在
tin (IV) chloride pentahydrate 、 sodiumsulfide nonahydrate 作用下,
以
甲苯 为溶剂,
生成
5-methyl-2-oxo-N-phenyltetrahydrofuran-3-carboxamide 、 (3S,5S)-5-methyl-2-oxo-N-phenyltetrahydrothiophene-3-carboxamide 、 (3S,5R)-5-methyl-2-oxo-N-phenyltetrahydrothiophene-3-carboxamide