| 离子液体存在下脂肪醛的环化三聚反应 |
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| 引用本文： | 于心玉,刘彩华,杨建国,何鸣元. 离子液体存在下脂肪醛的环化三聚反应[J]. 中国化学, 2006, 24(8): 1066-1068. DOI: 10.1002/cjoc.200690199 |
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| 作者姓名： | 于心玉 刘彩华 杨建国 何鸣元 |
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| 作者单位： | Shanghai Key Laboratory of Green Chemistry and Chemical Process East China Normal University，Shanghai 200062，Shanghai Key Laboratory of Green Chemistry and Chemical Process，East China Normal University，Shanghai 200062，Shanghai Key Laboratory of Green Chemistry and Chemical Process，East China Normal University，Shanghai 200062，Shanghai Key Laboratory of Green Chemistry and Chemical Process，East China Normal University，Shanghai 200062 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(No.G2000048). |
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| 摘 要： | Aliphatic aldehydes such as ethanal,propanal,n-butanal,isobutyraldehyde,n-valeraldehyde,isovaleraldehyde,n-hexanal and n-octanal were converted into the corresponding 2,4,6-trialkyl-1,3,5-trioxanes through cyclotrimer-ization in the presence of the ferric chloride based ionic liquids at room temperature without solvent in high selec-tivity.The effects of different ionic liquids,acidity of ionic liquids and temperature on cyclotrimerization were alsostudied.The results showed that the ferric chloride based ionic liquids(apparent molar fraction of FeCl_3(x(FeCl_3)=0.62))were a kind of efficient catalysts for the cyclotrimerization of aliphatic aldehyde which could be separatedconveniently from the reaction mixture and recycled without loss of catalytic activity.The conversion of isobu-tyraldehyde and the selectivity to 2,4,6-triisopropyl-1,3,5-trioxane were 91.1% and 99.8% respectively under opti-mum reaction condition(isobutyraldehyde 25.0 g,[Et_3NH]Cl/FeCl_3(x(FeCl_3)=0.62)1.0 g,25 ℃for 1 h).
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| 关 键 词： | 脂肪族醛 环三聚作用 2 4 6-三烃基-1 3 5-三环氧乙烷 离子液体 催化 |
| 收稿时间： | 2005-10-17 |
| 修稿时间： | 2005-10-172006-04-24 |
Cyclotrimerization of Aliphatic Aldehydes Catalyzed by Ionic Liquids |
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| YU Xin-Yu, LIU Cai-Hua, YANG Jian-Guo,HE Ming-Yuan. Cyclotrimerization of Aliphatic Aldehydes Catalyzed by Ionic Liquids[J]. Chinese Journal of Chemistry, 2006, 24(8): 1066-1068. DOI: 10.1002/cjoc.200690199 |
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| Authors: | YU Xin-Yu LIU Cai-Hua YANG Jian-Guo HE Ming-Yuan |
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| Affiliation: | Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai 200062 |
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| Abstract: | Aliphatic aldehydes such as ethanal, propanal, n‐butanal, isobutyraldehyde, n‐valeraldehyde, isovaleraldehyde, n‐hexanal and n‐octanal were converted into the corresponding 2,4,6‐trialkyl‐1,3,5‐trioxanes through cyclotrimer‐ ization in the presence of the ferric chloride based ionic liquids at room temperature without solvent in high selectivity. The effects of different ionic liquids, acidity of ionic liquids and temperature on cyclotrimerization were also studied. The results showed that the ferric chloride based ionic liquids (apparent molar fraction of FeCl3 (x(FeCl3)=0.62)) were a kind of efficient catalysts for the cyclotrimerization of aliphatic aldehyde which could be separated conveniently from the reaction mixture and recycled without loss of catalytic activity. The conversion of isobutyraldehyde and the selectivity to 2,4,6‐triisopropyl‐1,3,5‐trioxane were 91.1% and 99.8% respectively under optimum reaction condition (isobutyraldehyde 25.0 g, [Et3NH]Cl/FeCl3 (x(FeCl3)=0.62) 1.0 g, 25 °C for 1 h). |
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| Keywords: | aliphatic aldehyde cyclotrimerization 2 4 6-trialkyl-1 3 5-trioxane ionic liquid |
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