反应详情

The synthesis method of Example 55 was applied. The compound (1.49 g) obtained in Example 29 and diethoxymethyl acetate (12 ml) were used as reagents. The mixture was reacted at 75° C. for 2 hours to give 1.39 g of white crystals (yield 88%). The crystals were subjected to recrystallization from acetone to give white crystals.

1. customThe synthesis method of Example 55
2. customThe mixture was reacted at 75° C. for 2 hours