3-Chlorobenzenesulphonyl chloride → (S,S)-2-(3-Chloro-benzenesulfonylamino)-3-cyclohexyl-N-[1-methyl-2-(4-trifluoromethoxy-phenylamino)-ethyl]-propionamide

Participants

Reaction Steps

The product from step D (15.4 mg, 39.7 μmol) was added to a flask with DMAP (14.5 mg, 0.119 mmol) and dry DMF (0.5 mL). 3-Chloro-benzenesulfonyl chloride (8.37 mg, 39.7 μmol) was added as a solution in 0.5 mL of dry DMF dropwise over 3 minutes. The resulting solution was stirred for 12 hours and the volatiles were stripped off. The solids were taken up in methanol and purified by prep HPLC. Yield 15 mg, 67%. 1H NMR (CDCl3) δ(ppm): 7.9 (s, 1H), 7.75 (d, J=7.9 Hz, 1H), 7.6 (d, J=8 Hz, 1H), 7.5 (t, J=7.9 Hz, 1H), 7.05 (d, J=8.3 Hz, 2H), 6.6 (d, J=8.9 Hz, 2H), 6.15 (s, 1H), 5.1 (s, 1H), 4.1 (m, 1H), 3.65 (m, 1H), 3.25 (dd J=4.7, 12.9 Hz, 1H), 3.1 (dd J=7.5, 12.7 Hz, 1H), 1.6 (m, 7H), 1.4 (m, 1H), 1.3 (m, 1H), 1.2 (d, J=8.4 Hz, 3H), 1.07 (m, 3H), 0.65 (m, 1H). C25H31CWF3N3O4S: LC/MS=562.2 (M+1).

Provenance & Evidence