On the regiochemistry of cyclialkylation of regiodefined 4-halo-1-alkenylmetals producing cyclobutenes
作者:Fang Liu、Ei-ichi Negishi
DOI:10.1016/s0040-4039(97)00011-7
日期:1997.2
combination of recently developed anti-carbometallation of homopropargyl alcohols and cyclialkylation of 4-halo-1-alkenyllithiums of appropriate stereochemistry and regiochemistry provides, for the first time, a regiospecific procedure for the synthesis of regiodefined cyclobutenes presumably via σ-type cyclialkylation, whereas carboalumination of 4-halo-1-alkynylmetals containing Si or Al leads to regioconvergent
最近开发的高炔丙醇的抗羰基金属化与适当的立体化学和区域化学的4-卤代-1烯基锂的环烷基化的结合,首次提供了一种区域特异性的方法,大概可以通过σ型环烷基化合成区域限定的环丁烯,而含有Si或Al的4-卤-1-炔金属的碳铝化导致区域会聚的环丁烯形成。