m-Chloroperbenzoic acid → HCID 66743545, compound

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Reaction Steps

As shown in step 18-i of Scheme 18, to 7-hydroxy-6-(1-(2,2,2-trifluoroethyl)-1H-pyrazol-4-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-5-one (Compound 2055, 4.35 g, 14.6 mmol) in CHCl3 (80 mL) and MeOH (40 mL) was added mCPBA (5.39 g, 21.9 mmol). After stirring for 24 hours, additional mCPBA (1.26 g, 7.30 mmol) was added. After stirring an additional 16 hours, the resulting precipitate was collected by filtration and washed with DCM (10 mL) and Et2O (20 mL) to give 7-hydroxy-5-oxo-6-(1-(2,2,2-trifluoroethyl)-1H-pyrazol-4-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine 1-oxide (Compound 2059, 2.49 g) as a white solid: ESMS (M+H) 315.25; 1H NMR (DMSO-d6, 300 MHz) δ 8.44 (d, J=6 Hz, 1H), 8.31 (s, 1H), 7.89 (s, 1H), 7.65 (m, 2H), 7.43 (d, J=9 Hz, 1H), 6.41 (d, J=9 Hz, 1H), 5.20 (q, J=9 Hz, 2H).

Provenance & Evidence