The title compounds 3 are prepared, in good yields, by methylene blue photosensitized oxidation of furans 1 in acetone and thermal conversion of the solutions of the intermediate endo- 2,5-peroxides 2.
通过在
丙酮中对
呋喃 1 进行
亚甲基蓝光敏氧化,并对中间体内型 2,5-过氧化物 2 的溶液进行热转化,以良好的收率制备了标题化合物 3。