Journal
SYNLETT
Volume -, Issue 8, Pages 1320-1322Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2007-977453
Keywords
catalysis; condensation; indoles; ionic liquids; supported catalysis
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A new organocatalytic procedure for the synthesis of bis(indolyl)methanes with acidic ionic liquid immobilized on silica gel (ILIS-SO2Cl) has been developed. The reaction condition is applicable to a variety of aryl and aliphatic aldehydes and indoles. The mild nature of the reaction conditions showed that the acetoxy or TBDMS group in the aldehyde was maintained intact. The catalyst was reused four times in 93% average yield.
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