A Facile One‐Pot Synthesis of Functionalized 1,5‐Dihydro‐2H‐[1]benzopyrano[2,3‐b]pyridin‐5‐ones |
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| Authors: | Abbas?Ali Esmaeili Omid Ghareghani |
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| Institution: | Department of Chemistry, University of Birjand, P.?O. Box 97175/615, Birjand, Iran, (fax: (00?98?561)?2230009) |
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| Abstract: | The highly reactive 1 : 1 intermediate generated in the reaction between dialkyl acetylenedicarboxylate (=but‐2‐ynedioic acid dialkyl ester) 4 and triphenylphosphine was trapped by 2‐amino‐4‐oxo‐4H‐1‐benzopyran‐3‐carboxaldehydes 5 to yield highly functionalized dialkyl‐1,5‐dihydro‐5‐oxo‐1‐phenyl‐2H‐1]benzopyrano2,3‐b]pyridine‐2,3‐dicarboxylates in high yield. |
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| Keywords: | 2H‐[1]Benzopyrano[2 3‐b]pyridines 5‐oxo‐1 5‐dihydro‐ Wittig reactions |
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