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

Participants

Reaction Conditions

Reaction Steps

Into a 100-mL 3-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed 1-[(4-[5-[3-chloro-5-(trifluoromethyl)phenyl]-5-(trifluoromethyl)-4,5-dihydro-1,2-oxazol-3-yl]-2-methylphenyl)carbonyl]imidazolidin-4-one (80 mg, 0.15 mmol, 1.00 equiv), N,N-dimethylformamide (5 mL). This was followed by the addition of NaH (60%) (12.3 mg, 0.51 mmol, 2.00 equiv) in several batches at 0° C. The resulting solution was stirred for 30 min at 0° C. To this was added 2,2,2-trifluoroethyl trifluoromethanesulfonate (71 mg, 0.31 mmol, 2.00 equiv). The resulting solution was allowed to react, with stirring, for an additional 3 h at room temperature. The reaction was then quenched by the addition of 20 mL of water/ice. The resulting solution was extracted with 3×10 mL of ethyl acetate and the organic layers combined. The mixture was dried over anhydrous sodium sulfate. This resulted in 14 mg (15%) of 1-[(4-[5-[3-chloro-5-(trifluoromethyl)phenyl]-5-(trifluoromethyl)-4,5-dihydro-1,2-oxazol-3-yl]-2-methylphenyl)carbonyl]-3-(2,2,2-trifluoroethyl)imidazolidin-4-one as a light yellow solid. (ES, m/z): [M+CH3CN]+ 643; 1H NMR (300 MHz, CDCl3): δ 7.82 (s, 1H), 7.76 (s, 1H), 7.697 (s, 1H), 7.58-7.61 (m, 2H), 7.28-7.34 (m, 1H), 5.196 (s, 1H), 4.911 (s, 1H), 4.646 (s, 1H), 4.03-4.18 (m, 2H), 3.998 (s, 1H), 3.70-3.76 (m, 1H), 2.399 (s, 3H).

Provenance & Evidence