Highly Efficient Asymmetric Michael Addition Reaction of Malonates to α,β-Unsaturated Ketones Promoted by a Chiral Thiourea/PPY Dual-Catalyst System
作者:Hiyoshizo Kotsuki、Maya Moritaka、Naomu Miyamae、Keiji Nakano、Yoshiyasu Ichikawa
DOI:10.1055/s-0032-1317317
日期:——
The enantioselective Michael addition reaction of malonates to α,β-unsaturated ketones is efficiently promoted by a combined dual-catalyst system composed of chiral thiourea and 4-pyrrolidinopyridine (PPY) in toluene. The expected Michael adducts with cyclic and acyclic enones are obtained in excellent yields and with excellent enantioselectivities.
由手性硫脲和 4-吡咯烷吡啶 (PPY) 在甲苯中组成的组合双催化剂体系有效地促进了丙二酸酯与 α,β-不饱和酮的对映选择性迈克尔加成反应。预期的具有环状和无环烯酮的迈克尔加合物以优异的产率和优异的对映选择性获得。