Trifluoroacetic acid → (4'-{1-Ethyl-1-[3-methyl-4-(4,4,4-trifluoro-3-hydroxy-3-trifluoromethyl-1-butynyl)-phenyl]-propyl}-2'-methyl-biphenyl-4-yl)acetic acid methyl ester

Participants

Reaction Steps

Trifluoroacetic acid (0.2 mL) was added to a solution of (4′-{1-ethyl-1-[3-methyl-4-(4,4,4-trifluoro-3-methoxymethoxy-3-trifluoromethyl-1-butynyl)-phenyl]-propyl}-2′-methyl-biphenyl-4-yl)acetic acid methyl ester (Example 45-(1); 44.9 mg, 0.071 mmol) in dichloromethane (2 mL), and the mixture was stirred at room temperature for one hour. The reaction mixture was concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=4:1) to give the target compound as a colorless oil (20 mg, 48%).

Provenance & Evidence