Abstract
ABSTRACT Synthesis of calyx-imidazole/benzimidazole analog i.e., 25,26, 27-tris(ethoxycarbonylmethoxy)-28-({2′-phenylcarbamoyl} benzimidazolyloxycarbonylmethoxy) calyx-4-arene. 6a, 25,26, 27-tris(ethoxycarbonylmethoxy)-28-({2″-phenylcarbamoyl} 4′,5′-dihydroimidazolyloxycarbonylmethoxy) calyx-4-arene. 6b and 25,26,27-tris-(ethoxycarbonylmethoxy)-28-({2″-phenyl} aminocarbamoyl-4′,5′-dihydroimidazolyloxycarbonylmethoxy) calyx-4-arene. 6c have been described. Structure elucidation explains the interaction of substituted imidazole/benzimidazole (1a–c) with calyx-4-arene system. Purity of all the synthesized products was ascertained on the basis of their column chromatographic resolution on silica gel using chloroform–ethylacetate (7 : 3, v/v) as eluent and recrystallization from a mixture of chloroform–methanol (1 : 1, v/v).
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