摘要
用超声波照射Zn/蒙脱石 ZnCl_2和含50%(质量分数)THF的一些芳香醛水溶液2~3h,芳香醛发生偶联反应,生成片呐醇,产率为23%~87%。2,4 二氯苯甲醛、β 苯基丙烯醛发生偶联反应时,片呐醇产率分别达到87.1%和74.8%;对甲基苯甲醛、糠醛发生偶联反应时,化学选择性较好;Zn/蒙脱石 ZnCl_2重复使用3次,活性无显著降低。
The coupling reaction aromtic aldehydes leading to pinacols were carried out by using Zn/montmorillonite-ZnCl_2 in 50% aqueous THF under ultrasound with 23%~87% yield.2,4-dichiorophenyl and β-benzaldehyde were coupled with 87.1% and 74.8% yields respectively.When occurs the reaction of pinacols p-methylbenzaldehyde and 2-furaldehyde , the chemistry selectivity is better; Zn/ montmorillonite-ZnCl_2 is repeatedly used for 3 times, with no active notable reduction. Contrasting experiment in progress goes deep into the study of this reaction . Its structure was characterized by IR, ~1H NMR and MS.The advantages of this method lie in moderate condition,high chemical selectivity,high yield and the reusability of the catalyst.
出处
《河北科技大学学报》
CAS
2005年第1期25-27,35,共4页
Journal of Hebei University of Science and Technology