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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 4
BKCSDE 30(4)
April 20, 2009 

Alum Catalyzed Simple and Efficient Synthesis of Bis(indolyl)methanes by Ultrasound Approach
Swapnil S Sonar, Sandip A Sadaphal, Amol H Kategaonkar, Rajkumar U Pokalwar, Bapurao B Shingate, Murlidhar S Shingare*
Bis(indolyl)methanes, Alum, 1H-indole, Aldehydes/ketones, Ultrasound irradiation
Alum (KAl(SO4)2?12H2O) is an inexpensive, efficient, non?toxic and mild catalyst for the synthesis of
bis(indolyl)methanes by the reaction of 1H-indole with various aldehydes/ketones under the influence of ultrasound
irradiation in solvent?free condition. The remarkable advantages of this method are the simple experimental
procedures, shorter reaction times, high yields of product and green aspects by avoiding toxic catalysts and solvents.
825 - 828
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