Imidazolium-Based Phosphinite Ionic Liquid (IL-OPPh2) as Reusable Catalyst and Solvent for the Knoevenagel Condensation Reaction

被引：29
作者：
Valizadeh, Hassan [1 ]
Gholipour, Hamid [1 ]
机构：
[1] Azarbaijan Univ Tarbiat Moallem, Dept Chem, Fac Sci, Tabriz, Iran
来源：
SYNTHETIC COMMUNICATIONS | 2010年 / 40卷 / 10期
关键词：
Coumarin; ionic liquid; Knoevenagel; task-specific; DERIVATIVES; EFFICIENT; COUMARINS; ACID;
D O I：
10.1080/00397910903097310
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
A task-specific ionic liquid (IL, OPPh2) that bears a phosphinite weak Lewis base group in an imidazolium cation was found to efficiently catalyze the Knoevenagel condensation of arylaldehydes with malononitrile, dimethyl(diethyl)malonate, and ethyl cyanoacetate. This IL plays a dual role as both the reaction media and also catalyst, and it can be easily recovered and reused in several runs. Satisfactory results were obtained with good yields, short reaction time, and simplicity in the experimental procedure. A variety of coumarin derivatives were synthesized in this procedure.
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收藏
页码：1477 / 1485
页数：9
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