反应详情

温度

140 °C

To 6,7-difluoro-3-(4-nitrophenyl)-2,3-dihydrobenzo[e][1,3]oxazin-4-one (0.05 g, 0.16 mmol) in dimethyl sulfoxide (0.5 ml) was added methyl amine (0.3 ml, 2M solution in tetrahydrofuran) and the reaction heated to 140° C. for 1 hr. Water was added and product extracted with ethyl acetate, dried over anhydrous sodium sulfate and concentrated to give 0.42 mg (81%) of 6-fluoro-7-(methylamino)-3-(4-nitrophenyl)-2,3-dihydrobenzo[e][1,3]oxazin-4-one. RP-HPLC: 2.38 min; ES-MS (M+H)+=318.0; 1H-NMR (DMSO-d6) δ (ppm): 3.1 (s, 3 H), 5.73 (s, 2 H), 6.2 (d, 1 H), 7.38 (d, 1 H), 7.61 (d, 1 H), 8.2 (d, 2 H).

1. extractionproduct extracted with ethyl acetate
2. dry with materialdried over anhydrous sodium sulfate
3. concentrationconcentrated