反应详情

温度

30 °C

p-Toluenesulphonic acid (13.55 g; 71.1 mmoles) was added to a refluxing solution of 27-stearoyloxyheptacosanoic acid (53.45 g; about 77.1 mmoles) and triethylamine (100 ml) in methylene chloride (2 l; free of alcohol) under nitrogen. After refluxing for 1 hour phytosphingosine (18.6 g; purity 94%; 55 mmoles) was added and refluxing was continued for 145 minutes. After cooling the reaction mixture to 30° C. the precipitate was filtered off and washed with methylene chloride (1 l). This solid was dissolved in hot, ethanol-free ##STR11## chloroform and filtered off while warm. The filtrate was allowed to cool. The precipitate formed was filtered off, washed with chloroform (250 ml) and acetone (2×200 ml) and dried in vacuo affording 41 g of the title product.

1. additionwas added
2. temperaturerefluxing
3. filtrationwas filtered off
4. washwashed with methylene chloride (1 l)
5. dissolutionThis solid was dissolved in hot, ethanol-free ##STR11## chloroform
6. filtrationfiltered off
7. temperaturewhile warm
8. temperatureto cool
9. customThe precipitate formed
10. filtrationwas filtered off
11. washwashed with chloroform (250 ml) and acetone (2×200 ml)
12. customdried in vacuo