反应详情

温度

10 °C

Benzaldehyde cyanohydrin (13.3 grams; 0.100 moles), 3,5-lutidine (11 grams) and methylene chloride (100 ml) were placed in a 500 ml. 3-necked glass reaction flask equipped with a mechanical stirrer, thermometer, condenser and addition funnel. This mixture was cooled to 10° C. by means of an ice bath and 2-methoxy-3,6-dichlorobenzoic acid chloride (23.9 grams; 0.10 moles) was added dropwise with the temperature of the mixture maintained at 5°-10° C. After the addition of the acid chloride was completed, the reaction mixture was stirred for an additional three hours at room temperature. After the reaction was completed, the mixture was washed three times with water, dried over anhydrous magnesium sulfate, filtered and concentrated by distillation. The residue was heated to a temperature of 150° C. under vacuum from a vacuum pump. Then the residue was dissolved in cyclohexane, treated with nuchar, filtered and stripped dry to give an oil.

1. custom3-necked glass reaction flask
2. customequipped with a mechanical stirrer
3. additionthermometer, condenser and addition funnel
4. temperaturemaintained at 5°-10° C
5. washthe mixture was washed three times with water
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated by distillation
9. temperatureThe residue was heated to a temperature of 150° C. under vacuum from a vacuum pump
10. dissolutionThen the residue was dissolved in cyclohexane
11. additiontreated with nuchar
12. filtrationfiltered
13. customstripped dry
14. customto give an oil