Solvent-Free condensation of methyl pyridinium and quinolinium salts with aldehydes catalyzed by DBU
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Date
2012
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Abstract
Methylpyridinium and methylquinolinium salts were condensed under solvent-free conditions with aromatic aldehydes in the presence of 1,8-diazabicyclo[5.4.]undec-7-ene (DBU) as catalyst, by grinding at room temperature. The products are dyes or useful intermediates. The DBU can be easily recycled and reused
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Keywords
Green chemistry, Knoevenagel condensation, Styryl dyes