Sc(OTf)3-catalyzed efficient synthesis of β,β-bis(indolyl) ketones by the double indolylation of acetic acid 2-methylene-3-oxobutyl ester
作者:Shengming Ma、Shichao Yu、Zhihua Peng
DOI:10.1039/b503378k
日期:——
In the presence of 5 mol% Sc(OTf)3, double indolylation of acetic acid 2-methylene-3-oxo-butyl ester with differently substituted indoles readily afforded beta,beta-bis(indolyl) ketones. The reaction may proceed via a Sc(OTf)3-catalyzed SN2'-type substitution and subsequent conjugateaddition.