Coupling between vinyl or aryl iodides and vinyl zinc bromides(either bearing an alkoxy moiety or trisubstituted) under Pd(0) Catalysis
作者:Lydie Labaudinière、Jean-F. Normant
DOI:10.1016/s0040-4039(00)60026-6
日期:1992.10
A tert-butoxy group in allylic or homoallylic position on vinyl zinc bromides does not hinder their coupling with p-iodoanisole under Pd(0) catalysis, as does a methoxy group. Furthermore, use of a polar solvent and of a stoichiometric amount of CuBr greatly enhances the reactivity of a trisubstituted vinylic zinc reagent towards vinyl or aryl iodides under Pd(0) catalysis.
在Pd(0)催化下,乙烯基溴化锌上烯丙基或均烯丙基位置的叔丁氧基不会像对甲氧基一样,阻碍它们与对碘苯甲醚的偶合。此外,在Pd(0)催化下,使用极性溶剂和化学计量的CuBr可以大大提高三取代乙烯基锌试剂对乙烯基碘或芳基碘的反应性。