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Journal of Scientific and Industrial Research (JSIR) >
JSIR Vol.67 [2008] >
JSIR Vol.67(12) [December 2008] >
| Title: | Synthesis of coumarins via Pechmann condensation using inorganic ion exchangers as solid acid catalysts |
| Authors: | Joshi, Rikesh
Chudasama, Uma |
| Keywords: | Coumarin derivatives
Inorganic ion exchangers
M(IV) phosphates and tungstates
Pechman condensation
Solid acid catalysts
Tetravalent metal acid salts |
| Issue Date: | Dec-2008 |
| Publisher: | CSIR |
| Abstract: | This study involves synthesis and characterization of amorphous and crystalline M(IV) phosphates and tungstates,
which are inorganic ion exchangers of the class of tetravalent metal acid (tma) salts. Presence of protons contained in structural
hydroxyl groups indicates good potential for application in solid acid catalysis. Catalytic activity of materials has been explored
by studying Pechmann condensation as a model reaction, wherein phenols (resorcinol, pyrogallol and phloroglucinol) have
been treated with methyl acetoacetate to give coumarins, under solvent free conditions. Catalytic activity has been compared
and correlated with surface properties of materials. |
| Page(s): | 1092-1097 |
| ISSN: | 0022-4456 |
| Source: | JSIR Vol.67(12) [December 2008]
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