Redox Catalysis of Novel Heterocyclic o-Quinone Coenzymes

  • Shinobu Itoh
  • Hirokatsu Kawakami
  • Shunichi Fukuzumi
Conference paper


Quinones have been widely utilized as a redox catalyst or an electrochemical mediator in a variety of chemical reactions and electrochemical devices. In order to achieve high catalytic efficiency of such systems, developement of a highly reactive and robust catalyst is crucial. In this context, we have recently developed a series of heterocyclic o-quinone compounds that mimic the structures and functions of newly found coenzymes such as pyrroloquinolinequinone (PQQ) and tryptophan tryptophylquinone (TTQ).1 Here, we demonstrate that a calcium complex of a PQQ analog acts as a very efficient catalyst for the oxidation of simple alcohols such as methanol and ethanol under a very mild condition.2


Redox Catalysis Anhydrous Acetonitrile Calcium Complex CH3CN Solution Redox Catalyst 


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Copyright information

© Springer Japan 1998

Authors and Affiliations

  • Shinobu Itoh
    • 1
  • Hirokatsu Kawakami
    • 1
  • Shunichi Fukuzumi
    • 1
  1. 1.Department of Applied Chemistry, Faculty of EngineeringOsaka UniversitySuita, Osaka 565Japan

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