3-Aminophenylboronic acid → N-[3-(3-aminophenyl)-1H-indazol-5-yl]-2-methylsulfonylbenzenesulfonamide

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N-[3-(3-Aminophenyl)-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, 276 mg of 3-aminophenylboronic acid, 20 ml of dimethylformamide, 1.6 ml of a saturated aqueous sodium hydrogencarbonate solution and 25 mg of tetrakis(triphenylphosphine)palladium[0]. 102 mg of N-[3-(3-aminophenyl)-1H-indazol-5-yl]-2-methylsulfonylbenzenesulfonamide are thus obtained in the form of a white solid melting at 220° C. (analysis C20H18N4O4S2 % calculated C, 54.29; H, 4.10; N, 12.66; O, 14.46; S, 14.49. % found C, 53.48; H, 4.11 N, 12.50; S, 13.95).

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