Strategy for Catalytic Chemoselective Cross-Enolate Coupling Reaction via a Transient Homocoupling Dimer
作者:Takafumi Tanaka、Tsukushi Tanaka、Taro Tsuji、Ryo Yazaki、Takashi Ohshima
DOI:10.1021/acs.orglett.8b01313
日期:2018.6.15
A new strategy, a transient homocoupling dimer strategy, for direct catalytic oxidative cross-enolate coupling reactions is developed. Cross-enolate coupling products bearing a (contiguous) tetrasubstituted carbon center were obtained chemoselectively without the need for stoichiometric amounts of strong bases/metal oxidants, and thus, the present catalysis provides a general method for the synthesis
提出了一种新的策略,即瞬时均相偶合二聚体策略,用于直接催化氧化交叉烯醇盐偶联反应。不需要化学计量的强碱/金属氧化剂,就可以化学选择性地获得带有(连续)四取代碳中心的烯醇式偶联产物,因此,本发明的催化剂提供了一种合成非天然α,α-二取代氨基的一般方法酸性图案。a内酯和2-酰基咪唑单元的独特转化突出了本催化的合成效用。