Ionic liquids as a recyclable reaction medium for the Baylis-Hillman reaction

被引:148
作者
Rosa, JN [1 ]
Afonso, CAM [1 ]
Santos, AG [1 ]
机构
[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Ctr Quim Fina & Biotecnol, Dept Quim, P-2825114 Monte De Caparica, Portugal
关键词
D O I
10.1016/S0040-4020(01)00316-7
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The Baylis-Hillman reaction using 1,4-diazabicyclo[2.2.2]octane (DABCO) has been shown to be 33.6 times faster in the recyclable ionic liquid 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]) than in acetonitrile. Low yields (14-20%) of adducts an obtained from aliphatic aldehydes and moderate to high yields (39-72%) from aromatic aldehydes. Recycling and reuse of the reaction medium was demonstrated. (C) 2001 Elsevier Science Ltd. All rights reserved.
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收藏
页码:4189 / 4193
页数:5
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