Mechanistic investigations of alcohol silylation with isothiourea catalysts
作者:Brandon K. Redden、Robert W. Clark、Ziyuan Gong、Md. Mamdudur Rahman、Dmitry V. Peryshkov、Sheryl L. Wiskur
DOI:10.1039/d1ob01732b
日期:——
mechanism of the asymmetric silylation of alcohols with isothiourea catalysts was studied by employing reaction progress kinetic analysis. These reactions were developed by the Wiskur group, and use triphenyl silyl chloride and chiral isothiourea catalysts to silylate the alcohols. While the order of most reaction components was as expected (catalyst, amine base, alcohol), the silyl chloride was determined
Obtaining Enriched Compounds via a Tandem Enantioselective Reaction and Kinetic Resolution Polishing Sequence
作者:Maggie I. Klauck、Sachin G. Patel、Sheryl L. Wiskur
DOI:10.1021/jo202653b
日期:2012.4.6
tandem method of coupling an enantioselective reaction with a nonenzymatic kinetic resolution to prepare highly enantioenriched compounds. The procedure employs a moderately selective enantioselective reaction on a ketone or aldehyde to form an enriched alcohol followed by a kinetic resolution of the alcohol to generate ee’s of >99% in yields greater than what is possible with a kinetic resolution. This