Only oxygen and acid! The oxidative coupling of xanthene and other activated benzylic compounds with carbon nucleophiles such as ketones, can be performed under ambient conditions without solvent by simply using oxygen and catalytic amounts of methanesulfonic acid. The proposed reaction mechanism involves substrate activation by formation of hydroperoxides; the method can therefore be regarded as an
只有
氧气和酸!an吨和其他活化的苄基化合物与碳亲核试剂(如酮)的氧化偶联可在环境条件下,无需溶剂,只需使用
氧气和催化量的
甲磺酸即可进行。拟议的反应机理涉及通过氢过氧化物的形成来活化底物。因此,该方法可被视为“自氧化偶联反应”。