Pyrrolidine → Tert-butyl 6-[({2'-cyano-4'-[(methoxycarbonyl)methyl]-1,1'-biphenyl-4-yl}oxy)methyl]-2-hydroxy-3-(trifluoromethyl)benzoate

Participants

Reaction Conditions

Reaction Steps

Pyrrolidine (33 μl, 0.39 mmol) was added to a solution of crude tert-butyl 2-[(tert-butoxycarbonyl)oxy]-6-[({2′-cyano-4′-[(methoxycarbonyl)methyl]-1,1′-biphenyl-4-yl}oxy)methyl]-3-(trifluoromethyl)benzoate (125 mg) obtained in the above in 1,4-dioxane (4 ml), and the mixture was stirred at 50° C. for 2 hours. The residue obtained by removing the solvent under reduced pressure was purified by silica gel preparative thin layer chromatography (developing solvent: n-hexane/ethyl acetate=5/1) to give tert-butyl 6-[({2′-cyano-4′-[(methoxycarbonyl)methyl]-1,1′-biphenyl-4-yl}oxy)methyl]-2-hydroxy-3-(trifluoromethyl)benzoate (100 mg, 60%).

Provenance & Evidence