超声辐射相转移催化合成肉桂酸苄酯

实验以水为溶剂,肉桂酸和氯化苄为原料,在相转移催化剂十六烷基三甲基溴化铵(CTAB)的作用下通过超声辐射液相合成法合成了肉桂酸苄酯,产物经IR和元素分析表征,并考察了原料配比、反应液pH值、超声波辐射时间、超声波辐射功率、相转移催化剂种类和用量对产品收率的影响。结果表明,合成肉桂酸苄酯的优化工艺条件为:n(肉桂酸)∶n(氯化苄)=1∶1.4,反应液pH值为11,CTAB用量2.0g,反应温度70℃,超声辐射时间120min,超声辐射功率120W,在此条件下收率可达88.5%。

SYNTHESIS OF BENZYL CINNAMATE WITH PHASE TRANSFER CATALYSIS UNDER ULTRASONIC IRRADIATION

The benzyl cinnamate was synthesized from cinnamic acid and benzyl chloride in distilled water with phase transfer catalyst(PTC) of CTAB under ultrasonic radiation,and it was characterized via IR Spectrum and electrochemical analysis.The effects of various factors,such as material ratio,pH value of reaction solution,the reaction time,the power of ultrasound,the kinds and the amounts used of PTC,on the product yield were investigated.and the optimal reaction conditions were acquired as follows: n(cinnamic acid)∶n(benzyl chloride)=1∶1.4,the reaction liquid pH value was 11 and catalyst dosage was 2.0 g at reaction temperature of 70 ℃ for 120 min reaction time and the power of ultrasound of 120 W.The yield of benzyl cinnamate could be up to 88.5%.