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Microwave Irradiation Synthesis of 2-Substituted Benzimidazoles Using PPA as a Catalyst under Solvent-Free Conditions.

✍ Scribed by Jun Lu; Bingqin Yang; Yinjuan Bai

Publisher
John Wiley and Sons
Year
2003
Weight
93 KB
Volume
34
Category
Article
ISSN
0931-7597

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✦ Synopsis

Abstract

For Abstract see ChemInform Abstract in Full Text.

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## Abstract Silica‐supported polyphosphoric acid (PPA‐SiO~2~) catalyzed efficiently the reaction of anthranilamide with aryl aldehydes or ketones under solvent‐free conditions to afford the corresponding 1,2,3,4‐tetrahydro‐4‐quinazolinone derivatives. This work consistently has the advantages of ex