反应详情

The process is carried out according to the procedure described in stage g of Example 1, using 5 g of 4,4-dimethylimidazolidin-2-ylideneamine hydrobromide, 4 ml of diethyl malonate and 2.8 g of sodium methoxide. 4.5 g of 7-hydroxy-2,2-dimethyl-2,3-dihydro-1H-imidazo[1,2-a]pyrimidin-5-one are thus obtained in the form of a white solid.