碘掺杂聚苯胺催化合成苯甲醛-1,2-丙二醇缩醛

Catalytic synthesis of benzaldehyde 1,2-propylene acetal by the catalyst of polyaniline doped with iodine

自制了PAn(聚苯胺)-I2(碘)催化剂,并对其结构进行了表征。通过苯甲醛和1,2-丙二醇为原料合成苯甲醛-1,2-丙二醇缩醛,探讨了PAn-I2催化剂对缩醛反应的催化活性,表明PAn-I2是合成苯甲醛-1,2-丙二醇缩醛的良好催化剂。系统地研究了原料配比、催化剂用量、带水剂用量、反应时间诸因素对产品收率的影响,在n苯甲醛∶n1,2-丙二醇=1∶1.5、催化剂用量为反应物料总质量的0.98%、带水剂环己烷用量为14mL、反应时间2h的优化条件下,苯甲醛-1,2-丙二醇缩醛的收率可达91.0%。

A new environmentally-friendly catalyst, PAn-I2 was prepared. Benzaldehyde 1,2-prepylene acetal was synthesized from benzaldehyde and 1,2-propylene alcohol in the presence of polyaniline doped with iodine. Factors influencing the product yield were discussed and optimum reaction conditions were found. Experimental result showed that polyaniline doped with iodine was an excellent catalyst. With n （benzaldehyde）/ n （ 1,2-prepylene）/= 1/1.5, w （polyaniline doped with iodine） = 0.98 %, cyclohexane 14mL and reaction time 2.0h, yield of benzaldehyde 1,2-prepylene acetal could reach 91 .0%.