Ammonia methanol → 4,4-Difluoro-9-(3-hydroxy-3-methyl-but-1-ynyl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid amide

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Reaction Steps

To a solution of 4,4-Difluoro-9-(3-hydroxy-3-methyl-but-1-ynyl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid methyl ester (86 mg, 0.227 mmol) in THF (5 mL) at room temperature, NH3/CH3OH (self-made, 5 mL) was added. The mixture was stirred at room temperature for 3 h, then concentrated to give a residue which was purified by flash column chromatography (silica gel, EtOAc in hexane from 0 to 50%) to give 4,4-Difluoro-9-(3-hydroxy-3-methyl-but-1-ynyl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid amide as an off-white solid (25 mg, 30%). 1H NMR (400 MHz, DMSO-d6): δ 8.76 (s, 1H), 8.60 (d, J=2.1 Hz, 1H), 8.18 (s, 1H), 7.46 (dd, J1=8.4 Hz, J2=2.2 Hz, 1H), 7.22 (d, J=8.4 Hz, 1H), 5.49 (s, 1H), 4.75 (t, J=10.7 Hz, 2H), 1.49 (s, 6H); LC-MS (ESI & APCI): 365.4 (M+1).

Provenance & Evidence