反应详情

3-Nitro-7,8-dihydro-6H-5-oxa-9-aza-benzocycloheptene-9-carboxylic acid methyl ester was prepared from 3-(3-chloro-propyl)-6-nitro-3H-benzoxazol-2-one and methanol in an analogous manner to Example 1426a. Product isolated as a yellow oil (388 mg, 66%). LCMS (m/e) 253 (M+H); 1H-NMR (CDCl3, 400 MHz) δ 7.91-7.81 (m, 2H), 7.56-7.37 (m, 1H), 4.32-4.18 (m, 2H), 3.95-3.80 (m, 2H), 3.79 (s, 3H), 2.22-2.12 (m, 2H).