Mercapto-Benzimidazole and Benzoxazole

The general expression of mercapto-benzimidazole and benzoxazole is as follows  

When X and R are, respectively, —S— and H, it becomes the isomer of mercapto-benzothiazole  

When X and R are, respectively, — NH and H, it becomes mercapto-benzimidazole. When X and R are, respectively, —O— and H, it becomes mercapto- and benzoxazole. 

Preparation method of mercapto-benzimidazole varies with material and R group. The main preparation methods of mercapto-benzimidazole are as follows  

Mercapto-benzimidazole is synthesized by adopting phenylamine and CS2 as feeds. Phenylamine and CS2 are heated in naphth3ridines under the condition of heating temperature 80 °C and reaction time 46 h. The product can dissolve in water and alcohol. 

---