demonstrated for the first time that a sulfide catalyst, utilised at 20 mol% loading, can promote methylene transfer to ketones in the presence of methyl triflate and an organic base. This metal-free methodology is of broad scope – both aliphatic and aromatic ketones (including trifluoromethyl ketones) can be converted to synthetically useful terminal epoxides in excellent yields at room temperature.
首次证明,在三
氟甲磺酸甲酯和有机碱的存在下,以20摩尔%的载量使用的
硫化物催化剂可促进亚甲基向酮的转移。这种无
金属的方法具有广泛的应用范围-脂肪族和
芳香族酮(包括三
氟甲基酮)都可以在室温下以优异的产率转化为合成有用的末端
环氧化物。