Bifunctional Cs−Au/Co3O4 (Basic and Redox)-Catalyzed Oxidative Synthesis of Aromatic Azo Compounds from Anilines

Charles O. Oseghale, Dele Peter Fapojuwo, Oyekunle Azeez Alimi, Christianah Aarinola Akinnawo, Batsile M. Mogudi, Oluwatayo Racheal Onisuru, Reinout Meijboom

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

An eco-friendly alkali-promoted (Cs−Au/Co3O4) catalyst, with redox and basic properties for the oxidative dehydrogenative coupling of anilines to symmetrical and unsymmetrical aromatic azo compounds, was developed. We realized a base additive- and molecular O2 oxidant-free process (using air), with reasonable reusability of the catalyst achieved under milder reaction conditions. Notably, the enhanced catalytic activity was also linked to the increased basic site concentration, low reduction temperatures, and the effect of lattice oxygen on the nanomaterials. The increased basic strength of the cation-promoted catalyst improved the electron density of the active Au species, resulting in higher yields of the desired aromatic azo compounds.

Original languageEnglish
Pages (from-to)5063-5073
Number of pages11
JournalEuropean Journal of Organic Chemistry
Volume2021
Issue number36
DOIs
Publication statusPublished - 24 Sept 2021

Keywords

  • Alkali cations
  • Aniline
  • Basicity gold
  • Oxidation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry

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