Two-Step Kinetic Resolution of Racemic Secondary Benzylic Alcohols Using the Combination of Enantioselective Silylation and Acylation: One-Pot Procedure Catalyzed by Chiral Guanidine
作者:Kanako Miyazaki、Kenya Nakata
DOI:10.1021/acs.joc.2c01129
日期:2022.8.5
A novel two-step kinetic resolution of racemicsecondary benzylic alcohols with practical enantiomeric ratios was achieved. The reactions were carried out via a one-pot operation by combining enantioselective silylation and acylation mediated by the same chiral guanidine catalyst.
Design, Synthesis, and Evaluation of a Helicenoidal DMAP Lewis Base Catalyst
作者:Matthew R. Crittall、Henry S. Rzepa、David R. Carbery
DOI:10.1021/ol2001705
日期:2011.3.4
The design, synthesis, and study of a helical dialkylaminopyridine Lewis base catalyst is reported. Helical DMAP analogue 4 is based upon a helicenoid structure and displays good to excellent levels of selectivity (S <= 116) in the kinetic resolution of chiral secondary alcohols. Catalyst 4 displays excellent reactivity with exceptionally low loadings of 0.05 mol % effecting practical levels of selectivity in kinetic resolutions.