Synthesis and bactericidal activity of cationic surface-active agents containing an asymmetric nitrogen atom
作者:V. E. Limanov、S. B. Ivanov、T. B. Kruchenok、I. M. Tsvirova
DOI:10.1007/bf00776798
日期:1984.6
To separate the tertiary amines, the reaction mixture was treated with a mixture of acetic acid and acetic anhydride, excess of unreacted acetylating agent was removed, and the tertiary amines were isolated in the form of hydrochlorides. Dry hydrogen chloride was passed through the solution of the reaction mixture in ether or petroleum ether, or the reaction mixture was dissolved in a minimal amount
由于所得叔胺的沸点与初始仲烷基甲胺的沸点相似,因此发现在反应结束时通过蒸馏分离这些化合物的常用方法是不合适的。为了分离叔胺,将反应混合物用乙酸和乙酸酐的混合物处理,除去过量的未反应的乙酰化剂,并以盐酸盐的形式分离叔胺。将干燥的氯化氢通过反应混合物的乙醚或石油醚溶液,或将反应混合物溶解在最少量的盐酸中,用乙醚或石油醚从水溶液中萃取除去杂质。通过用碱水溶液处理,然后蒸馏有机层,从盐酸盐中分离游离胺。新获得的叔胺的特征在 Tmble i 中给出,并且