作者:Kyle R. Delgado、Dustin D. Youmans、Steven T. Diver
DOI:10.1021/acs.orglett.9b04594
日期:2020.1.17
A mild and high yielding rearrangement of 1,3-disubstituted-1,3-dienes to 1,1,4-trisubstituted-1,3-dienes using a cobaloxime catalyst and a silane cocatalyst is reported. Chiral centers near the conjugated diene were not racemized. Deuterium labeling studies are consistent with a hydrogen atom transfer mechanism, and radical intermediates were found to be accessible due to the observed ring opening
据报道,使用钴肟肟催化剂和硅烷助催化剂将1,3-二取代-1,3-二烯温和高产重排为1,1,4-三取代-1,3-二烯。共轭二烯附近的手性中心未消旋。氘标记研究与氢原子转移机理一致,并且由于观察到环丙烷环的开环,发现自由基中间体是可及的。