14805-54-0Relevant articles and documents
Process for the synthesis 1H, 1 'H H (2, 2' - bisbenzimidazole) -5, 5' - diamine
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Paragraph 0021-0024; 0029-0032; 0037-0040, (2019/08/07)
The invention discloses a method for synthesizing 1H, 1'H-(2,2'-bis-benzimidazole)-5,5'-diamine. The method comprises the steps of obtaining N,N'-bis(2,4-dinitrophenyl)oxamide through condensation reaction between oxalyl chloride and 2,4-dinitraniline, obtaining N,N'-bis(2,4-diaminophenyl)oxamide through catalytic hydrogenation of the N,N'-bis(2,4-dinitrophenyl)oxamide and obtaining the 1H,1'H-(2,2'-bis-benzimidazole)-5,5'-diamine through dehydration cyclization of the N,N'-bis(2,4-diaminophenyl)oxamide. The method disclosed by the invention has a shorter synthesizing path, high technological safety, convenience to operate, lower production cost, higher reaction yield and especially smaller environmental pollution, so that the method is suitable for industrial production; in addition, raw materials of the method are cheap and easy to obtain.