反应详情

4.9 g (0.03 mol) of 6-amino-3,4-dihydro-2H-1,4-benzoxazin-3-one is introduced into 50 ml of dimethylformamide. At 5° C., 0.79 g (0.033 mol) of sodium hydride is added, and the mixture is stirred for 30 minutes at this temperature. Subsequently, 5.9 g (0.033 mol) of 4-bromomethyltetrahydropyran is added, the mixture is stirred for 3 hours at 60° C., 200 ml of water is added, extraction is carried out twice with methylene chloride, followed by drying and evaporation of the solvent under reduced pressure. There is obtained 5 g (64%) of 4-(tetrahydropyran-4-ylmethyl)-6-amino-3,4-dihydro-2H-1,4-benzoxazin-3-one as an oil.

1. stirringthe mixture is stirred for 3 hours at 60° C.
2. extractionextraction
3. customby drying
4. customevaporation of the solvent under reduced pressure