反应详情

3,5-dimethylbenzamide (50 g, 0.3356 M) was suspended in benzene (400 mL). Thionyl chloride (49 mL, 0.671 M) and DMF (2 mL) were added and the mixture was refluxed for 2 hr. After cooling to room temperature, the mixture was poured into a crushed ice. After 1 hr., the solution was neutralized by the addition of 6 N sodium hydroxide solution. The product was then extracted with ether, dried with anhydrous magnesium sulfate, filtered, and evaporated in vacuo to give a yellow solid. The crude product was then purified by silica gel column chromatography (eluent, EA:hexane (1:4)) to afford 42 g (95%) of 3,5-dimethylbenzonitrile as a yellow solid. m.p. 51-52° C. 1H NMR (300 MHz, CDCl3) δ 2.34 (6H, s), 7.21 (1H, s), 7.26 (2H, s).

1. temperaturethe mixture was refluxed for 2 hr
2. extractionThe product was then extracted with ether
3. dry with materialdried with anhydrous magnesium sulfate
4. filtrationfiltered
5. customevaporated in vacuo
6. customto give a yellow solid
7. customThe crude product was then purified by silica gel column chromatography (eluent, EA:hexane (1:4))