On treatment with tellurium tetrachloride in dichloromethane at room temperature, 1,3-dithiolanes and 1,3-oxathiolanes undergo smooth ring expansion to give dihydro-1,4-dithiin and dihydro-1,4-oxathiin derivatives respectively in good to moderate yields.
在室温下使用
氯化四
碲 treatment,1,3-二噻环烷和1,3-氧噻环烷在
二氯甲烷中平滑地环扩展,分别得到二氢-1,4-二噻并和二氢-1,4-氧噻并,产率从良好到适中。