Metal-Free Insertion of Sulfoxonium Ylides into Arylamines in Water
作者:Mei Guan、Yong Wu、Hua He、Kaichuan Yan、Jianglian Li、Ruizhi Lai、Yi Luo
DOI:10.1055/s-0040-1707186
日期:——
bond formation in recent years. However, the existing methods suffer from unstable starting materials, expensive metal catalysts and organic solvents. Herein, insertion of sulfoxonium ylides into arylamines under metal-free conditions has been developed. The method employs water as solvent at mild temperature and is amenable to the late-stage modification of structurally complex bioactive compounds
Chiral Brønsted Acid-Catalyzed Metal-Free Asymmetric Direct Reductive Amination Using 1-Hydrosilatrane
作者:Vladislav Skrypai、Sami E. Varjosaari、Fawwaz Azam、Thomas M. Gilbert、Marc J. Adler
DOI:10.1021/acs.joc.8b03073
日期:2019.5.3
The asymmetric direct reductive amination of prochiral ketones with aryl amines using 1-hydrosilatrane with a chiral Brønsted acid catalyst is reported. This is the first known example of chiral Brønsted acid-catalyzed asymmetric reductive amination using a silane as the hydride source. The reaction features a highly practical reducing reagent and proceeds efficiently at room temperature without a