反应详情

To a stirring suspension of (R)-4-(3-hydroxy-2-oxopyrrolidin-1-yl)-N-(thiazol-2-yl)benzenesulfonamide (200 mg, 0.59 mmol) in CH2Cl2 (0.50 mL), under N2, at 0° C., was added N,N-diisopropylethylamine (0.10 mL, 0.59 mmol) followed by allylbromide (51 uL, 0.59 mmol). The mixture was stirred at ambient temperature for 19 hours. The mixture was evaporated to dryness under reduced pressure. The residue was purified via silica gel using 50% EtOAc in hexanes to give the desired sulfonamide as a white solid (220 mg, 0.57 mmol, 96% yield). 1H NMR (400 MHz, DMSO-d6) δ 7.86-7.80 (m, 4H), 7.37 (d, J=4.7 Hz, 1H), 6.93 (d, J=4.7 Hz, 1H), 5.92-5.83 (m, 2H), 5.17 (dd, J=1.3, 10.3 Hz, 1H), 4.98 (q, J=1.4 Hz, 1H), 4.55 (dt, J=5.3, 1.7 Hz, 2H), 4.36-4.30 (m, 1H), 3.81-3.76 (m, 1H), 3.70 (td, J=9.5, 5.4 Hz, 1H), 2.45-2.38 (m, 1H), 1.90-1.80 (m, 1H).

1. customThe mixture was evaporated to dryness under reduced pressure
2. customThe residue was purified via silica gel using 50% EtOAc in hexanes