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。