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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 4
BKCSDE 33(4)
April 20, 2012 

 
Title
A DABCO Derived Ionic Liquid Based on Tetrafluoroborate Anion: Preparation, Characterization and Evaluation of its Catalytic Activity in the Synthesis of 14-Aryl-14H-dibenzo[a, j]xanthenes
Author
Atefeh Zare-Bidaki, Abolghasem Davoodnia*
Keywords
Ionic liquid, DABCO, Tetrafluoroborate anion, 14-Aryl-14H-dibenzo[a,j]xanthenes
Abstract
A room-temperature ionic liquid (RTIL) derived from 1,4-diazabicyclo[2.2.2]octane (DABCO) consisting of tetrafluoroborate anion, 1-butyl-4-(4-sulfonylbutyl)-1,4-diazoniabicyclo[2.2.2]octane hydrogen sulfate tetrafluoroborate ([C4DABCOC4SO3H][BF4][HSO4]) was synthesized and catalytically evaluated in the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes by cyclocondensation reaction of β-naphthol and aryl aldehydes. This novel RTIL with an acidic SO3H group showed high catalytic activity with good to excellent yields of the desired products in short reaction times. Moreover, the catalyst could be recovered and reused at least three times with only slight reduction in its catalytic activity.
Page
1154 - 1158
Full Text
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