在三氟化硼乙醚溶液催化下，正辛醛与环氧溴丙烷首先反应生成2-庚基-4-溴甲基-1,3-二氧杂环戊烷，然后再与吡啶反应，研究合成了一种新型的含吡啶环的单阳离子表面活性剂（2-庚基-1,3-二氧杂环-4）甲烷-1-吡啶盐。产物结构经红外光谱和1HNMR分析表征并测定其电导率，该表面活性剂的临界胶束浓度为4.0×10-3 mol/L，表面活性强于传统表面活性剂。%Catalyzed by the ether solution of boron trilfuoride,n-octyl aldehyde reacted with epibromohydrin to produce 2-heptyl-4-bromomethyl-1,3-dioxolane. Then it was reacted with pyridine, thus a new type of single cationic surfactant containing pyridine ring, (2-heptyl-1,3-dioxane-4)-1-methane pyridine salt, was synthesized. The structure of resulting product was characterized by IR and 1HNMR. By the measurement of conductivity, the critical micelle concentration of this surfactant was 4.0×10-3 mol/L, which showed that its surface activity was stronger than that of traditional surfactants.
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