An approach to bufadienolides from deoxycholic acid. Reactions of a steroidal αβ-unsaturated aldehyde with some O-silylated ketene acetals
作者:Hans-Wolfgang Hoppe、Blanda Stammen、Ulrich Werner、Hermannn Stein、Peter Welzel
DOI:10.1016/s0040-4020(01)89231-0
日期:1989.1
Reactions of the α,β-unsaturated aldehyde 1 with the O-silyl ketene acetals 10 have been investigated. Both Michael addition and [4+2] cycloaddition products were formed, depending on the reaction conditions.
已经研究了α,β-不饱和醛1与O-甲硅烷基烯酮缩醛10的反应。取决于反应条件,形成了迈克尔加成产物和[4 + 2]环加成产物。