Copper‐catalyzed bond scission of pentafluorobutane‐1,3‐diones generates difluoroenolates that react with aldehydes to give a wide range of chiral α,α‐difluoro‐β‐hydroxy ketones within a few hours in up to 99 % yield and 92 % ee. The synthetic utility of this reaction is demonstrated with the stereoselective synthesis of a chiral anti‐1,3‐diol exhibiting a central difluoromethylene unit and efficient
铜催化的五
氟丁烷-1,3-二酮的键断裂产生二
氟烯酸酯,该二
氟烯酸酯与醛反应,在数小时内产生多种手性α,α-二
氟-β-羟基酮,收率高达99%,ee达92% 。该反应的合成效用通过手性抗-1,3
-二醇的立体选择性合成得到证实,该手性抗-1,3
-二醇具有中心二
氟亚甲基单元并能有效转化为2,2-二
氟-3-羟基
羧酸。