New Generation of Nitrite Functionalized Star-like Polyvinyl Imidazolium Compound: Application as a Nitrosonium Source and Three Dimensional Nanocatalyst for the Synthesis of Azo Dyes

Author(s): Ashkan Shomali, Hassan Valizadeh*, Saeideh Noorshargh.

Journal Name: Letters in Organic Chemistry

Volume 14 , Issue 6 , 2017

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Abstract:

Background: The compounds with three-dimensional and ionic structures have attracted considerable attentions because of their unique characteristics as a drug carrier and catalyst. Star-like poly ionic compounds are a new generation of three-dimensional structures which have both; the exclusive ionic features and three-dimensional structures. Recently, we reported the synthesis of diazonium salts from aniline derivatives using carboxyl and nitrite functionalized graphene quantum dots.

Methods: Nitrite-functionalized star-like polyionic (NFSP) compound was synthesized as a new generation of three-dimensional nanocatalyst. Herein, the use of NFSP as an efficient reagent and nanocatalyst for the diazotization of aniline derivatives and subsequent synthesis of azo dyes via the reaction with active phenolates under solvent-free conditions was reported.

Results: In order to demonstrate the positive impact of NFSP efficiency, the reaction times and yields of the products were compared with other methods and catalysts which have been reported previously. The brilliant performance of NFSP can be ascribed to multifunctional reagent and also trapping the ingredient within catalyst cavities.

Conclusion: A highly effective and cost-effective method has been developed for the preparation of azo dyes. In reported method, new three-dimensional catalyst with highly ionic characteristic and multifunctional nitrosonium source is available. These special features reduced the required amount of catalyst, reaction time and also increased the efficiency of catalyst.

Keywords: Azo dyes, heterogeneous catalyst, nanocatalyst, nitrosonium source, phenylazo derivatives, star-like ionic polymer.

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Article Details

VOLUME: 14
ISSUE: 6
Year: 2017
Page: [409 - 418]
Pages: 10
DOI: 10.2174/1570178614666170321125216
Price: $65

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