反应详情

A mixture of 9-Chloro-4,5-dihydro-6-oxa-1-thia-10-aza-benzo[e]azulene-2-carboxylic acid (24.6 g, 87.5 mmol), N,N-Diisopropylethylamine (68 g, 525 mmol), ammonium chloride (18.7 g, 350 mmol) and HATU (66.5 g, 175 mmol) in N,N-Dimethyl-formamide (200 mL) was stirred at r.t. for overnight. The reaction mixture was added saturated sodium bicarbonate. After filtered, the filtrate was concentrated to 23 g of 9-Chloro-4,5-dihydro-6-oxa-1-thia-10-aza-benzo[e]azulene-2-carboxylic acid amide (yield: 94%) 1H-NMR (DMSO, 400 MHz): δ7.96 (d, J=18.4 Hz, 1H), 7.56 (s, 1H), 7.49 (d, J=8.4 Hz, 1H), 7.43 (s, 1H), 7.31 (d, J=4.8 Hz, 1H), 4.33 (t, J=4.8 Hz, 2H), 3.19 (t, J=4.8 Hz, 2H). LC-MS (ESI): m/z=281 [M+H]+

1. filtrationAfter filtered