Manganese-Catalyzed Asymmetric Oxidation of Methylene C–H of Spirocyclic Oxindoles and Dihydroquinolinones with Hydrogen Peroxide
作者:Bin Qiu、Daqian Xu、Qiangsheng Sun、Jin Lin、Wei Sun
DOI:10.1021/acs.orglett.8b03652
日期:2019.2.1
A highly efficient strategy for the enantioselective oxidation of methylene C–H of spirocyclic oxindoles and dihydroquinolinones has been established, in which an earth-abundant manganese catalyst and hydrogen peroxide are used. Noteworthy, the manganese catalyst can be applied to the asymmetric hydroxylation of spirocyclic 2,3-dihydroquinolin-4-ones with 94–99% ee.
已经建立了一种高效的策略,用于螺环化的羟吲哚和二氢喹啉酮的亚甲基CHH的对映选择性氧化,其中使用了富含地球的锰催化剂和过氧化氢。值得注意的是,锰催化剂可用于ee为94-99%的螺环2,3-二氢喹啉-4-酮的不对称羟基化反应。