Pyridine → 1-methyl-1H-pyrazole-3-sulfonic acid benzyl-(1-oxo-1,2,3,4-tetrahydro-isoquinolin-6-yl)-amide

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To a stirred solution of 6-benzylamino-3,4-dihydro-2H-isoquinolin-1-one (45 mg, 0.18 mmol) and pyridine (31 μl, 0.39 mmol) in anhydrous acetonitrile (1 ml) was added 1-methyl-1H-pyrazole-3-sulfonyl chloride (70 mg, 0.39 mmol) and the reaction heated to 150° C. in a microwave for 0.5 hrs. The solvent was evaporated in vacuo and the crude residue purified by preparative tlc (5% methanol in dichloromethane) to afford the title compound as a yellow solid (10 mg, 14%). HPLC retention time 3.83 min. Mass spectrum (ES+) m/z 397 (M+H).

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