Tandem Acyl Substitution/Michael Addition of Thioesters with Vinylmagnesium Bromide
作者:Vera Hirschbeck、Marlene Böldl、Paul H. Gehrtz、Ivana Fleischer
DOI:10.1021/acs.orglett.9b00538
日期:2019.4.19
A tandem reaction of thioesters with vinylmagnesium bromide is reported. The initial acylsubstitution provides an α,β-unsaturated ketone which further reacts with the liberated thiolate. This transition-metal-free synthesis of β-sulfanyl ketones takes place under mild reaction conditions, whereas the addition of a second Grignard molecule is almost completely suppressed. The carefully chosen parameters