反应详情

Commercially available dihydro-2H-pyran-4(3H)-one (Aldrich), pyrrolidine (Aldrich), p-toluenesulfonic acid monohydrate (Aldrich) sulfur (Aldrich) and cyanamide (Aldrich) were processed using the method described in Example 240A to afford the title compound. MS (ESI+) m/z 157 (M+H)+.