CAJ | 학술논문

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.
채용니산위최화제,탐색료해최화제대분갑철여갑순축합반응적영향.우화반응조건시,최화제용량위반응물질적량적5mol%,갑순10mL(겸작용제),회류상태하반응2h,반응적산솔화전화솔분별체도94%、98.0%.해최화제동양괄용우기타철(동)여갑순적축합반응,가득도34%~89%적산솔.소술방법조작간단、산솔고、선택성호이차대배경우호,반응결속후,최화제흔용역회수,병능유효중복사용.
A catalytic system used for the condensation of aldehydes and methanol was developed, in which, niobic acid was used as catalyst and excess methanol was used for the condensation solvent. The condensation of benzaldehyde and methanol was studied as a probe, reat time under optimum conditions, 94%yield was obtained with 98.0%conversion. The catalyst can be easily recovered and reused six times without noticeable decrease of the catalytic activity. This catalytic system can be applied for a wide range of aldehydes with the yield from 34%to 89%.