Oxidation of 4-methoxy-1-naphthol on promoted platinum catalysts
- Authors: Maphoru M.V.1, Heveling J.1,2, Kesavan Pillai S.3
-
Affiliations:
- Department of Chemistry
- Institute for Nano-Engineering Research
- National Centre for Nano-Structured Materials
- Issue: Vol 58, No 4 (2017)
- Pages: 441-447
- Section: Article
- URL: https://journal-vniispk.ru/0023-1584/article/view/163154
- DOI: https://doi.org/10.1134/S0023158417040103
- ID: 163154
Cite item
Abstract
Oxidative coupling of naphthols is a useful method for the formation of new carbon-carbon bonds in organic synthesis. In the presence of hydrogen peroxide, platinum supported on activated carbon catalyses this reaction. The outcome is influenced by the solvent, the reaction temperature and the physical structure of the catalyst. The catalyst structure is determined by the synthesis method and the modifier used (Bi or Sb). Within 40 min 4-methoxy-1-naphthol can be converted to 4,4'-dimethoxy-2,2'-binaphthalenyl-1,1'-diol with a yield of up to 94%, or to 4,4'-dimethoxy-2,2'-binaphthalenylidene-1,1'-dione with a yield of 92%. High amounts of quinoid byproducts (≤22%) are observed in nitromethane as the solvent.
Keywords
About the authors
M. V. Maphoru
Department of Chemistry
Email: hevelingj@tut.ac.za
South Africa, Pretoria, 0001
J. Heveling
Department of Chemistry; Institute for Nano-Engineering Research
Author for correspondence.
Email: hevelingj@tut.ac.za
South Africa, Pretoria, 0001; Pretoria, 0001
S. Kesavan Pillai
National Centre for Nano-Structured Materials
Email: hevelingj@tut.ac.za
South Africa, Pretoria, 0001
Supplementary files
