4-Chlorobenzenesulfonyl chloride → (2R)-2-(4-Chlorobenzenesulfonylamino)-4-methylpentanoic acid amide

Participants

Reaction Steps

To a solution of (D)-leucinamide hydrochloride (0.25 g, 1.5 mmol), and Et3N (0.43 mL, 3.0 mmol) in CH2Cl2 (150 mL) was added 4-chlorobenzenesulfonyl chloride (380 mg, 1.8 mmol). The resulting solution was stirred at rt for 18 h. The reaction was then diluted with CH2Cl2 (200 mL) and washed with H2O, 0.5 N HCl, brine, and dried over MgSO4, to afford the titled compound (410 mg) as a white solid in 90% yield. MS (ESI), (M+H)+ 305.2; 1H NMR (DMSO-d6) δ 7.77 (d, 2H, J=8.7), 7.62 (d, 2H, J=8.7), 6.90 (br s, 1H), 3.67 (m, 1H), 1.54 (m, 1H), 1.31 (m, 2H), 0.81 (d, 3H, J=7.0), 0.71 (d, 3H, J=7.0).

Provenance & Evidence