The catalytic asymmetric aldol reaction of aldehydes with unsubstituted and monosubstituted silyl ketene acetals: formation of anti-β-hydroxy-α-methyl esters
作者:Emma R. Parmee、Yaping Hong、Orin Tempkin、Satoru Masamune
DOI:10.1016/s0040-4039(00)91717-9
日期:1992.3
The title reaction with unsubstituted and monosubstituted silyl ketene acetals proceeds with high enantioselectivity, and in the latter case good diastereoselectivity favoring the anti-β-hydroxy-α-methyl esters in all reported cases.
Mechanism and Conditions for Highly Enantioselective Epoxidation of α,β-Enones Using Charge-Accelerated Catalysis by a Rigid Quaternary Ammonium Salt
作者:E. J. Corey、Fu-Yao Zhang
DOI:10.1021/ol990964z
日期:1999.10.1
[GRAPHICS]Highly enantioselective (up to 130:1) epoxidation of a variety of alpha,beta-enones to form alpha,beta-epoxy ketones is described along with a rational analysis of the mechanistic basis for this strong absolute stereochemical control by the chiral catalyst 2.