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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/022/06/0400-0404

    • Keywords

       

      Pyridine; Glacial Acetic Acid; Malonic Acid; Quantitative Yield; Silver Salt

    • Abstract

       

      The condensation ofp-tolylaldehyde with malonic acid by the pyridinetrace method gave, on repetition, a nearly quantitative yield of thep-tolylideneacrylic (p-methylcinnamic) acid.p-Tolylidenemalonic acid has been isolated for the first time in this condensation, in the absence of pyridine, in 75% yield.

      m-Tolyladehyde, on condensation with malonic acid in the presence of pyridine in traces, gave up to 68% of them-methylcinnamic acid. By a longtime-room-temperature condensation in the presence of both pyridine and piperidine, the yield came up to the theoretical. Them-tolylidenemalonic acid came out best in the presence of glacial acetic acid, but the yield was not great, being =48%.

    • Author Affiliations

       

      Prem Narain Agarval1 Kantilal C Pandya1 Indra Lal Tripath1

      1. Chemistry Laboratory, St. John’s College, Agra
    • Dates

       
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