期刊
TETRAHEDRON
卷 69, 期 3, 页码 1074-1085出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2012.11.068
关键词
Potassium phthalimide-N-oxyl (POPINO); Transition metal-free catalysis; Multi-component reactions (MCRs); 2-Amino-4H-chromene; Green chemistry
资金
- Research Council of Iran University of Science and Technology (IUST), Tehran, Iran [160/354]
A wide variety of 2-amino-4H-chromene derivatives with diverse substituents on the 4H-chromene ring were efficiently prepared via one-pot, three-component reaction of an aromatic aldehyde, malononitrile (or ethyl cyanoacetate), and diverse enolizable C-H activated acidic compounds in the presence of low loading of potassium phthalimide-N-oxyl (POPINO), as a new organocatalyst, in aqueous media. This procedure is a clean, transition metal-free, and environmentally friendly approach to prepare different 2-amino-4H-chromen derivatives that offers many advantages including short reaction time, high to quantitative yields, low cost, and straightforward work-up. (C) 2012 Elsevier Ltd. All rights reserved.
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