Synthesis of a novel biological-based glycoluril with phosphorous acid tags: Application for synthesis henna-based compounds

In recent years, there is a great interest in the design and synthesis of easy and safe chemicals and chemical processes [1-2]. Especially the design of new catalysts andcatalytic systems from the viewpoint of green chemistry disciplines are more demand. Among of catalysts, heterogeneous solid catalysts are promising materials widely used when trying to develop simple catalytic and eco-friendly processes due to their easy recyclability by a simple filtration and/or centrifugation, and the potential for reusing as the most important issues [3-5]. In recent years, researchers are interested in nano-catalysts because of their high specific surface area and hence the high activity and selectivity usually shown by these materials. In this work the synthesis and characterization of a new glycoluril tetrakis(methylene phosphorous acid) (GTMPA)-derived solid acid nano-catalyst will be presented. Also, we wish to present an efficient and green catalyzed MCR towards the synthesis of 3-methyl-1,4- diphenyl-1,4-dihydrobenzo[6,7]chromeno[2,3-c]pyrazole-5,10-dione derivatives