描述 d'une procedure generale pour la synthese de biphenyles chiraux via取代芳香亲核试剂 d'un groupe o-methoxy par un reactif de Grignard 芳香 avec une oxazoline en tant qu'auxiliaire 手性。联苯外消旋化的测定
Abstract Chromium complexation of a 2,6,2′-trisubstituted biphenylcompound gave four mono-Cr(CO) 3 and one di-Cr(CO) 3complexation products in a variable ratio depending on the reaction conditions. However, cross-coupling of (2,6- disubstituted-1-bromobenzene)Cr(CO) 3 with 2-substituted phenylboronic acid catalyzed by palladium(0) produced a stereoselectively coupled product without the formation
Catalytic Atroposelective Aerobic Oxidation Approaches to Axially Chiral Molecules
作者:Lenin Kumar Verdhi、Asit Ghosh、Natalia Fridman、Alex M. Szpilman
DOI:10.1021/acs.joc.3c00417
日期:2023.7.7
copper and chiral nitroxide co-catalyzed aerobic enantioselective oxidation process has been developed that allows access to axially chiral molecules. Two complementary atroposelective approaches, oxidative kinetic resolution (OKR) and desymmetrization, were studied using ambient air as the stoichiometric terminal oxidant. OKR of rac-N-arylpyrrole alcohols and rac-biaryl alcohols affords the optically