Dimethylformamide → N-[3-(4-Amino-pyrazolo[3,4-d]pyrimidin-1-yl)-phenyl]-4-chloro-benzenesulfonamide

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Title compound 11B, 1-(3-amino-phenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-ylamine (40 mg, 1.1 eq, 0.18 mmol), 4-chlorobenzenesulphonylchloride (34 mg, 1.0 eq, 0.16 mmol) and diisopropylethylamine (28 μl, 1.0 eq, 0.16 mmol) were added to DMF (1 ml) and the mixture was stirred for 18 hours at room temperature under an inert atmosphere. Methanol was then added (1 ml) and the solvents were removed in vacuo. The resultant oil was purified by semi-preparative HPLC to yield the title compound as a white solid (45 mg, 0.11 mmol, 70%). LCMS: [M+H]+=401, Rt=1.80 min, 100% purity.

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