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An efficient strategy for N-alkylation of benzimidazoles/imidazoles in SDS-aqueous basic medium and N-alkylation induced ring opening of benzimidazoles
A CHAKRABORTY, S DEBNATH, , , S MAJUMDAR
Published in Elsevier Ltd
2018
Volume: 74
   
Issue: 40
Pages: 5932 - 5941
Abstract
A sustainable route for the N-1 alkylation of imidazole and benzimidazole derivatives has been developed under volatile organic solvent free condition in alkaline water-SDS system. Incorporation of SDS in the reaction medium enhances the reaction rate by suppressing the solubility issue that arises for different substrates. This method provides high yield of the alkylated product in a shorter reaction time. For reactive alkyl halides reaction proceeds at ambient temperature whereas in the cases of less reactive alkyl halides require 55–60 °C to complete alkylation process. N-alkylation induced ring opening of the heterocyclic ring in benzimidazole derivatives to multifunctional aromatic compounds were noticed at 60 °C when more than two equivalents of alkyl halide was used. © 2018 Elsevier Ltd
About the journal
JournalData powered by TypesetTetrahedron
PublisherData powered by TypesetElsevier Ltd
ISSN0040-4020
Open AccessNo