Sulfuric Acid → HCID 14305256, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 7 parts of 1-[phenyl(2-pyridinyl)methyl]-1H-imidazole-5-carboxylic acid, 5.5 parts of concentrated sulfuric acid and 140 parts of cyclohexanol was stirred for 2 days at 100° C. The reaction mixture was evaporated (at an oil pump) and the residue was taken up in dichloromethane. The organic layer was washed with a sodium hydroxide solution, dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (90:10 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from acetonitrile. The product was filtered off and dried in vacuo at 60° C., yielding 2.6 parts (28.8%) of cyclohexyl 1-[phenyl(2-pyridinyl)methyl]-1H-imidazole-5-carboxylate; mp. 161.0° C. (compound 1.255).

Provenance & Evidence