Yogesh W. More, Sunil U. Tekale, Nitishkumar S. Kaminwar, László Kótai, Tibor Pasinszki, Pravin S. Kendrekar and Rajendra P. Pawar* Pages 288 - 293 ( 6 )
Aim and Objective: The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity.
Materials and Methods: Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes.
Results: The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation.
Conclusion: Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.
Cu-NP/C, dihydropyrano[c]chromenes, multicomponent reaction, catalyst, green solvent, one-pot synthesis.
Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), Lal Bahadur Shastri Mahavidyalaya, Dharmabad, Nanded (Maharashtra), Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, H-1519, Department of Chemistry, School of Pure Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu 7222, Department of Health Sciences, Central University of Technology, Bloemfontein, Free State-9300, Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra)