A Task-Specific Ionic-Liquid-Mediated Solvent-Free Protocol for Direct Access to Dimethyl Acetal Protected Benzimidazole 2-Carboxaldehydes
Keyword(s):
Scale Up
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AbstractA robust and straightforward protocol has been developed for the synthesis of a diverse array of dimethyl acetal protected benzimidazole-2-carboxaldehydes by reacting various 2-amino aniline derivatives with methyl 4,4-dimethoxy-3-oxobutanoate using the task-specific imidazolium ionic liquid (HBIm·TFA) as a promoter for N-C/C-N annulation processes. The present protocol offers several advantages over existing protocols, such as single-step process, short reaction times, very mild reaction conditions, high yields, ease of purification, recovery and reusability of the catalyst, and scale-up of the reaction.
2008 ◽
Vol 2008
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pp. 1-4
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Keyword(s):
2017 ◽
Vol 13
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pp. 694-702
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2009 ◽
Vol 2009
(8)
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pp. 473-477
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