An enantioselective Michael addition of ketones to alkylidenemalononitriles catalyzed by chiral primary amine I with (R)-5c as a co-catalyst in good yields (>90%) and with good enantioselectivities (85–96% ee) has been developed. The strategy has also been extended to a three-component version through a domino Knoevenagel/Michael sequence with similar or better outcomes.
已经开发了一种由手性一级胺I催化的酮与烷基
二烯丙基马隆腈的对映选择性Michael加成反应,使用(R)-5c作为共同催化剂,反应产率良好(>90%)且对映选择性良好(85-96% ee)。该策略还通过多米诺Knoevenagel/Michael序列扩展到了三组分版本,获得了类似或更好的结果。