Synthesis of 4,4'-dihydroxyazobenzeneand 4'-Dihydroxyphenylazo-2-naphthol from Diazotised aniline and Anthocyanins from  Delonix regia flower

Lawrence Mark Leonard Ogboji; Oaikhena Zekeri Esezobor; Mulu Emmanuel Khan; John Ogbaji Igoli

doi:10.9734/CSJI/2017/35020

Research Article Open access CC BY 4.0

Synthesis of 4,4'-dihydroxyazobenzeneand 4'-Dihydroxyphenylazo-2-naphthol from Diazotised aniline and Anthocyanins from Delonix regia flower

Lawrence Mark Leonard Ogboji, Oaikhena Zekeri Esezobor, Mulu Emmanuel Khan, John Ogbaji Igoli

Chemical Science International Journal · pp. 1–5 · Published 24 Aug 2017

10.9734/CSJI/2017/35020

Abstract

The synthesis of 4-phenylazo phenol by coupling anthocyanins extracted from Delonix regia flowers with diazotised aniline is presented in this paper. Also reported here is the reduction of 4-phenylazo phenol to yield 4-aminophenol and coupling of 4-aminophenol to phenol and 2-naphthol which yielded 4,4'-dihydroxyazobenzene and 4'-hydroxyphenylazo-2-naphthol, respectively. The structures of the compounds were confirmed by 1H- and 13C-NMR spectroscopy after purification by column chromatography on silica gel.

Delonix regia anthocyanins 4-phenylazo phenol azo dyes

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Lawrence Mark Leonard Ogboji, Oaikhena Zekeri Esezobor, Mulu Emmanuel Khan, John Ogbaji Igoli (2017). Synthesis of 4,4'-dihydroxyazobenzeneand 4'-Dihydroxyphenylazo-2-naphthol from Diazotised aniline and Anthocyanins from Delonix regia flower. Chemical Science International Journal , 1–5. https://doi.org/10.9734/CSJI/2017/35020

Affiliations

Lawrence Mark Leonard Ogboji — Department of Chemistry, University of Agriculture, Makurdi, Nigeria
Oaikhena Zekeri Esezobor — Fakultät für Chemie und Pharmazie, University of Regensburg, Germany
Mulu Emmanuel Khan — Department of Chemistry, University of Agriculture, Makurdi, Nigeria
John Ogbaji Igoli — Department of Chemistry, University of Agriculture, Makurdi, Nigeria

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