α-ALKYLATION AND α-ARYLATION OF CARBONYL GROUPS: NICKEL-PHOSPHINE COMPLEX-CATALYZED GRIGNARD COUPLING OF<i>vic</i>-BROMOTRIMETHYLSILOXYALKENES
作者:Kohei Tamao、Michio Zembayashi、Makoto Kumada
DOI:10.1246/cl.1976.1239
日期:1976.11.5
In the presence of [Ni(dppp)Cl2] as a catalyst, vic-bromotrimethylsiloxyalkenes (1)couple with Grignard reagents to produce alkylated and arylated silyl enol ethers, or, after acid hydrolysis, the corresponding α-alkylated and α-arylated carbonyl compounds. In these reactions, 1 can be regarded as an enolonium equivalent.
在[Ni(dppp)Cl2]作为催化剂的存在下,vic-溴三甲基硅氧基烯烃(1)与格氏试剂耦合,生成烷基化和芳基化的硅烯醇醚,或者在酸水解后,得到相应的α-烷基化和α-芳基化的羰基化合物。在这些反应中,1可以看作是一种烯醇盐类的等效物。