Benzo(B)Thiophene-2-Boronic Acid → n-(3-Benzo[b]thiophen-2-yl-1h-indazol-5-yl)-2-methylsulfonylbenzenesulfonamide

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N-(3-Benzo[b]thiophen-2-yl-1H-indazol-5-yl)-2-methylsulfonylbenzenesulfonamide can be obtained as described in Example 59 from 0.5 g of tert-butyl 3-iodo-5-(2-methylsulfonylbenzenesulfonylamino)indazole-1-carboxylate, 300 mg of thianaphthene-2-boronic acid, 20 ml of dimethylformamide, 1.9 ml of a saturated aqueous solution of sodium hydrogencarbonate and 25 mg of tetrakis(triphenylphosphine)palladium[0]. 150 mg of N-(3-benzo[b]thiophen-2-yl-1H-indazol-5-yl)-2-methylsulfonylbenzenesulfonamide are thus obtained in the form of a white solid melting at 270° C. (analysis C22H17N3O4S3% calculated C, 54.64; H, 3.54; N, 8.69; O, 13.23; S, 19.89. % found C, 54.59H, 3.47; N, 8.79; S, 19.98).

Provenance & Evidence