申请人:United States of America as represented by the Secretary of the Air Force
公开号:US05081256A1
公开(公告)日:1992-01-14
2-Benzimidazole terephthalic acid, 4,4'-dicarboxy-2,2'-bisbenzimidazole benyl and 4,4"-dicarboxy-2'-phenyl-3'-[2-(4-phenylbenzthiazole)]-6'-[2-(3-phenylbenz imidazole]-p-terphenyl are provided. Also provided are methods for preparing these dicarboxylic acids. 2-benzimidazole terephthalic acid is prepared by reacting trimellitic anhydride with o-phenylenediamine in a suitable solvent. 4,4'-dicarboxy-2,2'-bisbenzimidazole biphenyl is prepared by diazotizing 2-amino-5-bromobenzoic acid to prepare 4,4'-dibromodiphenic acid, reacting the 4,4'-dibromodiphenic acid with o-phenylenediamine in trimethylsilyl polyphosphate solution to prepare 4,4'-dibromo-2,2'-bisbenzimidazolyl biphenyl, reacting the 4,4'-dibromo-2,2'-bisbenzimidazolyl biphenyl with cuprous cyanide to prepare the corresponding dicyano compound, and hydrolyzing the dicyano compound. 4,4"-Dicarboxy-2'-phenyl-3'-[2-(4-phenylbenzthiazole)]-6'-[2-(3-phenylbenz imidazole)]-p-terphenyl is prepared by reacting a 4-benzazole benzil with 1,3-bis(p-bromophenyl)-2-propanone to prepare 2,5-bis(p-bromophenyl)-3-phenyl-4-(2-phenylbenzazole) cyclopentadienone, reacting the cyclopentadienone with 2-(3-ethynylphenyl) benzimidazole to prepare the corresponding dibromo terphenyl compound, reacting the dibromo terphenyl compound with cuprous cyanide to prepare the corresponding dicyano terphenyl compound, and hydrolyzing the dicyano compound.
提供2-苯并咪唑对苯二甲酸、4,4'-二羧基-2,2'-双苯并咪唑苯基和4,4"-二羧基-2'-苯基-3'-[2-(4-苯基苯并噻唑)]-6'-[2-(3-苯基苯并咪唑]-对联苯。还提供了制备这些二羧酸的方法。通过将苯三甲酸酐与邻苯二胺在适当溶剂中反应制备2-苯并咪唑对苯二甲酸。通过将2-氨基-5-溴苯甲酸重氮化制备4,4'-二溴联苯酸,将4,4'-二溴联苯酸与邻苯二胺在三甲基硅多磷酸酯溶液中反应制备4,4'-二溴-2,2'-双苯并咪唑基联苯,将4,4'-二溴-2,2'-双苯并咪唑基联苯与氰化亚铜反应制备相应的二氰化合物,然后水解二氰化合物制备4,4'-二羧基-2,2'-双苯并咪唑联苯。通过将4-苯并唑基苯甲酮与1,3-双(对溴苯基)-2-丙酮反应制备2,5-双(对溴苯基)-3-苯基-4-(2-苯基苯并唑基)环戊二烯酮,将环戊二烯酮与2-(3-乙炔基苯基)苯并咪唑反应制备相应的二溴联苯化合物,将二溴联苯化合物与氰化亚铜反应制备相应的二氰基联苯化合物,然后水解二氰化合物制备4,4"-二羧基-2'-苯基-3'-[2-(4-苯基苯并噻唑)]-6'-[2-(3-苯基苯并咪唑)]-对联苯。