Hydrogenation on palladium-containing granulated catalysts 3. Synthesis of aminobenzimidazoles by catalytic hydrogenation of dinitroanilines
作者:V. V. Elkin、L. N. Tolkacheva、N. B. Chernysheva、I. B. Karmanova、L. D. Konyushkin、V. V. Semenov
DOI:10.1007/s11172-007-0184-z
日期:2007.6
Efficient hydrogenation of o-aminonitrobenzenes on palladium-containing granulated carbon catalysts in carboxylic acid solutions was accompanied by cyclization into aminobenzimidazoles. A simple hydrogenation reactor with a fixed gauze holding a reusable granulated catalyst was designed. Acylated and sulfonylated 4(7)-aminobenzimidazoles were obtained. In terms of electronic and geometrical parameters, they are close analogs of biologically active imidazo[1,5,4-e,f ][1,5]benzodiazepines.
在羧酸溶液中,含钯颗粒碳催化剂上邻氨基硝基苯的高效氢化伴随着环化反应生成氨基苯并咪唑。设计了一种带有固定纱网以容纳可重复使用颗粒催化剂的简单氢化反应器。得到了酰化和磺酰化的4(7)-氨基苯并咪唑。就电子和几何参数而言,它们与生物活性咪唑并[1,5,4-e,f][1,5]苯并二氮杂卓类化合物非常相似。