ethyl 2-[(3R)-piperidin-3-yl]acetate → ethyl 2-((3R)-1-(2-hydroxy-2-(3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazol-7-yl)ethyl)piperidin-3-yl)acetate

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-(oxiran-2-yl)-3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazole (Preparation 13A, 150 mg, 0.353 mmol) and (R)-ethyl 2-(piperidin-3-yl)acetate (90 mg, 0.526 mmol) in 2-propanol (5 mL) was stirred at 85° C. under a nitrogen atmosphere for 5 hr. The reaction mixture was concentrated and purified by silica gel column chromatography using ethyl acetate/heptane followed by 10% methanol in ethyl acetate to afford ethyl 2-((3R)-1-(2-hydroxy-2-(3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazol-7-yl)ethyl)piperidin-3-yl)acetate (125 mg, 0.210 mmol, 59.4% yield) as a yellow solid. LC/MS M+1=596.3.

Provenance & Evidence