反应详情

This compound was prepared from 5-methyl-1H-thieno[2,3-d][1,3]oxazine-2,4-dione (57) by applying the same method as described for the preparation of 1-benzyl-1H-thieno[2,3-d][1,3]oxazine-2,4-dione (58). Yield 4.2 g (56%); MP 183° C. 1H-NMR (DMSO-d6) δ 2.31 (s, 3H), 5.10 (s, 2H), 6.85 (s, 1H), 7.37 (m, 5H) ppm; EIMS m/z 274 (M+1).