Methyl Isocyanate → 1-(N-methylamino)carbonyl-4-(2,3,4,5,6-pentafluorophenoxy)-4-phenylpiperidine

Participants

Reaction Steps

A solution of 5.0 g of 4-(2,3,4,5,6-pentafluorophenoxy)-4-phenylpiperidine in 50 ml of benzene was treated with a solution of 0.9 g of methyl isocyanate in 20 ml of benzene over a period of ten minutes. The reaction mixture was then stirred at ambient temperature for two hours. Evaporate of the volatiles afforded a solid which was purified by means of high pressure liquid chromatography (silica gel; elution with 50% ethyl acetate/dichloromethane) to yield 4.0 g (69%) of 1-(N-methylamino)carbonyl-4-(2,3,4,5,6-pentafluorophenoxy)-4-phenylpiperidine, m.p. 87°-89° C.

Provenance & Evidence