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Title: | An expeditious and greener one-pot synthesis of 4H-chromenes catalyzed by Ba(OTf)2 in PEG-water |
Authors: | Kumar, Anil |
Keywords: | Chemistry 4H-chromenes Barium triflate PEG-water 1,3-cyclohexanediones Three-component condensation |
Issue Date: | 31-Jan-2012 |
Publisher: | Taylor & Francis |
Abstract: | An expeditious synthesis of 4H-chromenes has been achieved by three-component one-pot condensation of 1,3-diketone, aldehyde, and malononitrile using Ba(OTf)2 as catalyst in PEG-water at room temperature. Results from various reaction media and different metal triflates as catalysts show that choice of proper catalyst and the solvent system play a key role in the synthesis of 4H-chromene-3-carbonitrile derivatives. The catalyst can be recovered and reused at least five times without loss of activity. The application of an eco-friendly, noncorrosive, and reusable catalytic system with high isolated yield of the products makes this method advantageous. |
URI: | https://www.tandfonline.com/doi/full/10.1080/17518253.2011.623683 http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/2912 |
Appears in Collections: | Department of Chemistry |
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