.ra120.014747.

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Aldehyde dehydrogenases are versatile enzymes that serve a range of biochemical functions. Although traditionally considered metabolic housekeeping enzymes because of their ability to detoxify reactive aldehydes, like those generated from lipid peroxidation damage, the contributions of these enzymes to other biological processes are widespread. For example, the plant pathogen Pseudomonas syringae strain PtoDC3000 uses an indole-3-acetaldehyde dehydrogenase to synthesize the phytohormone indole-3-acetic acid to elude host responses. Here we investigate the biochemical function of AldC from PtoD

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Panoutsopoulos, Georgios I., and Christine Beedham. "Enzymatic oxidation of phthalazine with guinea pig liver aldehyde oxidase and liver slices: inhibition by isovanillin." Acta Biochimica Polonica 51, no. 4 (2004): 943–51. https://doi.org/10.18388/abp.2004_3527.

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The enzymes aldehyde oxidase and xanthine oxidase catalyze the oxidation of a wide range of N-heterocycles and aldehydes. These enzymes are widely known for their role in the metabolism of N-heterocyclic xenobiotics where they provide a protective barrier by aiding in the detoxification of ingested nitrogen-containing heterocycles. Isovanillin has been shown to inhibit the metabolism of aromatic aldehydes by aldehyde oxidase, but its inhibition towards the heterocyclic compounds has not been studied. The present investigation examines the oxidation of phthalazine in the absence and in the pres

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Liu, Xiaozhu, Yinfeng Li, Jichuang Zhou, and Mingzheng Huang. "Effects of co-inoculation and sequential inoculation of Wickerhamomyces anomalus and Saccharomyces cerevisiae on the physicochemical properties and aromatic characteristics of longan (Dimocarpus longan Lour.) wine." Quality Assurance and Safety of Crops & Foods 13, no. 2 (2021): 56–66. http://dx.doi.org/10.15586/qas.v13i2.893.

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Wickerhamomyces anomalus and Saccharomyces cerevisiae were mixed by co-inoculation or sequential inocula-tion, and the physicochemical properties, electronic sensory characteristics, and aromatic characteristics of longan (Dimocarpus longan Lour.) wine were evaluated to analyze the effects of mixed fermentation on wine quality. The results demonstrate that mixed fermentation obtained by co-inoculation or sequential inoculation decreases the alcohol content of longan wine. Furthermore, mixed fermentation also leads to the reduction of the electronic sensory acidity and richness of longan wine.

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Singh, Shailesh, Jyoti Tiwari, Deepali Jaiswal, et al. "Nucleophilic Acylation with Aromatic Aldehydes to 2 Bromoacetonitrile: An Umpolung Strategy for the Synthesis of Active Methylene Compounds." Current Organic Synthesis 17, no. 7 (2020): 518–24. http://dx.doi.org/10.2174/1570179417666200615153536.

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Background: A novel one-pot N-heterocyclic carbene (NHC)-catalysed acylation of 2- bromoacetonitrile with aromatic aldehydes is reported. The protocol involves carbonyl umpolung reactivity of aldehydes in which the carbonyl carbon attacks nucleophilically (as d1 nucleophile) on the electrophilic terminal of 2-bromoacetonitrile to afford 3-aryl-3-oxopropanenitrile. The salient features of this procedure are short reaction time, operational simplicity, ambient temperature, no by-product formation and high yields. Materials and Methods: A flame-dried round bottom flask was charged with Imidazoliu

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Hajimohammadi, Mahdi, Hamid Mofakham, Nasser Safari, and Anahita Mortazavi Manesh. "Highly efficient conversion of aldehydes to carboxylic acid in the presence of platinum porphyrin sensitizers, air and sunlight." Journal of Porphyrins and Phthalocyanines 16, no. 01 (2012): 93–100. http://dx.doi.org/10.1142/s1088424612004483.

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A variety of aromatic and aliphatic aldehydes were oxidized to the corresponding carboxylic acids in the presence of platinum porphyrin, sunlight and air in acetonitrile solvent under mild conditions. Nitrobenzaldehydes were found to be very efficient 1O2 scavengers that quench the formation of acids from any aldehyde in the presence of free-base porphyrin sensitizers. However, nitrobenzaldehydes were converted to the corresponding acids in the presence of platinum porphyrins. The platinum porphyrins are very good and efficient catalysts for a wide range of applications in the aerobic conversi

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Mohammed Farman Ahmed. "Photochemical Stability, Chemical Kinetics, and Electrical Characterization Studies as well as Some Theoretical Studies of Some Cyclic Hydrazones." Journal of Information Systems Engineering and Management 10, no. 32s (2025): 326–38. https://doi.org/10.52783/jisem.v10i32s.5308.

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The kinetic and thermodynamic properties of six Schiff bases (M1-M4) derived from 4-Pyridinecarboxylic acid hydrazide, and various aromatic aldehydes were studied. The aldehyde rings contained both electron-withdrawing and electron-donating substituents, as well as benzaldehyde itself. Hydrolysis kinetics showed minimal variation in rate constant values, with M2 exhibiting the fastest hydrolysis. The effect of pH indicated that acidic and basic environments accelerated the reaction compared to neutral conditions. Temperature dependence revealed low activation energy values for all compounds, i

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Hatvate, Navnath T., Shrikant M. Ghodse, Krishna N. Mundlod, and Vikas N. Telvekar. "Metal-Free Synthesis of Pyrimidinone Derivatives via Biginelli Reaction Using Aqueous NaICl2." Letters in Organic Chemistry 17, no. 8 (2020): 613–17. http://dx.doi.org/10.2174/1570178617666191126095808.

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Metal-free synthesis of pyrimidinone (alky/aryl) via Biginelli reaction in the presence of aqueous sodium dichloroiodate (NaICl2) was studied under reflux conditions. Herein, we first time report the synthesis of the aliphatic Biginelli product by using aliphatic aldehyde, cyclopentane, and urea. Several aromatic and heteroaromatic aldehydes were studied for the confirmation of the wide applicability of aq. NaICl2 for the synthesis of corresponding Biginelli products. The obtained desired products provide good to excellent yield.

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Katsuura, K., and V. Snieckus. "Directed ortho metalation reactions. Convergent synthesis of "angular" anthracyclinones ochromycinone and X-14881 C." Canadian Journal of Chemistry 65, no. 1 (1987): 124–30. http://dx.doi.org/10.1139/v87-020.

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Convergent syntheses of the benz[a]anthraquinone natural products X-14881 C (2c) and ochromycinone (2d) have been achieved using aromatic directed metalation strategies. Key steps involve (a) the condensations of dilithiated cis-tetralol (13a) with the aldehydo o-anisamide 14 and of methoxymethyl protected aldehyde 17b with lithiated o-anisamide (18) to give, after acid-catalyzed cyclization, the phthalide 16, and (b) the regiospeciflc hydroxyselenylation of anthraquinone 22 to provide the hydroxyselenide 23.

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Shatha Abd-alameer Jawad, Zahraa Mushtaq Abd Al-Aama, Khawla lbrahim Abd, and Hanan Qais Saadoun. "Review article the significance applications Schiff rules: Systematic review of the literature." International Journal of Science and Research Archive 14, no. 1 (2025): 1038–42. https://doi.org/10.30574/ijsra.2025.14.1.0205.

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The number of Shaf rules is one of the most important bridge bonds used in coordination chemistry. It has been used in the preparation of a large number of transition elements in particular and in the preparation of complexes with metal ions in general due to its coordination strength and also its ability to form complexes with different bases and different uses., and they are organic compounds containing the azomethine group (C=N-R R2). For the first time in the year (1864), I was the first to discover the process of condensing aliphatic ,aromatic ketones or aldehydes with primary aromatic am

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Tola, Adesola J., Amal Jaballi, Hugo Germain, and Tagnon D. Missihoun. "Recent Development on Plant Aldehyde Dehydrogenase Enzymes and Their Functions in Plant Development and Stress Signaling." Genes 12, no. 1 (2020): 51. http://dx.doi.org/10.3390/genes12010051.

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Abiotic and biotic stresses induce the formation of reactive oxygen species (ROS), which subsequently causes the excessive accumulation of aldehydes in cells. Stress-derived aldehydes are commonly designated as reactive electrophile species (RES) as a result of the presence of an electrophilic α, β-unsaturated carbonyl group. Aldehyde dehydrogenases (ALDHs) are NAD(P)+-dependent enzymes that metabolize a wide range of endogenous and exogenous aliphatic and aromatic aldehyde molecules by oxidizing them to their corresponding carboxylic acids. The ALDH enzymes are found in nearly all organisms,

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Ji, Heng, Hui-qiong Ni, Peng Zhi, et al. "Visible-light mediated directed perfluoroalkylation of hydrazones." Organic & Biomolecular Chemistry 15, no. 28 (2017): 6014–23. http://dx.doi.org/10.1039/c7ob01144j.

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A convenient and efficient protocol was reported to access a series of perfluoroalkylated aromatic aldehyde hydrazones. Aliphatic aldehyde hydrazones and N-monosubstituted hydrazones which are unreactive in previously reported hydrazone perfluoroalkylation reactions now take part in the reaction.

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Alhashimi, Rana T., Tarek A. Ahmed, Lamya Alghanem, et al. "Design, Synthesis, and Antisickling Investigation of a Thiazolidine Prodrug of TD-7 That Prolongs the Duration of Action of Antisickling Aromatic Aldehyde." Pharmaceutics 15, no. 11 (2023): 2547. http://dx.doi.org/10.3390/pharmaceutics15112547.

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The synthetic allosteric effector of hemoglobin, TD-7 has been investigated as a potential therapeutic agent for the treatment of sickle cell disease. The pharmacologic activity of TD-7 is due to formation of a Schiff-base interaction between its aldehyde group and the two N-terminal αVal1 amines of hemoglobin, effectively inhibiting sickling of red blood cells. However, TD-7 faces a challenge in terms of poor oral bioavailability due to rapid in-vivo oxidative metabolism of its aldehyde functional group. To address this shortcoming, researches have explored the use of a L-cysteine ethyl ester

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Pandey, Alok, R. Rajavel, Sandeep Chandraker, and Deepak Dash. "Synthesis of Schiff Bases of 2-amino-5-aryl-1,3,4-thiadiazole and Its Analgesic, Anti-Inflammatory and Anti-Bacterial Activity." E-Journal of Chemistry 9, no. 4 (2012): 2524–31. http://dx.doi.org/10.1155/2012/145028.

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Schiff Bases of 2-amino-5-aryl-1,3,4-thiadiazole derivatives have been synthesized with different aromatic aldehyde. 1,3,4-thiadiazole derivatives were prepared by the reaction of thiosemicarbazide, sodium acetate and aromatic aldehyde. The structures of the titled Schiff bases were elucidated by IR and1H NMR spectral measurements. All the compounds were evaluated for their analgesic activity against swiss albino mice, anti-inflammatory activity against Wister albino rats. The compounds showed significant antibacterial activity againstStaphylococcus aureus(gram-positive) bacteria andE. coli(gr

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Colombo, Sara, Julie Oble, Giovanni Poli, et al. "Doubly Metathetic NiCl2-Catalyzed Coupling Between Bis(2-oxazolines) and Aldehydes: A Novel Access to Bis(ester-imine) Derivatives." Molecules 29, no. 23 (2024): 5756. https://doi.org/10.3390/molecules29235756.

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The coupling between bis(2-oxazolines) and two equivalents of aromatic aldehydes in the presence of catalytic amounts of NiCl2 affords an ester-imine product in synthetically useful yields. This virtually unknown, 100% atom-economic transformation involves the formal metathesis between the C=N double bond of the bis(2-oxazoline) moiety, which undergoes ring-opening, and the C=O double bond of the aldehyde. The scope of this transformation is studied, and a mechanism is proposed based on DFT calculations.

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50

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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