A one-pot [Bmim]OH-mediated synthesis of 3-benzamidocoumarins |
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| Authors: | Lal Dhar S Yadav Santosh Singh Vijai K Rai |
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| Institution: | Green synthesis Lab, Department of Chemistry, University of Allahabad, Allahabad 211 002, India |
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| Abstract: | The first example of an ionic liquid-promoted one-pot synthesis of 3-benzamidocoumarins from salicylaldehydes and 2-pheny-1,3-oxazolan-5-one via Knoevenagel condensation-ring transformation cascades has been reported. No by-product formation, operational simplicity, ambient temperature and high yield (85-97%) are the salient features of the present synthetic protocol. After isolation of the product, the ionic liquid, Bmim]OH can be easily recycled for further use without any loss of efficiency. |
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| Keywords: | Ionic-liquids 3-Aminocoumarins Benzopyrans Atom-efficient Salicylaldehydes 2-Phenyl-1 3-oxazolan-5-one |
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