(R)-Methyl 6-(1-amino-4-methyl-1-oxopentan-2-ylamino)-4-cyano-2-(3-(methylsulfonyl)phenylamino)nicotinate → (R)-4-Methyl-2-(4-(3-(methylsulfonyl)phenylamino)-3-oxo-2,3-dihydro-1H-pyrrolo[3,4-c]pyridin-6-ylamino)pentanamide

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Reaction Steps

A mixture of (R)-methyl 6-(1-amino-4-methyl-1-oxopentan-2-ylamino)-4-cyano-2-(3-(methylsulfonyl)phenylamino)nicotinate (73.2 mg, 0.159 mmol) and palladium hydroxide on carbon (23.2 mg, 0.165 mmol) in MeOH (6 mL) and HOAc (3 mL) was stirred at RT for 12 h under a hydrogen atmosphere. The mixture was filtered to remove the catalyst and the filtrate was concentrated under reduced pressure. The residue was treated with saturated aq NaHCO3 (20 mL) and MeOH (20 mL). The resulting mixture was stirred at RT for 16 h and then concentrated under reduced pressure. The residue was treated with saturated aq NaHCO3 (30 mL) and extracted with EtOAc (2×50 mL). The organic layers were washed with saturated aq NaHCO3 (20 mL), water (20 mL) and brine (20 mL), were dried over anhydrous Na2SO4, and filtered. The filtrate was concentrated under reduced pressure and the residue was recrystallized from EtOH to give the title compound as a white solid (18.8 mg, 27%). 1H-NMR (DMSO-d6) δ ppm 0.87-0.94 (m, 6H), 1.54-1.63 (m, 2H), 1.76 (br s, 1H), 3.32 (s, 3H), 4.24 (s, 2H), 4.50 (br s, 1H), 6.17 (s, 1H), 7.00-7.04 (m, 2H), 7.22 (br s, 1H), 7.47-7.57 (m, 2H), 8.01 (br s, 1H), 8.06 (s, 1H), 8.45 (br s, 1H), 9.23 (s, 1H). [M+H] calc'd for C20H26N5O4S, 432. found, 432.5.

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