A Low-cost Manganese Complex Catalyst for Phenolic Coupling and Further Oxidation of Phenols

Authors

  • Department of Chemistry, College of Science, University of Basrah, Basrah 61004, Iraq
  • College of Agriculture, University of Misan, Al-Amara, Misan 62001, Iraq.
  • Department of Chemistry, College of Science, University of Basrah, Basrah 61004, Iraq

DOI:

https://doi.org/10.32792/jeps.v12i2.228

Keywords:

Catalyst, Phenolic oxidation, Manganase complexes

Abstract

Binuclear manganese (Mn) complexes have been prepared as selective oxidants. Here, the oxidative
coupling of phenols under manganese (Mn)-catalyzed conditions were described to form biphenols,
ortho-quinones and benzoxepines. Manganese(III) picolinate (Mn (III) (PIC)3 H2O, complex (1) is used as
a low- cost and easy to prepare catalyst which activates by periodic acid and some organic substrates can
be oxidized after the activation process proposing that the manganese is converted to a higher oxidation
state. In this study, catalytic oxidation reactions from a mononuclear Mn complex can be used to perform
manganese catalysis that usually requires a binuclear complex. The formation of biphenols was
successfully determined by using 1HNMR.

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Published

2023-03-01