Conjugate addition of α-nitrosulfones to vinyl ketones in the presence of 0.2 mol% of a quinineâsquaramide organocatalyst afforded α-nitro-δ-ketosulfones possessing a tetrasubstituted chiral center in excellent yield and enantioselectivity in most cases. This strategy also offers a facile and convenient entry into γ-sulfonylhydroxamates that are one carbon homologs of potent enzyme inhibitors.
在0.2 mol%的
奎宁-方形酰胺有机催化剂存在下,对
乙烯酮的共轭加成反应生成α-硝基-δ-酮基亚磺酰基化合物,这些化合物在大多数情况下具有优异的产率和优良的对映体选择性,同时还提供了一种简便的途径进入γ-磺酰基
羟胺,这是一种强效酶
抑制剂的一个碳同分异构体。