Water → 1-[(Dimethylphosphinyl)methyl]-4-(2,3,4,5,6-pentafluorophenoxy)piperidine

Participants

Reaction Conditions

Reaction Steps

To a stirring mixture of 9.0 g of potassium carbonate in 100 ml of dimethylformamide was added 8.0 g of 4-(2,3,4,5,6-pentafluorophenoxy)piperidine and 9.5 g of dimethylphosphinylmethyl chloride. After stirring at 80° C. for 30 hours, the reaction mixture was cooled, poured into water, and extracted with ethyl acetate. The organic layer was washed with water followed by a saturated sodium chloride solution and dried over anhydrous magnesium sulfate. After filtering, evaporation afforded a residue which was purified by means of high pressure liquid chromatography (silica gel; elution with 5% methanol/dichloromethane). The desired fractions were evaporated to yield a solid which was sublimed to afford 2.37 g (22.1%) of 1-[(dimethylphosphinyl)methyl]-4-(2,3,4,5,6-pentafluorophenoxy) piperidine, m.p. 120°-123° C.

Provenance & Evidence