| zhangcaixia.Keggin型多金属氧酸盐催化醛与乙酸酐合成1,1-二乙酸酯[J].分子催化,2011,(1):64-68 |
| Keggin型多金属氧酸盐催化醛与乙酸酐合成1,1-二乙酸酯 |
| Synthesis of 1.1-diacetates under solvent-free by the Keggin |
| 投稿时间：2010-11-02 修订日期：2010-11-05 |
| DOI： |
| 中文关键词: 醛 催化 1,1-二乙酸酯 |
| 英文关键词:aldehyde catalyze 1,1-diacetates |
| 基金项目: |
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| 摘要点击次数: 1428 |
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| 中文摘要: |
| 合成了一系列具有Keggin结构的MxPW12O40?nH2O和MxPMo12O40?nH2O多金属氧酸盐(其中，M=Fe、Mn、Ni、Cu、Zn；x=1、1.5)，采用傅里叶变换红外光谱和X射线衍射等方法对其结构进行了表征；考察了醛与酸酐的摩尔比、催化剂用量、反应时间等反应条件对缩醛反应的影响。在优化条件下即FePW12O40用量0.034 mmol，反应时间5 min，n(aldehyde):n(Acetic Anhydrid)=1:3时，以59.15~94.85 %的收率生成相应的1,1-二乙酸酯。
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| 英文摘要: |
| A series of Keggin type heteropoly acids were synthesized. Their FT-IR and X-ray spectroscopy indicated that the catalyst structures were Keggin type. 1,1-diacetates was efficiently synthesized over MxPW12O40•nH2O and MxPMo12O40•nH2O catalysts（M=Fe、Mn、Ni、Cu、Zn；x=1、1.5）. Experimental results showed that a series of aldehydes could react with acetic anhydride to produce corresponding 1,1-diacetates at room emperature under solvent-free conditions by using heteropoly acid as catalyst, Among the tested catalysts. FePW12O40 is thebest one and under optimum conditions, i.e., FePW12O40 catalyst amount, 0.034 mmol; reaction time5 min, molar ratio of Aldehyde and Acetic Anhydride=1：3, and 59.19-94.85% yield of the corresponding 1,1-diacetates could be obtained.
Key words: aldehyde; catalyze; 1,1-diacetates
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