Ethanol → HCID 57941431, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of (4S,7R)-2-(2,4-difluoro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 14; 100 mg, 0.33 mmol), tetrabutylammonium iodide (120 mg, 0.32 mmol) and 3,5-bis(trifluoromethyl)benzyl bromide (240 μL, 1.3 mmol) in dimethylformamide (2 mL) was heated at 100° C. overnight. Dichloromethane (50 mL) was added and the solution was washed with 1:1 water/brine (20 mL), water (2×20 mL), aqueous sodium thiosulfate (20 mL), and brine (20 mL). The solution was dried (magnesium sulfate), filtered, evaporated, and purified by column chromatography, eluting with 45-50% ethyl acetate/petroleum ether, to give an oil. The oil was co-evaporated with ethanol, and the residue was held under high vacuum to give (4S,7R)-1-(3,5-bis-trifluoromethyl-benzyl)-2-(2,4-difluoro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (128 mg, 73%) as a white solid. APCI(+)-MS (M+H) 531.

Provenance & Evidence