反应详情

0.68 g (2.27 mmol) of methyl 4-[4-(2-dimethylaminoethoxy)phenyl]benzoate was dissolved in 18 ml of methanol-methylene chloride (5:1 (v/v)). 3.4 ml of a 1N sodium hydroxide aqueous solution was added thereto and the mixture was refluxed under heating for 5 hours. After cooling to room temperature, 3.4 ml of 1N hydrochloric acid was added and stirred. The precipitate thus formed was collected by filtration, washed, and dried to obtain 0.54 g (1.89 mmol) of 4-[4-(2-dimethylaminoethoxy)phenyl]benzoic acid as faint yellowish white powder. ##STR22## Its spectroscopic data are as follows:

1. temperaturethe mixture was refluxed
2. temperatureunder heating for 5 hours
3. customThe precipitate thus formed
4. filtrationwas collected by filtration
5. washwashed
6. customdried