A convenient synthesis of benzannelated diazacycloalkanes by reductive cleavage of 1,2-polymethylenebenzimidazoles
作者:Tatyana Shvidenko、Kostiantyn Nazarenko、Konstantin Shvidenko、Aleksandr Kostyuk
DOI:10.1016/j.tetlet.2013.11.025
日期:2014.1
A facile procedure for the synthesis of benzannelated diazacycloalkanes 3 is elaborated on the basis of reductive cleavage of 1,2-polymethylenebenzimidazoles 2 with DIBAL-H. The reduction of the corresponding salts prepared by treatment of 1,2-polymethylenebenzimidazoles 2 with methyl iodide proceeded differently affording exclusively o-phenylenediamines 10. The limitations and scope of the method
在1,2-聚亚甲基苯并咪唑2与DIBAL-H的还原裂解的基础上,详细阐述了合成苯甲酰化的重氮环烷烃3的简便方法。通过用碘甲烷处理1,2-聚亚甲基苯并咪唑2制备的相应盐的还原进行不同,仅得到邻苯二胺10。确定了该方法的局限性和范围,并提出了一种尝试性的机制。