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- Title
Synthesis of mesoporous Ca-MCM catalysts and their use in suitable multicomponent synthesis of polyfunctionalized pyrans.
- Authors
Nope, Eliana; Martínez, José; Rojas, Hugo; Sathicq, Ángel; Romanelli, Gustavo
- Abstract
Mesoporous Ca-MCM catalysts were prepared using a mixture of CaCO, TEOS, cetyl trimethyl ammonium bromide (CTAB), triethanolamine (TEA), ethanol and HO. Three catalysts with different CaCO contents, M-Ca 1 %, M-Ca 5 % and M-Ca 10 %, respectively, were prepared and characterized by N physisorption, XRD, FT-IR, XPS, TPD-CO and Pyridine-FTIR. A green and simple protocol was developed for the synthesis of 6-amino-4 H-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 4 H-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.
- Subjects
MESOPOROUS materials; PYRIDINE; CALCIUM; CETYLTRIMETHYLAMMONIUM bromide; CHEMICAL synthesis; PYRAN synthesis
- Publication
Research on Chemical Intermediates, 2017, Vol 43, Issue 4, p2103
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-016-2749-7