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考察了三苄基锡羧酸酯、磺酸酯、三苄基氯化锡、氧化双 (三苄基锡 )、二丁基氧化锡等 8种化合物对苯甲醛、庚醛与乙二醇缩合反应的催化性能 .结果发现 ,三苄基锡氯化物或氧化物中的氯或氧被取代后催化活性发生变化 ,酸根的吸电子能力越强 ,三苄基锡酯的催化活性也越高 .三苄基锡 3-羟基 - 4 -羧基苯磺酸酯的催化性能最好 ,在 90℃ ,催化剂用量 0 .2 % ,反应时间 2 h条件下 ,催化活性近 10 0 % ,选择性 96 %以上 .
The effects of eight compounds, such as tribenzyl tin carboxylate, sulfonate, tribenzyltin chloride, bis (tribenzyltin) oxide and dibutyltin oxide, on the condensation of benzaldehyde and heptanal with ethylene glycol The results showed that the catalytic activity of tribenzyltin chloride or oxide was changed after the substitution of chlorine or oxygen, and the stronger the electron-withdrawing ability of the acid radical was, the higher the catalytic activity of tribenzyl tin ester was. The catalytic activity of tribenzyl tin 3-hydroxy-4-carboxybenzenesulfonate was the best. Under 90 ℃, the amount of catalyst was 0.2% and the reaction time was 2 h, the catalytic activity was nearly 100% and the selectivity was 96% the above .