The perfume 2-heptyl-1,3-dioxolane was synthesized by the condensation reaction of n-octyl aldehyde ( A) with ethylene glycol ( B) in the presence of a composite catalyst which is composed of p-methyl benzene sulfonic acid and cupric sulfate. 在对甲苯磺酸和硫酸铜复合催化剂存在下,以正辛醛(A)和乙醇(B)为原料经脱水缩合合成了新型香料2-庚基-1,3二口恶戊烷。