2-(4,4-dimethyl-5-oxotetrahydrofuran-2-yl)ethyl 4-methylbenzenesulfonate 、
5-(2-hydroxyethyl)-3,3-diphenyldihydrofuran-2(3H)-one 、 5-(2-hydroxyethyl)-3,3-dimethyldihydrofuran-2-one 生成 2-(5-oxo-4,4-diphenyltetrahydrofuran-2-yl)ethyl 4-methylbenzenesulfonate