Ammonia methanol → (+/-)-9-(3-Carbamoyl-3-hydroxy-but-1-ynyl)-8-fluoro-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid amide

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Reaction Conditions

Reaction Steps

Into a 100-mL round-bottom flask, was placed a solution of methyl 4-[4-carbamoyl-12-fluoro-9-oxa-3,6-diazatricyclo[8.4.0.0[2,6]]tetradeca-1(14),2,4,10,12-pentaen-13-yl]-2-hydroxy-2-methylbut-3-ynoate (300 mg, 0.80 mmol, 1.00 equiv) in NH3/MeOH (30 w/w %, 40 mL). The resulting solution was stirred for 12 h at 25° C. The resulting mixture was concentrated under vacuum. The resulting mixture was washed with 3×10 mL of methanol and 2×5 mL of CH3CN. The trace solvents were removed under reduced pressure. This resulted in 43 mg (15%) of 9-(3-Carbamoyl-3-hydroxy-but-1-ynyl)-8-fluoro-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene-2-carboxylic acid amide as a brown solid. LC-MS: (ES, m/z): 359[M+H]+; 1H-NMR: (400 MHz, DMSO-d6, ppm): δ 8.579 (d, 1H), 7.786 (s, 1H), 7.589 (br s, 1H), 7.378 (br s, 2H), 7.128 (br s, 1H), 7.029 (d, 1H), 6.423 (s, 1H), 4.600-4.410 (m, 4H), 1.612 (s, 3H).

Provenance & Evidence