Potassium Carbonate → (8S,9aS)-8-hydroxy-2-[5-(trifluoromethyl)pyridin-2-yl]octahydro-5H-pyrrolo[1,2-a][1,4]diazepin-5-one

Participants

Reaction Steps

To (8S,9aS)-5-oxo-2-[5-(trifluoromethyl)pyridin-2-yl]octahydro-1H-pyrrolo[1,2-a][1,4]diazepin-8-yl 4-nitrobenzoate (135 mg, 0.291 mmol, Part C) in methanol (2.5 mL) was added potassium carbonate (24 mg, 0.174 mmol). The mixture was stirred at room temperature for 1.5 hours and then concentrated. The residue was purified by chromatography on silica gel (ethyl acetate, then ethyl acetate/methanol=10:1) to give 78 mg (85% yield) of the titled compound as a solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.72 (m, 1H), 2.28 (m, 1 H), 2.45 (m, 1H), 2.63 (m, 1 H), 3.35 (m, 3 H), 3.44 (m, 1 H), 3.92 (m, 1H), 4.17 (m, 1H), 4.42 (m, 2H), 5.09 (br s, 1H), 7.00 (d, J=8 Hz, 1 H), 7.80 (d, J=8 Hz, 1 H), 8.43 (s, 1 H); MS (ESI) m/z 316.0 (M+H)+.

Provenance & Evidence