2-(Benzo[1,2,5]thiadiazole-4-sulfonylamino)-4-chlorobenzoic acid → HCID 11556194, compound

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Reaction Steps

2-(Benzo[1,2,5]thiadiazole-4-sulfonylamino)-4-chloro-benzoic acid was coupled to (2S,3R)-2-amino-3-(3,4-dichloro-phenyl)-butyric acid methyl ester as in EXAMPLE 1, Part C. The resulting methyl ester was hydrolyzed as in EXAMPLE 2, Part E, to afford the title compound. HPLC: RT=10.22 min. MS (ESI−): mass calcd. for C23H17Cl3N4O5S2, 597.97; m/z found, 597/599 [M−H]−. 1H NMR (500 MHz, CDCl3): 11.26 (s, 1H), 8.36 (d, J=7.0, 1H), 8.21 (d, J=8.8, 1H), 7.73-7.70 (m, 2H), 7.37 (d, J=8.3, 1H), 7.27 (m, 1H), 7.23 (d, J=6.4, 1H), 7.04 (dd, J=8.2, 2.0, 1H), 6.96 (dd, J=8.4, 2.0, 1H), 6.44 (d, J=8.6, 1H), 4.97-4.94 (m, 1H), 3.38-3.36 (m, 1H), 1.46 (d, J=7.2, 3H).

Provenance & Evidence