Dicyclohexylcarbodiimide → HCID 178455753, compound

Participants

Reaction Steps

First, 1.5 g (4.8 mmol) of 4-(trans-4-(trans-4-ethylcyclohexyl)cyclohexyl)benzoic acid, 0.8 g (4.8 mmol) of 3,5-difluoro-4-fluoromethylphenol, 0.2 g (1.4 mmol) of DMAP, and 25 ml of dichloromethane were mixed. To this mixture was added dropwise 5 ml of dichoromethane solution containing 1.2 g (5.7 mmol) of DCC at room temperature in 5 minutes, and reacted as they were while stirring for 12 hours. The crystal thus precipitated were filtered off. Toluene in an amount of 30 ml was added to the filtrate, and washed with 2N-sodium hydroxide 5 times and water thrice, and then dried over anhydrous magnesium sulfate. Solvent was distilled off at a reduced pressure and the residue was subjected to a silica gel column chromatography (eluent: toluene) to obtain 2.1 g of a crude 3,5-difluoro-4-fluoromethylphenyl 4-(trans-4-(trans-4-ethylcyclohexyl) cyclohexyl)benzoate. This product was recrystallized from a mixed solvent of heptane/ethyl (1/1) acetate to obtain 1.9 g (yield: 86.3%) of the subject compound.

Provenance & Evidence