• A single-step synthesis of methyl ethers of dihydro alloptaeroxylin, dihydro spathelia chromene and related dihydro pyrano coumarin derivatives

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      https://www.ias.ac.in/article/fulltext/jcsc/109/01/0021-0025

    • Keywords

       

      2,2-Dimethyl-2H-pyrano-coumarins and -chromones; ethyl acetoacetate; condensation

    • Abstract

       

      Treatment of hydroxy-2,2-dimethyl chromans1,4,8 with ethyl acetoacetate (EAA) in the absence of any condensing agents afforded a mixture of dihydropyrano coumarins and dihydropyrano chromones,2+3,5+6 and9+10 respectively. Demethylation of methyl ethers of dihydro-spatheliachromene (6) and-alloptaeroxylin (10) using anhydrous AlCl3-CH3CN yielded the correspond chromans,7 and11.

    • Author Affiliations

       

      P E Kumar1 K J Rajendra Prasad1

      1. Department of Chemistry, Bharathiar University, Coimbatore - 641 046, India
    • Dates

       
  • Journal of Chemical Sciences | News

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