Triethylamine → 1-[4-[4-[4,5-Dihydro-5-(2-fluorophenyl)-3-isoxazolyl]-2-thiazolyl]-1-piperidinyl]-4,4,4-trifluoro-3-methyl-1-butanone

Participants

Reaction Steps

To a solution of 4,4,4-trifluoro-3-methyl-butanoic acid (64 mg, 0.408 mmol) in dichloromethane (3 mL) was added 1-propanephosphonic acid cyclic anhydride solution (50% in ethyl acetate, 0.5 mL). After stirring for 5 minutes, 4-[4-[5-(2-fluorophenyl)-4,5-dihydro-3-isoxazolyl)-2-thiazolyl]piperidine hydrochloride (i.e. the product of Step C) (150 mg, 0.408 mmol), triethylamine (0.1 mL) and 4-dimethylaminopyridine (5 mg) were sequentially added The reaction mixture was stirred for 3 h, and then concentrated under reduced pressure. The resulting material was purified by column chromatography on silica gel to provide the title compound, a compound of the present invention, as an oil (151 mg).

Provenance & Evidence