The kinetics of the first part of the reaction between para-substituted benzonitriles and diethylmagnesium have been studied. The rarely isolated intermediate products, the ketimines, have been iso...
Asymmetric Synthesis of Vicinal Tetrasubstituted Diamines via Reductive Coupling of Ketimines Templated by Chiral Diborons
作者:Mingkang Zhou、Yaodong Lin、Xiao‐Xuan Chen、Guangqing Xu、Lung Wa Chung、Wenjun Tang
DOI:10.1002/anie.202300334
日期:——
A series of chiral vicinaltetrasubstituted diamines are prepared with high ee values and good to excellent yields via an unprecedented chiral diboron-templated asymmetric homocoupling of aryl alkyl ketimines. The synthetic value of these chiral vicinaltetrasubstituted diamines is demonstrated by the development of efficient organocatalysts for the asymmetric α-bromination of aliphatic aldehydes.
通过前所未有的手性二硼模板化芳基烷基酮亚胺的不对称自偶联,制备了一系列具有高 ee 值和良好至极佳产率的手性邻位四取代二胺。这些手性邻位四取代二胺的合成价值通过开发用于脂肪醛不对称α-溴化的高效有机催化剂得到证明。
Development of Novel Catalytic Direct Syntheses of N-Unsubstituted Ketimines and Their Applications to One-Pot Reactions
作者:Hiroyuki Morimoto、Takashi Ohshima、Yuta Kondo
DOI:10.1055/a-2131-3448
日期:2024.3
Herein, we summarize our recent efforts toward developing catalytic methods for the synthesis of N-unsubstituted ketimines and their applications to one-pot reactions for producing various nitrogen-containing compounds. This account provides detailed background, optimization, scope, and mechanistic information. We hope this work will stimulate future studies on the implementation of N-unsubstituted