Triethylamine → (S)-6-((4-cyanophenyl)sulfonyl)-N-(4-(ethylsulfonyl)benzyl)-7-isopropyl-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine-3-carboxamide

Participants

Reaction Steps

To a solution of (S)-N-(4-(ethylsulfonyl)benzyl)-7-isopropyl-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine-3-carboxamide (6.9 mg, 17.8 μmol) in CH2Cl2 (600 μL) was added triethylamine (5.0 μL, 36.6 μmol) and 4-cyanobenzenesulfonyl chloride (5.4 mg, 26.8 μmol). The mixture was stirred at rt for 15 h, at which point it was quenched with saturated aqueous sodium bicarbonate (10 mL). The mixture was extracted with EtOAc (10 mL), then the organic phase was washed with brine (10 mL), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. The residue was purified by reverse-phase HPLC to yield 4.9 mg of (S)-6-((4-cyanophenyl)sulfonyl)-N-(4-(ethylsulfonyl)benzyl)-7-isopropyl-6,7-dihydro-5H-pyrrolo[3,4-b]pyridine-3-carboxamide as an HCl salt (13, 46%). LC-MS tR=0.84 min in 1 min chromatography, MS (ESI) m/z 553.5 [M+H]+. 1H NMR (CD3OD, 400 MHz): δ 8.85 (d, J=2.0 Hz, 1H), 8.09 (d, J=1.6 Hz, 1H), 8.03 (dd, J=2.0 Hz, 8.8 Hz, 2H), 7.86 (m, 4H), 7.60 (d, J=8.4 Hz, 2H), 4.93 (m, 2H), 4.73 (dt, J=1.2 Hz, 16.4 Hz, 1H), 4.66 (s, 2H), 3.19 (q, J=7.6 Hz, 2H), 2.41-2.32 (m, 1H), 1.20 (t, J=7.6 Hz, 3H), 1.00 (d, J=7.2 Hz, 3H), 0.96 (d, J=6.8 Hz, 3H).

Provenance & Evidence