Cesium carbonate → (R)-2-(4-(morpholine-4-carbonyl)phenylamino)-6-(3-(2-oxopyrrolidin-1-yl)piperidin-1-yl)nicotinamide

Participants

Reaction Conditions

Reaction Steps

A solution of (R)-6-(3-aminopiperidin-1-yl)-2-(4-(morpholine-4-carbonyl)phenylamino)nicotinamide (80 mg) and ethyl 4-bromobutanoate (37 mg, 1 eq.) in DMF (1 mL) was treated with Cs2CO3 (184 mg, 3 eq) and heated at 100° C. for 2 days. The reaction mixture was diluted with ethyl acetate, washed with water, 10% LiCl, and concentrated. The residue was purified by MPLC chromatography (ISCO, 7% NH4OH/MeOH/CH2Cl2, 40 g silica gel column) to give 26 mg of (R)-2-(4-(morpholine-4-carbonyl)phenylamino)-6-(3-(2-oxopyrrolidin-1-yl)piperidin-1-yl)nicotinamide as a light yellow solid. LCMS: (M+H)+=493.27. 1H NMR (500 MHz, CDCl3) δ ppm 11.18 (1H, s), 7.67 (2H, d, J=8.80 Hz), 7.53 (1H, d, J=8.80 Hz), 7.36 (2H, d, J=8.80 Hz), 6.06 (1H, d, J=8.80 Hz), 5.68 (2H, br. s.), 4.20-4.45 (2H, m), 3.98-4.19 (1H, m), 3.71 (8H, br. s.), 3.42-3.49 (1H, m), 3.33-3.41 (1H, m), 2.92-3.00 (1H, m), 2.83-2.91 (1H, m), 2.44 (2H, t, J=8.25 Hz), 2.05 (2H, qd, J=7.61, 7.42 Hz), 1.94 (1H, dd, J=11.82, 3.57 Hz), 1.81-1.89 (1H, m), 1.59-1.80 (2H, m).

Provenance & Evidence