Here we report the surprising discovery that high-energy vinyl carbocations can be generated under strongly basic conditions, and that they engage in intramolecular sp3 C-H insertion reactions through the catalysis of weakly coordinating anion salts. This approach relies on the unconventional combination of lithium hexamethyldisilazide base and the commercially available catalyst, triphenylmethylium
在这里,我们报告了一个令人惊讶的发现,即高能
乙烯基碳阳离子可以在强碱性条件下产生,并且它们通过弱配位阴离子盐的催化参与分子内 sp3 C-H 插入反应。这种方法依赖于六甲基二
硅氮化锂碱和市售催化剂四苯甲基
铵(
五氟苯基)
硼酸盐的非常规组合。这些试剂形成一种具有催化活性的
锂物质,能够将
乙烯基阳离子 C-H 插入反应应用于含杂原子的底物。