Supported and liquid phase task specific ionic liquids for base catalysed Knoevenagel reactions

被引：70
作者：
Paun, C.
Barklie, J.
Goodrich, P.
Gunaratne, H. Q. N.
McKeown, A.
Parvulescu, V. I.
Hardacre, C. [1 ]
机构：
[1] Queens Univ Belfast, Sch Chem & Chem Engn, QUILL, Belfast BT9 5AG, Antrim, North Ireland
[2] Univ Bucharest, Dept Chem Technol & Catalysis, Bucharest 030016, Romania
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2007年 / 269卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
supported; task specific; ionic liquids; basic; Knoevenagel;
D O I：
10.1016/j.molcata.2007.01.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of Hunig's base tethered ammonium ionic liquids have been used to catalyse the Knoevenagel condensation of aldehydes/ketones with malononitrile and ethyl cyanoacetate. The reactions were performed under homogeneous and under biphasic, liquid-liquid and liquid-silica supported ionic liquid, conditions with the biphasic systems employing cyclohexene as the second phase. By increasing the distance between the ammonium head group and Hunig's base the activity of the catalyst was found to increase. Higher activity, in general, was found under homogeneous reaction conditions; however, the recyclability of the catalyst was improved by supporting the BIL under biphasic conditions. (c) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：64 / 71
页数：8
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