tandem synthesis of 2,3,4,5-tetrasubstituted pyrroles from aromatic aldehydes using diethylene glycol-bis(3-methylimidazolium) dihydroxide as an efficient catalyst
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abstract
a sequential process strategy was introduced for the synthesis of 2,3,4,5-tetrasubstituted pyrroles by the formation of benzoin from the corresponding aromatic aldehyde and followed by condensation reaction with 1,3-dicarbonyl compounds and ammonium acetate in the presence of diethylene glycol-bis(3-methylimidazolium) dihydroxide as catalyst in refluxing ethanol. the recycled catalyst could be reused four times without appreciable loss in the catalytic activity.
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Journal title:
organic chemistry researchPublisher: iranian chemical society
ISSN
volume 1
issue 2 2016
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