Water → HCID 58169868, compound

Participants

Reaction Steps

(2R)—N-{(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethyl}-2-(4-fluoro-2-methylphenyl)-N-methyl-4-nitro-1-piperidinecarboxamide (Intermediate 38, 500 mg, 0.934 mmol) was dissolved in Dimethyl Sulfoxide (DMSO) (6 ml) and to this solution were added potassium fluoride (271 mg, 4.67 mmol) and tetrabutylammonium iodide (345 mg, 0.934 mmol). The mixture was left stirring at rt for 10 min (pink mixture), then dimethyl maleate (0.584 ml, 4.67 mmol) was added. The mixture was left stirring at rt for 4 hrs and at 40° C. for 1 hr, then water and Et2O were added. The two phases were separated and the organic one was washed with 1N HCl. The organic phase was dried over Na2SO4 and evaporated to dryness. The crude was purified by flash chromatography (40M cartridge; eluting from 9:1 to 7:3 Cy:EtOAc) to give two batches of the title compound:

Provenance & Evidence