Synthesis of Multifunctionalised 2-Substituted Benzimidazoles Using Copper II Hydroxide as Efficient Solid CatalystReportar como inadecuado




Synthesis of Multifunctionalised 2-Substituted Benzimidazoles Using Copper II Hydroxide as Efficient Solid Catalyst - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Here we demonstrate the synthesis of multifunctionalised benzimidazoles through the coupling of o-phenylenediamine with aldehydes by using Copper II hydroxide as an efficient solid catalyst in methanol at room temperature. The Copper II hydroxide solid catalyst gave better yields 80%-99% in short reaction time 4-8 h. These commercially available cheap catalysts are more active than many reported expensive heterogeneous catalysts. Using the Copper hydroxide fresh catalyst, the yield of product 3a was 98%, while the recovered catalyst in the three subsequent cycles gave the yield of 94%, 90% and 88% respectively.

 

KEYWORDS

o-Phenylenediamine; Aldehydes; Copper II Hydroxide; Solid Catalyst; Multifunctionalised Benzimidazoles

Cite this paper

M. Chari,  . Zaied-A-Mosaa, D. Shobha and S. Malayalama -Synthesis of Multifunctionalised 2-Substituted Benzimidazoles Using Copper II Hydroxide as Efficient Solid Catalyst,- International Journal of Organic Chemistry, Vol. 3 No. 4, 2013, pp. 243-250. doi: 10.4236-ijoc.2013.34035.





Autor: Murugulla Adharvana Chari, Zaied-A-Mosaa, Donthabakthuni Shobha, Sridhar Malayalama

Fuente: http://www.scirp.org/



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