with alkynes tethered to dienes has been developed. A broad range of unsaturated substrates participate in the sequence, and stereoselectivities are generally excellent. Stereochemical studies provided evidence for a mechanism that involves the [3,3] sigmatropic rearrangement of divinylcyclopropanes.
已开发出一种新的
镍催化过程,用于(三甲基甲
硅烷基)
重氮甲烷与连接在二烯上的
炔烃的 [4+2+1] 环加成反应。广泛的不饱和底物参与该序列,立体选择性通常非常好。立体
化学研究为涉及二
乙烯基环丙烷 [3,3] σ 重排的机制提供了证据。