Triethylamine → 3-(Trifluoromethyl)isoxazole

Participants

Reaction Conditions

Reaction Steps

1,4-Phenylene diisocyanate (597.1 mg, 3.73 mol) and triethylamine (780 μL, 5.60 mmol) were added to a solution of 1-methoxy-4-trifluoropropynylbenzene (373.2 mg, 1.86 mmol) and 4-nitrobutanoic acid methyl ester (441.5 mg, 2.80 mmol) in toluene (10 mL). Using a microwave reactor, the obtained mixture was stirred at 150° C. for 2 hours. The reaction solution was filtered with celite, and the solvent was then distilled away. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain a trifluoromethyl isoxazole compound (144.0 mg, yield: 25%).

Provenance & Evidence