The reaction between alkyllithium homocuprates and α,α′-dibromoketones permits the monoalkylation of ketones after hydrolysis of the reaction intermediate; the latter reacts with an excess of alkyl halide and gives the dialkylated product. Four alkylation reactions (methylation, ethylation, isopropylation and t-butylation) of α,α′-dibromoketones have been studied. While monoalkylation leads to secondary/primary
烷基
锂均
铜酸盐与α,α'-二
溴代酮之间的反应使反应中间体
水解后酮单烷基化。后者与过量的烷基卤反应,得到二烷基化产物。研究了α,α′-二
溴酮的四个烷基化反应(甲基化,乙基化,异丙基化和叔丁基化)。虽然单烷基化从双伯和双仲结构产生仲/伯和叔/仲酮,但是二烷基化允许合成双仲和双叔酮。但是,不可能以相同的结构引入两个第三级。