The palladium catalysed cyclisation of aryl iodides onto proximal allenes occurs at the centre carbon atom of the allene forming a five- or six-membered rings and generating a Ï-allyl intermediate. The regiochemistry of attack of secondary amines on the Ï-allyl intermediate is sensitive to added inorganic base, steric effects and the nature of the adjacent heteroatom.
在
钯催化下,芳基
碘化物与近端烯烃发生环化反应,在烯烃的中心碳原子上形成五元环或六元环,并生成Ï-烯丙基中间体。仲胺对Ï-烯丙基中间体攻击的区域
化学反应对添加的
无机碱、立体效应和相邻杂原子的性质非常敏感。