Diisopropylethylamine → 1-[(4-[5-[3-Chloro-5-(trifluoromethyl)phenyl]-5-(trifluoromethyl)-4,5-dihydro-1,2-oxazol-3-yl]-2-(2,2,2-trifluoroethyl)phenyl)carbonyl]imidazolidin-4-one

Participants

Reaction Steps

Into a 25-mL round-bottom flask, was placed 4-[5-[3-chloro-5-(trifluoromethyl)phenyl]-5-(trifluoromethyl)-4,5-dihydro-1,2-oxazol-3-yl]-2-(2,2,2-trifluoroethyl)benzoic acid (200 mg, 0.38 mmol, 1.00 equiv), N,N-dimethylformamide (10 mL), HATU (292 mg, 0.77 mmol, 2.00 equiv), DIEA (99 mg, 0.77 mmol, 1.94 equiv), imidazolidin-4-one hydrochloride (94 mg, 0.77 mmol, 1.98 equiv). The resulting solution was stirred for 2 h at r t. The reaction was then quenched by the addition of 10 mL of water. The resulting solution was extracted with 2×10 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 3×20 mL of brine. The resulting mixture was concentrated under vacuum. The residue was applied onto a TLC plate with ethyl acetate/petroleum ether (2:1). This resulted in 150 mg (60%) of 1-[(4-[5-[3-chloro-5-(trifluoromethyl)phenyl]-5-(trifluoromethyl)-4,5-dihydro-1,2-oxazol-3-yl]-2-(2,2,2-trifluoroethyl)phenyl)carbonyl]imidazolidin-4-one as yellow oil.

Provenance & Evidence