By utilising a chiral bicyclic guanidine as catalyst and triethylamine as additive, the first asymmetric Michael addition of α-fluoro-β-ketoesters to various cyclic enones has been successfully developed, affording a variety of Michael adducts with potential synthetic utilities with satisfactory stereoselectivity (up to 94 % ee and 4.3 : 1 dr).
通过使用手性双环
胍作为催化剂和
三乙胺作为添加剂,已经成功开发了α-
氟-β-
酮酸酯向各种环状烯酮的首次不对称迈克尔加成反应,从而提供了具有潜在合成实用性和令人满意的立体选择性的多种迈克尔加成物。到94%ee和4.3:1 dr)。