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Synthesis of coumarins via Pechmann condensation using inorganic ion exchangers as solid acid catalysts

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Title Synthesis of coumarins via Pechmann condensation using inorganic ion exchangers as solid acid catalysts
 
Creator Joshi, Rikesh
Chudasama, Uma
 
Subject Coumarin derivatives
Inorganic ion exchangers
M(IV) phosphates and tungstates
Pechman condensation
Solid acid catalysts
Tetravalent metal acid salts
 
Description 1092-1097
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.
 
Date 2008-12-05T06:02:49Z
2008-12-05T06:02:49Z
2008-12
 
Type Article
 
Identifier 0022-4456
http://hdl.handle.net/123456789/2523
 
Language en_US
 
Publisher CSIR
 
Source JSIR Vol.67(12) [December 2008]