Journal of Molecular Liquids

Room temperature ionic liquid choline chloride–oxalic acid: A versatile catalyst for acid-catalyzed transformation in organic reactions

UN Yadav, GS Shankarling

Index: Yadav, Urmiladevi Narad; Shankarling, Ganapati Subray Journal of Molecular Liquids, 2014 , vol. 191, p. 137 - 141

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Citation Number: 14

Abstract

Abstract An efficient and facile synthesis of hydrazones, bis (indolyl) methanes and bis (4- hydroxycoumarin) methanes is facilitated by room temperature ionic liquid choline chloride– oxalic acid (ChCl: Ox). ChCl: Ox (10 mol%) efficiently catalyzes condensation of aldehydes with phenylhydrazine giving corresponding hydrazones in high yield (92–96%) within short reaction time of 3–5 min. Electrophilic cyclization reaction of indole and 4-hydroxy ...