2-Methoxy-4-nitrobenzenesulfonyl chloride → Benzo[b]thiophene-2-sulfonic acid [2-(2-methoxy-4-nitrobenzenesulfonylamino)phenyl]-amide

참여 물질

반응 단계

To a solution of benzo[b]thiophene-2-sulfonic acid (2-amino-phenyl)-amide (1 mmol, prepared as in Example 1) in DCM (2 mL) and pyridine (2 mL), 2-methoxy-4-nitrobenzenesulfonyl chloride (1.1 mmol) was added at RT and the reaction mixture was then allowed to stir at RT overnight or until the reaction was complete as determined by TLC or LC-MS. The reaction mixture was then diluted with DCM (20 mL). The organic phase was washed with 10% aqueous HCl (20 mL), water (20 mL), and brine (20 mL). The organic phase was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue obtained was purified by flash column chromatography eluting with DCM/EtOAc to yield 353 mg of benzo[b]thiophene-2-sulfonic acid [2-(2-methoxy-4-nitrobenzenesulfonylamino)phenyl]-amide. LC: Tr 1.21 min; MS: 520.7.7 (M+1)+. 1H NMR (CDCl3, 400 MHz): δ 4.24 (s, 3H), 6.72 (bs, 1H), 6.88 (d, 1H), 7.03 (t, 1H), 7.16 (t, 1H), 7.30 (d, 1H), 7.52 (t, 1H), 7.51 (t, 1H), 7.64 (s, 1H), 7.67-7.88 (m, 5H), 7.92 (s, 1H) ppm.

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