Ru(II)–Pheox-Catalyzed Asymmetric Intramolecular Cyclopropanation of Electron-Deficient Olefins
作者:Yoko Nakagawa、Soda Chanthamath、Kazutaka Shibatomi、Seiji Iwasa
DOI:10.1021/acs.orglett.5b01201
日期:2015.6.5
The first highly enantioselective intramolecular cyclopropanation of electron-deficient olefins, in the presence of Ru(II)–-Pheox catalyst, is reported. The corresponding cyclopropane-fused γ-lactones were obtained in high yields (up to 99%) with excellent enantioselectivities (ee up to 99%). Moreover, this method enables efficient access to enantioenriched dicarbonyl cyclopropane derivatives, which
据报道,在Ru(II)-Pheox催化剂存在下,电子缺陷性烯烃的首次高对映选择性分子内环丙烷化反应。以高产率(高达99%)和优异的对映选择性(ee高达99%)获得了相应的环丙烷稠合的γ-内酯。而且,该方法使得能够有效地获得对映体富集的二羰基环丙烷衍生物,其是合成各种生物活性化合物的重要中间体。