反应详情

温度

23 °C

To a vigorously stirred solution of N2-(2-methoxy-benzyl)-4H-benzo[d][1,3]oxazine-2,6-diamine (Example 4) (128 mg, 0.45 mmol; HPLC 0.41 min) in ethyl acetate (2 ml) and sat. sodium hydrogen carbonate-sol. (1.2 ml) at 23° C. was dropwise added cyclopropanecarbonyl chloride (50 ul, 0.54 mmol) and the mixture was stirred at 23° C. for 20 min. Diluted with ethyl acetate and water, separated phases, washed organic layer with brine and dried over sodium sulfate. Removal of the solvent in vacuum left an off-white solid which was purified by silica gel column chromatography with heptane/ethyl acetate 1:1 to 0:1 followed by trituration with diethyl ether to give the title compound as a white solid (95 mg, 55%, HPLC 0.998 min 100%), MS (ISP) m/e=352.3 [(M+H)+].

1. customat 23° C.
2. customseparated phases
3. washwashed organic layer with brine
4. dry with materialdried over sodium sulfate
5. customRemoval of the solvent in vacuum
6. waitleft an off-white solid which
7. customwas purified by silica gel column chromatography with heptane/ethyl acetate 1:1 to 0:1