The Role of β-Bulky Substituents in Aldol Reactions of Boron Enolates of Methylketones with Aldehydes: Experimental and Theoretical Studies by DFT Analysis
作者:Luiz C. Dias、Emílio C. de Lucca、Marco A. B. Ferreira、Danilo C. Garcia、Cláudio F. Tormena
DOI:10.1021/jo2023119
日期:2012.2.17
5-stereoselectivities of aldolreactions of boronenolates generated from β-alkoxy methylketones with aldehydes. Excellent levels of 1,5-syn stereoinduction were obtained when the β-protecting group is a silicon ether. This remarkable selectivity is attributed to the volume of the β-bulky substituent of the corresponding boronenolate. We have investigated a stereochemical model using DFT analysis to