反应详情

In 50 ml of dimethylformamide is dissolved 2 g of the 7-methyl-5H,7H-isoxazolo[3,4-d]pyrimidine-4,6-dione obtained in Example 19, followed by addition of 1.6 g of potassium carbonate and 2 ml of ethyl iodide. Then, the reaction and after-treatment are carried out in the same manner as Example 23 to obtain 0.9 g of the captioned compound as colorless crystals. melting point: 87°-88° C.

1. customThen, the reaction