作者:Wang, Wei、Li, Qiao、Xu, Man、Chen, Jianhui、Xiang, Ruoyao、Luo, Yanshu、Xia, Yuanzhi
DOI:10.1021/acs.orglett.4c01668
日期:——
regiodivergent and stereoselective ring-opening isomerization of vinylcyclopropane was developed with cobalt catalysis. Employing the commercially available Xantphos ligand, the reactions afforded exclusively linear-type 1,3-dienes as the products. Interestingly, when switching the ligand to an amido-diphosphine ligand (PNP), branched-type 1,3-dienes were obtained with high regioselectivity and stereoselectivity
利用钴催化开发了乙烯基环丙烷的配体控制区域发散和立体选择性开环异构化。使用市售的 Xantphos 配体,该反应仅提供直链型 1,3-二烯作为产物。有趣的是,当将配体转换为酰胺基二膦配体(PNP)时,得到了具有高区域选择性和立体选择性的支链型1,3-二烯。初步的机理研究表明,π-烯丙基金属和金属氢化物物质分别作为两个转化中的关键中间体。