Influence of β-Substituents in Aldol Reactions of Boron Enolates of β-Alkoxy Methylketones
作者:Luiz C. Dias、Emílio C. de Lucca、Marco A. B. Ferreira、Danilo C. Garcia、Cláudio F. Tormena
DOI:10.1021/ol102303p
日期:2010.11.5
the boron-mediated aldolreactions of β-tert-butyl methylketones with achiral aldehydes, independent of the nature of the β-alkoxy protecting group (P = PMB or TBS). The analysis of the relative energies of the transitionstructures by theoretical calculations using the density functional B3LYP shows relative energies favoring the corresponding OUT-1,5-SYN transitionstructures, explaining the observed