SYNTHESIS OF 25,26,27-<i>TRIS</i>(ETHOXYCARBONYLMETHOXY)- 28-(SUBSTITUTED OXY-CARBONYLMETHOXY) CALIX-4-ARENE: FIRST EXAMPLE OF CALIX-IMIDAZOLE/BENZIMIDAZOLE ANALOG
作者:Pratibha Sharma、Ashok Kumar、Anupam Mandloi
DOI:10.1081/scc-120006023
日期:2002.1
Synthesis of calyx-imidazole/benzimidazole analog i.e., 25,26, 27-tris(ethoxycarbonylmethoxy)-28-(2'-phenylcarbamoyl} benzimidazolyloxycarbonylmethoxy) calyx-4-arene. 6(a), 25,26, 27-tris(ethoxycarbonylmethoxy)-28-(2"-phenylcarbamoyl} 4',5'-dihydroimidazolyloxycarbonylmethoxy) calyx-4-arene. 6(b) and 25,26,27-tris-(ethoxycarbonylmethoxy)-28-(2"-phenyl} aminocarbamoyl-4',5'-dihydroimidazolyloxycarbonylmethoxy) calyx-4-arene. 6(c) have been described. Structure elucidation explains the interaction of substituted imidazole/benzimidazole (1(a-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).