Synthesis of mesoporous Ca-MCM catalysts and their use in suitable multicomponent synthesis of polyfunctionalized pyrans |
| |
| Authors: | Eliana Nope José J Martínez Hugo A Rojas Ángel G Sathicq Gustavo P Romanelli |
| |
| Institution: | 1.Centro de Investigación y Desarrollo en Ciencias Aplicadas ‘Dr. Jorge J. Ronco’ (CINDECA-CCT-CONICET),Universidad Nacional de La Plata,La Plata,Argentina;2.Escuela de Ciencias Químicas, Facultad de Ciencias,Universidad Pedagógica y Tecnológica de Colombia UPTC, Avenida Central del Norte,Tunja,Colombia;3.Cátedra de Química Orgánica, CISAV, Facultad de Ciencias Agrarias y Forestales,Universidad Nacional de La Plata,La Plata,Argentina |
| |
| Abstract: | Mesoporous Ca-MCM catalysts were prepared using a mixture of CaCO3, TEOS, cetyl trimethyl ammonium bromide (CTAB), triethanolamine (TEA), ethanol and H2O. Three catalysts with different CaCO3 contents, M-Ca 1 %, M-Ca 5 % and M-Ca 10 %, respectively, were prepared and characterized by N2 physisorption, XRD, FT-IR, XPS, TPD-CO2 and Pyridine-FTIR. A green and simple protocol was developed for the synthesis of 6-amino-4H-pyran scaffolds through a multicomponent coupling reaction of an aldehyde, malononitrile, and 1,3-dicarbonyl compound in different reaction solvents. This procedure was performed at room temperature (20 °C), obtaining good and excellent yields of 4H-pyran derivatives. The mesoporous materials are insoluble in polar media, which allows easy removal of the reaction products without affecting their catalytic activity. The leaching test showed an excellent stability, and Ca-MCM catalysts can be used three times without appreciable loss of their catalytic activity. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
