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超声波和Zn/蒙脱石-ZnCl_2使芳香醛片呐醇化 被引量：2

Pinacolization of aromtic aldehydes using Zn/montmorillonite-ZnCl_2 and ultrasound
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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.
作者 刘清福 翟建华 庞国勋
机构地区 邢台学院化学系 河北科技大学国际交流与合作处 河北省人民医院药剂室
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
关键词 ZNCL2 芳香醛 偶联反应 产率 对甲基苯甲醛 醇化 二氯苯 化学选择性 水溶液 蒙脱石 pinacllization aromtic aldehyde ultrasound
分类号 N941.5 [自然科学总论—系统科学] O625 [理学—有机化学]
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参考文献12

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共引文献34

同被引文献25

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河北科技大学学报
2005年 第1期

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