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A new and practical procedure for the synthesis of novel thieno[2,3-d]pyrimidines is described here. A series of thieno[2,3-d]pyrimidines was readily obtained from the corresponding aromatic and heterocyclic carboxylic acids using Montmorillonite K-10 dry media under microwave irradiation and solvent less conditions.
We express our thanks to Director of University Science Instrumentation Center, University of Delhi, Delhi for spectral analysis.
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