Hexane → HCID 86669912, compound

Participants

Reaction Conditions

Reaction Steps

Trifluoromethanesulfonic anhydride (0.074 mL, 0.440 mmol) was added to a solution of 8-methyl-3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazol-7-ol (Preparation 64C, 0.121 g, 0.293 mmol) in pyridine (5 mL) at 0° C. over a period of 5 min. The reaction mixture was stirred at 0° C. for ten minutes and then at room temperature overnight. The reaction mixture was concentrated, and the yellowish-brown residue was partitioned between ethyl acetate (10 mL) and water (10 mL). The ethyl acetate layer was washed sequentially with 1N aqueous HCl (10 mL), saturated aqueous NaHCO3 (10 mL), and brine (10 mL). The organic layer was collected, dried over sodium sulfate, and concentrated. The residue was purified by silica gel column chromatography eluting with a mixture of 15% ethyl acetate:85% hexane to yield 8-methyl-3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazol-7-yl trifluoromethanesulfonate as a tan solid (0.123 g, 0.226 mmol, 77%). The product had an HPLC ret. time=4.52 min (condition B). LC/MS M+1=545.2.

Provenance & Evidence