反应详情

To a solution of 4-chloro-5-[(methyloxy)carbonyl]-1H-pyrrole-3-carboxylic acid (0.075 g, 0.368 mmol) in DMF (1 mL) was added DIPEA (0.097 mL, 0.553 mmol) and HATU (0.168 g, 0.442 mmol). Ammonia was bubbled through the reaction mixture for 5 min. and the reaction stirred at RT for 1 h. The crude material was purified by HPLC. The desired fractions were collected and lypholized to afford methyl 4-(aminocarbonyl)-3-chloro-1H-pyrrole-2-carboxylate (0.044 g, 59% yield) as a white solid. 1H NMR (400 MHz, DMSO-d6): δ ppm 12.40-12.56 (m, 1H) 7.54 (d, 1H) 7.29 (br. s., 1H) 7.13 (br. s., 1H) 3.80 (s, 3H). MS: m/z 203.0 (M+1).

1. customAmmonia was bubbled through the reaction mixture for 5 min.
2. customThe crude material was purified by HPLC
3. customThe desired fractions were collected