含硅四烃基二锡氧烷的合成及其催化性能

Synthesis and Catalytic Properties of Tetraorganodistannoxanes Containing Silicon

合成了3个含硅四烃基二锡氧烷化合物,并通过乙酸与异戊醇的反应和丁醛与乙二醇的反应,考察了它们在酯化反应和缩醛化反应中的催化活性,讨论了催化剂用量、反应时间和溶剂等因素对催化反应的影响。结果表明,与二氯代四丁基二锡氧烷相比,3种含硅四烃基二锡氧烷在酯化反应和缩醛化反应中均表现出类似的高催化活性;催化剂[ClBu2SnOSn(CH2SiMe3)2Cl]2用量为反应物料质量的1.5%时,乙酸异戊酯的产率为91.8%,丁醛缩乙二醇的产率为94.2%。在四烃基二锡氧烷结构中,锡原子上的烃基或桥联基团的不同,对其催化活性均有一定程度的影响。

Three tetraorganodistannoxanes containing silicon were synthesized and their catalytic properties in esterification and acetalization were observed via the reactions of acetic acid with isoamyl alcohol and butyraldehyde with glycol. The factors affecting the reaction, such as the catalyst dosage, reaction time and solvent kind, etc. were discussed. The results show that three tetraorganodistannoxanes displayed similar good catalytic activities compared to dichlorotetrabutyldistannoxane in the esterification and aeetalization. When the dosage of [ ClBu2SnOSn（ CH2SiMe3 ）2Cl]2 was 1.5% based on the mass of the reactant, the yield of isoamyl acetate was 91.8% , and the yield of butyraldehyde glycol acetal 94.2%. The different alkyl and bridging groups on Sn sites in the structure of the tetraorganodistannoxanes showed influences, to a certain extent, on the catalytic activities of these compounds.