Highly Enantioselective Synthesis of Sultams via Pd-Catalyzed Hydrogenation
作者:Chang-Bin Yu、Da-Wei Wang、Yong-Gui Zhou
DOI:10.1021/jo900790k
日期:2009.8.7
Using pd(cf3co2)2/(S,S)-f-Binaphane as the catalyst, an efficient enantioselective synthesis of sultams was developed via asymmetric hydrogenation of the corresponding cyclic imines with high enantioselectivities. The hydrogenation products can be conveniently transformed to chiral homoallylic amines without loss of enantioselectivity.
以pd(cf 3 co 2)2 /(S,S)-f-Binaphane为催化剂,通过高对映选择性的相应环状亚胺的不对称加氢反应,开发了有效的对映异构体。氢化产物可以方便地转化为手性均烯丙基胺,而不会损失对映选择性。
Synthesis of chiral γ -sultams through intramolecular reductive amination with sulfonylcarbamate as N- source
An efficient and enantioselective palladium-catalyzed intramolecular asymmetric reductive amination with sulfonylcarbamates as N-sources was reported, providing a facile and general access to the chiral gamma-sultam derivatives with up to 97% of enantioselectivity. This tandem process avoids additional deprotection manipulation and arduous isolation of the N-sulfonyl-imine intermediates. (C) 2017 Elsevier Ltd. All rights reserved.
Divergent C−H Amidations and Imidations by Tuning Electrochemical Reaction Potentials
作者:Isaac Choi、Michael J. Trenerry、Ken S. Lee、Nicholas King、John F. Berry、Jennifer M. Schomaker
DOI:10.1002/cssc.202201662
日期:2022.12.7
Dialing selectivity: Divergent formation of cyclic amines or imines is accomplished by the electrochemically tunable method of applying different reactionpotentials. Potentiodynamic electrochemical studies accompanied by experimental mechanistic investigation shed light on selectivity and atom economy through paired electrolysis, and the reaction shows ample scope and post-metallaelectrocatalysis