反应详情

3-Nitro-7,8-dihydro-6H-5-oxa-9-aza-benzocycloheptene-9-carboxylic acid 2-methoxy-ethyl ester was prepared from 3-(3-chloro-propyl)-6-nitro-3H-benzoxazol-2-one and 2-methoxyethanol in an analogous manner to Example 1426a. Product isolated as a yellow oil (175 mg, 25%). LCMS (m/e) 297 (M+H); 1H-NMR (CDCl3, 400 MHz) δ 7.89-7.83 (m, 2H), 7.57-7.42 (m, 1H), 4.43-4.20 (m, 4H), 3.95-3.81 (m, 2H), 3.70-3.54 (m, 2H), 3.38 (s, 3H), 2.23-2.12 (m, 2H).