Methyl 2-amino-5-chlorobenzoate → 2-(Benzo[1,2,5]thiadiazole-4-sulfonylamino)-5-chloro-benzoic acid methyl ester

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Reaction Steps

The title compound (1.56 g, 75%) was prepared from benzo[1,2,5]thiadiazole-4-sulfonyl chloride and 2-amino-5-chloro-benzoic acid methyl ester as in Example 1, Part A. HPLC: RT=10.77 min. MS (ESI+): mass calcd. for C14H10ClN3O4S2, 382.98; m/z found, 406 [M+Na]+. 1H NMR (500 MHz, CDCl3): 11.16 (s, 1H), 8.35 (dd, J=7.0, 1.0, 1H), 8.22 (dd, J=8.8, 1.0, 1H), 7.82 (d, J=2.5, 1H), 7.72-7.68 (m, 2H), 7.34 (dd, J=9.0, 2.5, 1H), 3.92 (s, 3H).

Provenance & Evidence