Triethylamine → ethyl (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl)-1H-imidazol-5-yl]-2-(5-methyl-2-furyl)methyl-2-propenyl carbonate

Participants

Reaction Steps

To a solution of (E)-3-[2-n-butyl-1-{(2-chlorophenyl)methyl}-1H-imidazol-5-yl]-2-(5-methyl-2-furyl)methyl-2-propenol (6.86 mmol) in methylene chloride (20 mL) and triethylamine (12.4 mmol) cooled to 0° C. under argon is added dropwise ethyl chloroformate (1.34 g, 1.18 ml, 12 mmol). The reaction is then stirred at ambient temperature overnight. Ethyl acetate is added, the precipitate filtered and the concentrated filtrate is flash chromatographed over silica gel with 3:7 hexane/ethyl acetate to provide the title compound.

Provenance & Evidence