tolerant coupling: The title reaction has been developed to deliver arylamines (see scheme; Bz=benzoyl, dppbz=1,2‐bis(diphenylphosphino)benzene). The catalysis is based on electrophilic, umpolung amination and enables the use of secondary acyclic amines. Various functional groups are tolerated, thus opening up a new substrate class for the Chan–Lam‐type coupling.
Catalytic Transfer Hydrodebenzylation with Low Palladium Loading
作者:Sergey A. Yakukhnov、Valentine P. Ananikov
DOI:10.1002/adsc.201900686
日期:2019.10.22
cleavage of O‐benzyl and N‐benzyl protecting groups was performed using an uncommonly low palladium loading (0.02–0.3 mol%; TON up to 5000) in a relatively short reaction time. The approach was used for a variety of substrates including pharmaceutically important precursors, and gram‐scale deprotection reaction was shown. Transfer conditions together with easy‐to‐make Pd/C catalyst are the key features
A copper-catalyzedelectrophilicamination of aryl[(2-hydroxymethyl)phenyl]dimethylsilanes with O-acylated hydroxylamines has been developed to afford the corresponding anilines in good yields. The catalytic reaction proceeds very smoothly under mild conditions and tolerates a wide range of functional groups.