作者:Youssef L. Bennani、C.-K. Hwang、Stacie S. Canan Koch、Kristin S. Marron、Laura J. Dar-ti、Beth-Ann Badea、Alex M. Nadzan
DOI:10.1016/0040-4039(96)01885-0
日期:1996.11
bicyclic and tricyclic ketones with lithium ethynyl acetylide, followed by the addition of a catalytic amount of CSA or p-TSA, affords the corresponding exocyclic olefinic ester in good yields, and geometric ratios up to 13:1 favoring the cis olefin. This procedure represents an addition to the repertoire of olefination methods and can readily be extended to other cyclic and acyclic systems.
用乙炔基乙炔化锂处理双环和三环酮,然后加入催化量的CSA或p-TSA,可得到高产率的相应环外烯烃酯,且几何比高达13:1,有利于顺式烯烃。该方法是对烯烃化方法的补充,可以很容易地扩展到其他环状和非环状体系。