A novel copper-mediated or transition-metal-free alkylation of gem-dibromoalkenes with tertiary, secondary and primary alkyl Grignard reagents was described. The outcomes of these reactions were found to be highly dependent on the reaction conditions and the type of Grignard reagents used. Specifically, the tertiary alkylation of gem-dibromoalkenes proceeded efficiently in the presence of 50 mol% CuCN
描述了用叔,仲和伯烷基
格氏试剂对宝石-二
溴烯烃进行新型的
铜介导或无过渡
金属的烷基化。发现这些反应的结果高度依赖于反应条件和所用
格氏试剂的类型。具体地说,在50mol%的CuCN存在下或在无过渡
金属的条件下,宝石-二
溴烯烃的叔烷基化有效地进行,从而以高收率提供了叔烷基取代的单
溴烯烃或烯烃。