Synthesis of Carboxamides by LDA-Catalyzed Haller−Bauer and Cannizzaro Reactions
作者:Kazuaki Ishihara、Takayuki Yano
DOI:10.1021/ol0494459
日期:2004.6.1
direct synthesis of N-alkylcarboxamides and N,N-dialkylcarboxamides by Haller-Bauer (HB) and Cannizzaro-type reactions has been realized. LithiumN,N-diisopropylamide (LDA) catalyst was successfully used in not only the HB reaction of benzylic ketones with lithium N-alkylamides to give the corresponding carboxamides and hydrocarbons but also in the Cannizzaro-type reaction of aldehydes with lithium N-alkylamides
Trichloro- and methyldichlorogermyl monochelates and dibromo- and dichlorogermyl bischelates derived from N,N-disubstituted amides of 2-hydroxycarboxylic acids
作者:D. V. Airapetyan、T. P. Murasheva、S. Yu. Bylikin、A. A. Korlyukov、A. G. Shipov、S. V. Gruener、E. P. Kramarova、Vad. V. Negrebetskii、S. A. Pogozhikh、G. Ya. Zueva、M. Yu. Antipin、Yu. I. Baukov
DOI:10.1007/s11172-012-0093-7
日期:2012.3
The reactions of GeCl4, GeBr4, and MeGeCl3 with O-trimethylsilyl derivatives of N,N-disubstitutedamides of 2-hydroxycarboxylic acids afforded pentacoordinate and hexacoordinate neutral (O,O)-mono- and (O,O)-bischelates. The reactions of glycolic acid derivatives with GeX4 produced bischelates X2Ge[OCH2C(O)NR2R3]27a,c,d (X = Cl, R2 = R3 = Me (a), (CH2)5 (c), (CH2CH2)2O (d)) and 8a (X = Br). By contrast
5-<i>endo-dig</i>
Cyclization of O-Propargyl Mandelic Acid Amides towards 2,5-Dihydrofurans
作者:Lilia Ben Gaied、Nicolas Fincias、Julian Garrec、Laurent El Kaïm
DOI:10.1002/ejoc.201901397
日期:2019.12.19
5‐endo‐dig cyclization of O‐propargyloxyamides in the presence of tert‐butylate affords 2,5‐dihydrofurans. The mechanism of the reaction was studied by using DFT calculations and the results were compared with the behavior of analogous N‐propargylamide derivatives.
Biocatalytic reduction of α-keto amides to (R)-α-hydroxy amides using Candida parapsilosis ATCC 7330
作者:Selvaraj Stella、Anju Chadha
DOI:10.1016/j.cattod.2012.03.081
日期:2012.12
Biocatalytic reduction of primary and secondary alpha-keto amides was accomplished using whole cells of Candida parapsilosis ATCC 7330. The primary (R)-alpha-hydroxy amides were obtained in good enantiomeric excess (up to 94%) and conversion (88-99%) as compared to the secondary (R)-alpha-hydroxy amides. (C) 2012 Elsevier B.V. All rights reserved.