反应详情

A mixture of compound 5-(11-fluoro-6H-pyrido[2′,3′:5,6][1,3]oxazino[3,4-a]indol-2-yl)-3-(methylcarbamoyl)-6-(N-methylmethylsulfonamido)benzofuran-2-carboxylic acid (50 mg, 0.09 mmol), HOBT (24 mg, 0.17 mmol), EDCI (102 mg, 0.53 mmol), methanamine hydrochloride (42 mg, 0.62 mmol) and Et3N (72 mg, 0.71 mmol) in DMF (2 mL) was stirred overnight at room temperature. The reaction mixture was concentrated in vacuo, the residue was purified by prep-TLC (DCM:MeOH=200:1) to give the product 5-(11-fluoro-6H-pyrido[2′,3′:5,6][1,3]oxazino[3,4-a]indol-2-yl)-N2,N3-dimethyl-6-(N-methylmethylsulfonamido)benzofuran-2,3-dicarboxamide (20 mg, yield: 39%). 1H NMR (CDCl3, 400 MHz) δ 10.49 (br s, 1H), 8.81 (s, 1H), 7.68 (s, 1H), 7.49 (s, 2H), 7.24˜7.17 (m, 3H), 7.12 (d, J=8.2 Hz, 1H), 6.88˜6.81 (m, 1H), 6.01 (s, 2H), 3.39 (s, 3H), 3.12 (d, J=5.2 Hz, 3H), 3.02 (d, J=4.8 Hz, 3H), 2.65 (s, 3H). MS (M+H)+: 578.

1. concentrationThe reaction mixture was concentrated in vacuo
2. customthe residue was purified by prep-TLC (DCM:MeOH=200:1)