5-(Chloromethyl)-2-methoxypyridine → HCID 57941371, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (4R,7S)-2-(2,4-difluoro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 42; 480 mg, 1.6 mmol), 5-chloromethyl-2-methoxy-pyridine (Intermediate 50; 995 mg, 6.3 mmol) and tetrabutylammonium iodide (583 mg, 1.6 mmol) in dimethylformamide (63 mL) was heated at 100° C. for 48 h. The solvent was evaporated and dichloromethane (150 mL) was added. The solution was washed with saturated aqueous sodium thiosulfate (200 mL), saturated aqueous sodium hydrogen carbonate (200 mL) and brine (200 mL), dried (sodium sulfate), filtered, evaporated and purified using a Biotage 40M system, eluting with 20-50% ethyl acetate/hexanes and then 2% methanol/dichloromethane, to give a crude product that contains some tetrabutylammonium iodide. This material was taken up in dichloromethane (50 mL) and washed with 5% dimethylformamide in water (2×100 mL) and water (5×100 mL). The organic phase was dried (sodium sulfate), filtered and evaporated to give (4R,7S)-2-(2,4-difluoro-phenyl)-1-(6-methoxy-pyridin-3-ylmethyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (59 mg, 9%). APCI(+)-MS (M+H) 426.

Provenance & Evidence