Addition of kinetic boron enolates generated from β-alkoxy methyl ketones to aldehydes. Density functional theory calculations on the transition structures
作者:Luiz C. Dias、Sávio M. Pinheiro、Vanda M. de Oliveira、Marco A.B. Ferreira、Cláudio F. Tormena、Andrea M. Aguilar、Julio Zukerman-Schpector、Edward R.T. Tiekink
DOI:10.1016/j.tet.2009.08.042
日期:2009.10
of 1,5-anti stereoinduction are obtained in boron enolate aldol reactions of 1,2-syn β-alkoxy methyl ketones with achiral aldehydes, when the β-alkoxy protecting group is part of a benzylidene acetal. We have also investigated the effects of the ligands on boron, the α-, β-, and γ-substituents and the β-alkoxy protecting group on the boron enolates, using density functional theory (B3LYP) and Møller–Plesset