Ionic Liquids as Exceedingly Convenient Solvents for the Friedel–Crafts Monoalkylation of Electron-Rich Arenes with Paraformaldehyde Using HCl as Catalyst

被引：1

作者：

Pilar Formentín

Hermenegildo García

机构：

[1] Instituto de Technología Química CSIC-UPV,

来源：

Catalysis Letters | 2002年 / 78卷

关键词：

ionic liquid; Brönsted acid catalyst; Friedel–Crafts; benzylic alcohols;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Friedel–Crafts hydroxyalkylation of 2-methoxynaphthalene, anisole and 2-methylfuran with paraformaldehyde has been carried out in N-ethyl-N′-methylimidazolium chloride (1+Cl-) or N-butyl-N′-methylimidazolium hexafluorophosphate (2+PF-6) or ethanol using concentrated aqueous HCl as catalyst. The results have shown an extraordinary activity and selectivity towards the formation of the corresponding hydroxymethyl derivative using 2+PF-6 as solvent. This sharply contrasts with the case of the ethanol as solvent wherein the reaction is much slower and diarylation products are largely formed.

引用

页码：115 / 118

页数：3

共 43 条

[1]

Welton T.(1999)undefined Chem. Rev. 99 2071-2083

[2]

Wasserscheid P.(2000)undefined Angew. Chem. Int. Ed. 39 3772-3789

[3]

Keim W.(2000)undefined Green Chem. 2 296-297

[4]

Zulfiqar F.(2001)undefined J. Mol. Catal. A: Chem. 165 33-1255

[5]

Kitazume T.(2001)undefined J. Am. Chem. Soc. 123 1254-8976

[6]

Deng Y.(2000)undefined Tetrahedron Lett. 41 8973-1000

[7]

Shi F.(1999)undefined Org. Lett. 1 997-641

[8]

Beng J.(2001)undefined New J. Chem. 25 639-405

[9]

Qiao K.(2001)undefined Tetrahedron Lett. 42 403-67

[10]

Brown R.A.(2000)undefined J. Mol. Catal. A: Chem. 164 61-297

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