Dichloromethane → HCID 57941514, 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 4-fluoro-2-(trifluoromethyl)benzyl bromide (204 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 (2×25 mL), aqueous sodium thiosulfate, water, and brine. The solution was dried (magnesium sulfate), filtered, evaporated, and purified by column chromatography, eluting with 50% ethyl acetate/petroleum ether, to give an orange oil. 1H NMR showed that this oil contained some dimethyl formamide. The oil was dissolved in ethyl acetate and the solution was washed with water (3×10 mL), dried (magnesium sulfate), filtered, evaporated, then co-evaporated with ethyl ether and dichlormethane, and held under high vacuum to give (4S,7R)-2-(2,4-difluoro-phenyl)-1-(4-fluoro-2-trifluoromethyl-benzyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (63 mg, 40%) as a pale foam. APCI(+)-MS (M+H) 481.

Provenance & Evidence