Journal
TETRAHEDRON LETTERS
Volume 52, Issue 38, Pages 4835-4839Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2011.07.016
Keywords
Copper nanoparticles; Oxazinone; Condensation reaction; Nanocatalysis; Polyethyleneglycol
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Funding
- Department of Science & Technology (DST)
- Council of Scientific Industrial Research (CSIR), Government of India
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An efficient methodology employing copper nanoparticles for the preparation of 2-naphthol condensed 1,3-oxazinone derivatives employing one-pot condensation reaction in the presence of K2CO3 and copper nanoparticles in PEG-400 is described which offers several advantages, viz, high yields, clean reaction, short reaction times, recyclability of the catalyst and simple workup procedure. PEG-400 was found to be the best solvent out of a range of solvents examined for this scheme. Moreover, PEG could stabilize the nanoparticles from oxidation and thus could increase the catalyst efficiency by escalating the TON (Turn over Number) and TOF (Turn over Frequency) of the catalyst, making the protocol greener, eco-friendly and environmentally benign. (C) 2011 Elsevier Ltd. All rights reserved.
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