Sodium Bicarbonate → 2-methylsulfonyl-N-[3-(1H-pyrrol-2-yl)-1H-indazol-5-yl]benzenesulfonamide

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2-Methylsulfonyl-N-[3-(1H-pyrrol-2-yl)-1H-indazol-5-yl]benzenesulfonamide can be obtained as described in Example 59 from 0.5 g of tert-butyl 3-iodo-5-(2-methylsulfonylbenzenesulfonylamino)indazole-1-carboxylate, 365 mg of 1-(tert-butyloxycarbonyl)pyrrole-2-boronic acid, 20 ml of dimethylformamide, 1.87 ml of saturated aqueous sodium hydrogencarbonate solution and 24.5 mg of tetrakis(triphenylphosphine)palladium[0]. 108 mg of 2-methylsulfonyl-N-[3-(1H-pyrrol-2-yl)-1H-indazol-5-yl]benzenesulfonamide are thus obtained in the form of a pale green solid melting at 255° C. (analysis C18H16N4O4S2 % calculated: C, 51.91; H, 3.87; N, 13.45; O, 15.37; S, 15.40. % found C, 51.63; H, 3.87; N, 13.27; S, 15.21).

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