Sterically controlled synthesis of optically active organic compounds. V. Sterically controlled synthesis of optically active .alpha.-amino acids from .alpha.-oxo acids by reductive amination
Selective amidation by a photocatalyzed umpolung reaction
作者:Debasish Ghosh、Rajesh Nandi、Saikat Khamarui、Sukla Ghosh、Dilip K. Maiti
DOI:10.1039/c9cc01079c
日期:——
Herein, a metal-catalyzed organic transformation merged with another organophotocatalyst has been developed under mild conditions for the production of α-ketoamides.
在此,已经开发了一种金属催化的有机转化,与另一种有机光催化剂在温和条件下结合,用于生产α-酮酰胺。
A novel approach for the one-pot preparation of α-ketoamides by anodic oxidation
作者:Zhenlei Zhang、Jihu Su、Zhenggen Zha、Zhiyong Wang
DOI:10.1039/c3cc43685c
日期:——
The direct oxidative synthesis of α-ketoamides via anodic oxidation was developed by using dioxygen as a reactant under mild conditions. This methodology has a broad substrate scope (aromatic amines, aliphatic amines and ammonium acetate) and opens up an interesting and attractive avenue for the synthesis of α-ketoamide derivatives.
The stereoselective reduction of alpha -keto esters/alpha -keto amides, which have various chiral auxiliaries using SmI2, is examined. 2(S)-Methoxymethylpyrrolidine, 1,1,2(S)- and 1,1,2(R)-triphenylethanediol were found to be suitable chiral auxiliaries that produced the corresponding alpha -hydroxy ester and amide in good diastereoselectivity with satisfactory yields. Allylation, the Reformatsky-type reaction, and the ketyl-alkene coupling reaction with the 1,1,2(R)-triphenylethanediol and 2(S)-methoxymethylpyrrolidine, derivative of the alpha -keto ester/amide proceeded smoothly with high diastereoselectivity. (C) 2001 Elsevier Science Ltd. All rights reserved.
Takeuchi, Yoshio; Itoh, Noriaki; Note, Hiroshi, Journal of the American Chemical Society, 1991, vol. 113, # 16, p. 6318 - 6320