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Rapid one pot synthesis of xanthene derivatives by an efficient and reusable nano-ZnAl2O4 – An insight into a new process
Mandlimath T.R, Umamahesh B,
Published in Elsevier BV
Volume: 391
Pages: 198 - 207
Nano-ZnAl2O4 was synthesized by blending metal-citrate complex-acrylamide polymer using the precursor method. Powder X-ray diffraction analysis of the catalyst affirmed that the spinel oxide was phase pure. Elemental analysis was confirmed by Energy Dispersive X-ray analysis. Transmission Electron Microscopic (TEM) analysis and Scherrer's formula revealed that the particles were found to be in the order of 20 nm in size. Thermal stability of the catalyst was analyzed by thermogravimetric and differential thermal analysis (TG-DTA). Total acidity of the nano-ZnAl 2O4 evaluated by NH3-TPD was 8.8 mmol NH 3/g. Diversity in the synthesis of xanthene derivatives was investigated using nanozinc aluminate as a catalyst. Nanoform of the catalyst showed better activity than the bulk form due to its large surface area 50 m2/g. The 2,2′-arylmethylene bis (3-hydroxy-2-cyclohexene-1- one), 2,2′-arylmethylene bis (3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) and 1-Oxo-hexahydroxanthenes were synthesized rapidly using ZnAl 2O4 and the catalyst was successfully recycled without any loss of activity. © 2014 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Molecular Catalysis A: Chemical
PublisherData powered by TypesetElsevier BV
Open Access0