反应详情

523 g of the benzene sulfonamide of octylamine are dissolved in 1500 cc of anhydrous xylene. There are then introduced, with agitation, 835 cc of a 2.4 N ethanolic solution of sodium ethylate. The ethanol is then eliminated by distillation. While agitating the reaction mixture and maintaining its temperature at 100°-110° C., there are introduced over a one hour period 385 cc of methyl sulfate. The resulting mixture is heated at reflux for 4 hours. After cooling, the mineral salts formed are removed by filtration. There are then added to the filtrate 1500 cc of a concentrated aqueous solution of NaOH. The resulting mixture is decanted and the xylenic phase is washed 4 times with 1000 cc of water and then concentrated. The residue obtained is added to a mixture of 1400 g of concentrated sulfuric acid and about 560 g of crushed ice. The resulting mixture is then brought, with agitation, to 160° C. for 16 hours. After cooling, the reaction mixture is poured onto 3 kg of crushed ice and made alkaline by the addition of 3500 cc of a concentrated aqueous solution of NaOH, which is then extracted three times with 2000 cc of ethyl acetate. The organic phase is then washed with water, dried and concentrated under reduced pressure. The residue is distilled and the fraction distilling at 45°-50° C. under 0.2 mm Hg is recovered.

1. distillationThe ethanol is then eliminated by distillation
2. temperaturemaintaining its temperature at 100°-110° C.
3. additionthere are introduced over a one hour period 385 cc of methyl sulfate
4. temperatureThe resulting mixture is heated
5. temperatureat reflux for 4 hours
6. temperatureAfter cooling
7. customthe mineral salts formed
8. customare removed by filtration
9. additionThere are then added to the filtrate 1500 cc of a concentrated aqueous solution of NaOH
10. customThe resulting mixture is decanted
11. washthe xylenic phase is washed 4 times with 1000 cc of water
12. concentrationconcentrated
13. customThe residue obtained
14. temperatureAfter cooling
15. extractionis then extracted three times with 2000 cc of ethyl acetate
16. washThe organic phase is then washed with water
17. customdried
18. concentrationconcentrated under reduced pressure
19. distillationThe residue is distilled
20. distillationthe fraction distilling at 45°-50° C. under 0.2 mm Hg
21. customis recovered