反应详情

To a stirred sodium methoxide solution, previously prepared starting from 1.3 parts of sodium in 160 parts of methanol, are added 13 parts of 1-(4-fluorophenyl)-4-oxocyclohexanecarboxylic acid and the whole is stirred and refluxed for 1 hour. After cooling to room temperature, 22.8 parts of iodomethane are added dropwise. Upon completion, the whole is heated to reflux and stirring is continued overnight at reflux temperature. The reaction mixture is evaporated and the residue is taken up in trichloromethane. The organic phase is washed successively with water, a 5% sodium hydroxide solution and again with water, dried, filtered and evaporated. The residue is purified by column-chromatography over silica gel using trichloromethane as eluent. The pure fractions are collected and the eluent is evaporated, yielding 5 parts (36%) of methyl 1-(4-fluorophenyl)-4-oxocyclohexanecarboxylate as an oily residue.

1. temperaturerefluxed for 1 hour
2. temperatureUpon completion, the whole is heated
3. temperatureto reflux
4. stirringstirring
5. temperatureat reflux temperature
6. customThe reaction mixture is evaporated
7. washThe organic phase is washed successively with water
8. dry with materiala 5% sodium hydroxide solution and again with water, dried
9. filtrationfiltered
10. customevaporated
11. customThe residue is purified by column-chromatography over silica gel
12. customThe pure fractions are collected
13. customthe eluent is evaporated