Pyridine → N-[3-[(4aR,7aS)-2-Amino-6-(5-fluoropyrimidin-2-yl)-4,4a,5,7-tetrahydropyrrolo[3,4-d][1,3]thiazin-7a-yl]phenyl]-3,5-difluoro-pyridine-2-carboxamide hydrochloride

Participants

Reaction Steps

N-[3-[(4aR,7aS)-2-Benzamido-6-(5-fluoropyrimidin-2-yl)-4,4a,5,7-tetrahydropyrrolo[3,4-d][1,3]thiazin-7a-yl]phenyl]-3,5-difluoro-pyridine-2-carboxamide (330 mg, 0.53 mmol) is dissolved in THF (10 mL) and diluted with ethanol (10 mL). O-Methylhydroxylamine hydrochloride (453 mg, 5.32 mmol) and pyridine (430 μL, 5.91 mmol) are added and the reaction is stirred at room temperature over the weekend (70 hrs). The reaction is warmed to 60° C. and stirred for 24 hrs. The mixture is concentrated onto silica gel (˜10 g) and purified via silica gel chromatography using a 0-10% gradient of 7 N ammonia methanol in dichloromethane to give the free base of the title compound. This material is dissolved in dichloromethane (5 mL) and 1 M hydrogen chloride in diethyl ether (0.49 mL, 490 μmol) is added. The solvent is removed in vacuo to give the title compound (159 mg, 54%). ES/MS (m/e): 486 (M+H).

Provenance & Evidence