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Synthesis 2009(9): 1431-1436
DOI: 10.1055/s-0028-1088160
DOI: 10.1055/s-0028-1088160
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Copper-Catalyzed Tandem C-N Bond Formation Reaction: Selective Synthesis of 2-(Trifluoromethyl)benzimidazoles
Further Information
Received
9 December 2008
Publication Date:
25 March 2009 (online)
Publication History
Publication Date:
25 March 2009 (online)
Abstract
A highly practical method for the synthesis of fluorinated benzimidazoles was developed by CuI/TMEDA-catalyzed cross-coupling reaction of N-(2-haloaryl)trifluoroacetimidoyl chlorides with primary amines. The present double amination process tolerates the presence of Cl, Br, or I substituent at the 2-position of the phenyl group.
Key words
copper - double amination - N-(2-haloaryl)trifluoroacet-imidoyl chlorides - primary amines - benzimidazoles
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References
CCDC-705003 contains the supplementary crystallographic data, which is available free of charge via www.ccdc.cam.ac.uk.