We herein report a novel and more practical approach to prepare gem-dibromoenones from terminal alkynes, tetrabromomethane (CBr4), and water in a single step. Mechanistic studies reveal that the generation of a tribromomethyl radical with the assistance of a persulfate salt (K2S2O8) is essential to this transformation. The reaction features readily available chemicals, a broad substrate scope, a green
本文我们报告一个新的和更实际的方法来制备宝石从末端
炔烃,四
溴甲烷(CBR -dibromoenones 4在单个步骤中),和
水。机理研究表明,在过
硫酸盐(K 2 S 2 O 8)的帮助下生成三
溴甲基自由基对于这种转化是必不可少的。该反应具有易得的
化学品、广泛的底物范围、绿色溶剂和温和的反应条件,为构建卤素取代的烯酮提供了有效的替代方案。