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Synfacts 2011(8): 0922-0922
DOI: 10.1055/s-0030-1260709
DOI: 10.1055/s-0030-1260709
Polymer-Supported Synthesis
© Georg Thieme Verlag
Stuttgart ˙ New York
Ionic Liquid Supported Synthesis of Benzimidazolones
S. Thummanagoti, G. S. Yellol, C.-M. Sun*
National Chiao Tung University, Taiwan, P. R. Of China
Further Information
Publication History
Publication Date:
20 July 2011 (online)
Significance
Ionic liquid supported benzimidazole-linked pyrrolo-, pyrido- (72-85%) and isoindolo-benzimidazolones (79-82%) were prepared under microwave irradiation conditions. The double dehydrative cyclocondensation of the immobilized o-phenylenediamines 5 and keto acids took place successively in one step under microwave conditions to form pyrrolo-, pyrido-, and isoindolo-benzimidazolones 6-8 by way of the corresponding N,N′-alkylidene intermediates.