Jiang Zhaoqin,Yang Hui,Han Xiao,Luo Jie,Wong Ming Wah,Lu Yixin.Direct asymmetric aldol reactions between aldehydes and ketones catalyzed by L-tryptophan in the presence of water. Organic & biomolecular chemistry . 2010Direct asymmetric aldol reactions between aldehydes and ketones catalyzed by L -...
Reactions of aldehydes and ketones: oxidation reduction nucleophilic addition 1) Aldehydes are easily oxidized, ketones are not. 2) Aldehydes are more reactive in nucleophilic additions than ketones. alkane alcohol aldehyde ketone carboxylic acid oxidation reduction reduction addition product nucleophilic ad...
It also highlights applications of amidine-, isothiourea-, and guanidine-based nucleophilic catalysts for a range of reactions of carbonyl compounds. A fluorous chiral organocatalyst promotes the formation of the anti-aldol product on reaction between aromatic aldehydes with ketones in brine. The ...
Aldehydes and ketones undergo a variety of reactions that lead to many different products. The most common reactions are nucleophilic addition reactions, which lead to the formation of alcohols, alkenes, diols, cyanohydrins (RCH(OH)C&tbond;N), and imines R2C&dbond;NR), to mention a few repre...
Although tertiary amines do not react with aldehydes and ketones, and secondary amines react only reversibly, primary amines react readily to formimines(also called azomethines or Schiff bases), R2C=NR′. Substitution Acylationis one of the most important reactions of primary and secondary amines;...
Proline-catalyzed asymmetric aldol reactions between ketones and alpha-unsubstituted aldehydes [reaction: see text] With this communication we extend the methodology of proline-catalyzed direct asymmetric aldol reactions to include alpha-unsubstituted aldehydes as acceptors. This important aldehyde class giv...
Cross-Coupling Reactions betweenα,β-Unsaturated Ketones and Aldehydes with CrCl2: Aldol Condensation and Cyclopropanol FormationAuthor(s): Chika Toratsu, Takafumi Fujii, Takuma Suzuki, Kazuhiko Takai Publication date: 2000 Journal: Angewandte Chemie International Edition...
Aldehydes and ketones exhibit similar chemical properties due to the presence of the carbonyl group. The carbonyl group is polar in nature, which means the shared pair of electrons between carbon and oxygen is more inclined towards oxygen. This is because oxygen being more electronegative than carbo...
We present a stepwise procedure to determine physical properties such as heats of formation, standard entropies, Gibbs free energies of formation, and solvation energies from quantum mechanics (QM), for various short-chain aldehydes and ketones. We show that quantum mechanical gas-phase Gibbs free ...
List, B., et al., " Proline-Catalyzed Asymmetric Aldol reactions between Ketones and alpha-Unsubstituted Aldehydes, " Organic Letters 3:573-575, American Chemical Society (2001).List B,Pojarliev P,Castello C. Proline-catalyzed asymmetric aldol reactions between ketones and α-unsubstituted ...