含硅有机锡化合物在缩醛反应中的催化性能

CATALYTIC PROPERTIES OF SILICON-CONTAINING ORGANOTIN COMPOUNDS IN ACETALIZATION

通过催化合成苯甲醛缩乙二醇和丁醛缩乙二醇的反应,考察了3种含硅三烃基锡化合物和2种含硅二烃基锡化合物在缩醛反应中的催化活性,并以丁醛与乙二醇的反应为例,讨论了催化剂用量、反应时间和溶剂等因素对反应的影响。实验结果表明,5种含硅有机锡化合物在缩醛反应中均表现出一定的催化活性;在丁醛与乙二醇的反应中,当n(丁醛):n(乙二醇)=1:1,三[(三甲基硅基)亚甲基]氯化锡用量为反应物料质量分数的1.8%,环己烷为带水剂,反应时间5 h时,丁醛缩乙二醇的收率可以达到88.6%。

The catalytic properties of silicon-containing trihydroxyltin and dihydroxyltin compounds were studied in the syntheses of benzaldehyde glycol acetal and butyraldehyde glycol acetal. The factors influencing the reaction, such as catalyst dosage, reaction time and types of solvents, were investigated based on the reaction of butyraldehyde and glycol. The results showed that all the five organotin compounds possessed certain catalytic activities. In the reaction of butyraldehyde and glycol, when n （butyraldehyde） ： n （glycol） = 1 ： 1, the amount of tri[（trimethylsilyl）methyl]tinchloride as catalyst was 1.8 % based on the mass of the reactants, cyclohexane as water carrying agent, and reaction time 5 h, the yield of butyraldehyde glycol acetal reached 88.6 %.