Facile synthesis of alkoxyphthalimide derivatized benzimidazole assembled pyrazoles, pyrimidines and isoxazoles, via common intermediate chalcone

A Bapna, S Ojha, GL Talesara

Index: Bapna, Archita; Ojha, Swati; Talesara Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2008 , vol. 47, # 7 p. 1096 - 1107

Full Text: HTML

Citation Number: 9

Abstract

Abstract: In the present investigation, synthesis of 2-(3-aryl-2-phenyl-3, 4-dihydropyrazol-5- yl)-1-N-alkoxyphthalimidobenzimidazole 9a-h, 4-(1-N-alkoxyphthalimidobenzimidazol-2-yl)- 6-arylpyrimidin-2-amine 10a-h and 2-(5-aryl-4, 5-dihydroisoxazol-3-yl)-1-N- alkoxyphthalimidobenzimidazole 11a-h are described. Mild dichromate oxidation of 1- benzimidazol-2-yl-ethanol 1 gives 1-benzimidazol-2-yl-ethanone 2 which on Clasien ...