Dimethylsulphamoyl chloride → 1-[5-(Dimethylaminosulfonylamino)indole-2-carbonyl]-4-[N-methyl-N-(3-(1-methylethylamino)-2-pyridinyl)amino]piperidine

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Reaction Steps

To a solution of 1-[5-aminoindole-2-carbonyl]-4-[N-methyl-N-(3-(1-methylethylamino)-2-pyridinyl)amino]piperidine (PREPARATION 56, 91 mg) in pyridine (0.5 ml) under nitrogen is added N,N-dimethylsulfamoyl chloride. The mixture is stirred at 20°-25° for 16 hr and then diluted with methylene chloride (35 ml) and 1M hydrochloric acid (20 ml). The layers are separated and the organic layer is washed with 1M hydrochloric acid (20 ml) and saline, dried over sodium sulfate, and concentrated to give a solid film which is then chromatographed on two 2000 μ preparative silica gel plates, eluting with methanol/chloroform (5/95). The desired band is extracted and concentrated to give the title compound, NMR (CDCl3) 10.34, 7.72, 7.64, 7.56, 7.37, 7.16, 6.95, 6.84, 6.70, 4.65, 4.50, 3.56, 3.46, 3.40-3.00, 2.80, 2.63, 1.93, 1.64 and 1.22 δ.

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