22704-51-4Relevant articles and documents
Method for catalytic synthesis of benzimidazole derivative from N,N-dimethylthiocarbamoyl chloride derivative under microwave radiation
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Paragraph 0025; 0028, (2018/08/04)
The invention discloses a method for catalytic synthesis of benzimidazole derivative under microwave radiation. The method comprises steps as follows: the catalytic quantities of a catalyst cuprous iodide, an aided catalyst sodium hydroxide, o-phenylenediamine, a derivative of o-phenylenediamine and an N,N-dimethylthiocarbamoyl chloride derivative are added to a reaction vessel and taken as raw materials, a pyridine solvent is added, all materials are placed in a microwave reaction instrument and subjected to a reaction at certain temperature and power, after a period of time, reduced-pressureconcentration is performed, and a product is subjected to column chromatography purification. The efficient method which adopts the novel raw materials and is simple and convenient to operate and used for preparing the benzimidazole derivative is provided. Compared with the prior art, the method has the advantages of being simple to operate, high in yield, safe, low in cost and environmentally friendly, reaction speed is obviously higher than that of conventional heating, and reaction conditions are mild.