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5. Brønsted Acidic Ionic Liquid Catalyzed Three-Component Friedel–Crafts Reaction for the Synthesis of Unsymmetrical Triarylmethanes.

Author

Rinkam, Suttida, Senapak, Warapong, Watchasit, Sarayut, Saeeng, Rungnapha, and Sirion, Uthaiwan

Subjects
*FRIEDEL-Crafts reaction, *AROMATIC aldehydes, *BRONSTED acids, *INDOLE compounds, *IONIC liquids
Abstract

A convenient and practical method for the synthesis of unsymmetrical triarylmethanes was demonstrated through a one-pot three-component double Friedel–Crafts reaction of various aliphatic, aromatic, or heteroaromatic aldehydes with N , N -dialkylanilines and indoles by using a Brønsted acidic ionic liquid as the catalyst. This method was successfully applied under metal- and solvent-free conditions at 80 °C, affording the corresponding unsymmetrical triarylmethane products in moderate to high yields from a broad range of substrates. In addition, the mechanism of this reaction was studied by quantitative NMR analysis. [ABSTRACT FROM AUTHOR]

Published
2022
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