反应详情

(2S)-3-[3-chloro-4-(1,1-dioxido-3-oxoisothiazolidin-5-yl)phenyl]-2-[(phenylsulfonyl)-amino]propanoic acid (15.0 mg, 0.0317 mmol) in DMF (1 mL) was treated with benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (16.8 mg, 0.0381 mmol) and stirred at rt for 5 minutes. A solution of 4-phenylbutan-1-amine (10 μL, 0.0634 mmol) and N,N-diisopropylethylamine (28 μL, 0.16 mmol) in DMF (1 mL) was added and the reaction stirred at rt for 1 h. Purification by preparative LCMS afforded product as a white solid (12.9 mg, 67%). 1H NMR (400 MHz, CD3OD): δ 7.68–7.64 (m, 2H), 7.54–7.34 (m, 4H), 7.27–7.11 (m, 7H), 5.59–5.57 (m, 1H), 3.92–3.87 (m, 1H), 3.42–3.35 (m, 1H), 3.35–3.28 (m, 1H), 2.99–2.84 (m, 3H), 2.79–2.74 (m, 1H), 2.56 (t, J=7.5 Hz, 2H), 1.53–1.47 (m, 2H), 1.33–1.29 (m, 2H); LCMS found for C28H31ClN3O6S2 (M+H)+: m/z=604.

1. stirringthe reaction stirred at rt for 1 h
2. customPurification by preparative LCMS