反应详情

In 25 ml of methanol, 1.0 g of 4-trifluoromethylcyclohexanecarboxylic acid was dissolved. Thereto 50 mg of concentrated hydrochloric acid was added and the mixture was heated under reflux for 10 hours. After the reaction mixture was cooled to room temperature, water was added thereto and the mixture was extracted with t-butyl methyl ether. The organic layer was washed with aqueous saturated sodium chloride, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to obtain 0.83 g of methyl 4-trifluoromethylcyclohexanecarboxylate (cis/trans ratio 7/1).

1. temperaturethe mixture was heated
2. temperatureunder reflux for 10 hours
3. extractionthe mixture was extracted with t-butyl methyl ether
4. washThe organic layer was washed with aqueous saturated sodium chloride
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure