采用铌酸为催化剂,探索了该催化剂对苯甲醛与甲醇缩合反应的影响。优化反应条件是,催化剂用量为反应物质的量的5mol%,甲醇10mL(兼作溶剂),回流状态下反应2h,反应的产率和转化率分别达到94%、98.0%。该催化剂同样适用于其他醛(酮)与甲醇的缩合反应,可得到34%~89%的产率。所述方法操作简单、产率高、选择性好而且对环境友好,反应结束后,催化剂很容易回收,并能有效重复使用。 Using niobic acid as a catalyst, the effect of the catalyst on the condensation of benzaldehyde with methanol was explored. The optimized reaction conditions were as follows: the amount of catalyst was 5mol% of the reaction mass and 10mL of methanol (also doubly as solvent). The reaction was carried out under reflux condition for 2h. The yield and conversion of the reaction reached 94% and 98.0% respectively. The catalyst is also suitable for the condensation reaction of other aldehydes (ketones) with methanol, yielding 34% to 89%. The method is simple in operation, high in yield, good in selectivity and environment-friendly. After the reaction is over, the catalyst is easily recovered and can be effectively reused.