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在酸催化下 ,邻苯二胺和取代苯基异硫氰酸酯在 Hg O或 Hg Cl2 存在下 ,经缩合 -脱硫环合得 2 - (取代苯氨基 )苯并咪唑。该方法具有条件温和、反应迅速、收率高等特点。利用波谱分析和元素分析对新化合物 5 a进行了结构表征
Under acid catalysis, ortho-phenylenediamine and substituted phenyl isothiocyanates are cyclodehydrogenated to form 2 - (substituted anilino) benzimidazoles by condensation-desulfurization in the presence of Hg O or Hg Cl2. The method has the advantages of mild conditions, rapid reaction and high yield. The new compound 5a was characterized by spectral analysis and elemental analysis