反应详情

To these 17.9 g of the chloride of 3-chloro,4-methylbenzoic acid, dissolved in 60 ml of anhydrous benzene, were added 12.9 g of di-sec.butylamine dissolved in 15 ml of anhydrous C6H 6 and 12.3 g of triethylamine. The whole was then boiled to reflux temperature for 1 hour and was then left to cool down to room temperature. The reaction mass was then concentrated to dryness under reduced pressure. The residue was washed with acidulated H2O, with H2O and extracted with ethyl ether. The etheral extract was dried on anhydrous Na 2 SO4, filtered, and the solvent was then removed by reduced pressure. The oily residue was fractionally distilled at a pressure of 0.05 mm Hg. The fraction which passed over at 143°-144°C was collected. Thereby were obtained 26.5 g of 3-chloro,4-methyl-N,N-di-sec.butyl-benzamide.

1. temperatureto reflux temperature for 1 hour
2. waitwas then left
3. concentrationThe reaction mass was then concentrated to dryness under reduced pressure
4. washThe residue was washed with acidulated H2O, with H2O
5. extractionextracted with ethyl ether
6. extractionThe etheral extract
7. dry with materialwas dried on anhydrous Na 2 SO4
8. filtrationfiltered
9. customthe solvent was then removed by reduced pressure
10. distillationThe oily residue was fractionally distilled at a pressure of 0.05 mm Hg
11. custompassed over at 143°-144°C
12. customwas collected