Thionyl Chloride → HCID 86604679, compound

Participants

Reaction Steps

2-[6-(4-Iodo-phenyl)-7-oxo-3-trifluoromethyl-4,5,6,7-tetrahydro-pyrazolo[3,4-c]pyridin-1-yl]-5-methoxy-benzoic acid (186 mg, 0.334 mmol) was dissolved in dry chloroform (10 mL) to which was added thionyl chloride (243 μL, 3.34 mmol), and the reaction heated to reflux. The solvent was evaporated, and the residue dried under vacuum to give 2-[6-(4-iodo-phenyl)-7-oxo-3-trifluoromethyl-4,5,6,7-tetrahydro-pyrazolo[3,4-c]pyridin-1-yl]-5-methoxy-benzoyl chloride as a pale yellow foam. This material was dissolved in dry methylene chloride (10 mL) to which were added pyridine (0.14 mL, 1.67 mmol), N,N-dimethylaminopyridine (4 mg, 0.033 mmol), and lastly C-(1H-imidazol-2-yl)-methylamine bis-hydrochloride (114 mg, 0.668 mmol). Upon completion of the reaction the solvent was evaporated, and the residue was purified by preparative HPLC to give the title compound (69 mg, 24%) as a colorless solid. MS (ES+) 636.9 (M+H)+(100%).

Provenance & Evidence