反应详情

To a solution of 5.50 g (23.5 mmoles) of 3,5-di-t-butylbenzoic acid in 25 ml of dry dimethylformamide was added 5.01 g (35.3 mmoles) of iodomethane, and then 6.49 g of anhydrous potassium carbonate. After stirring at room temperature for 2 hours, water was added, the mixture was extracted three times with diethyl ether, the combined organic extracts were washed with brine, dried over sodium sulfate, filtered, and evaporated to give 5.68 g of the title compound as a crystalline solid, m.p. 52.0°-52.5° C. The structural assignment was supported by 1H NMR.

1. extractionthe mixture was extracted three times with diethyl ether
2. washthe combined organic extracts were washed with brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. customevaporated