Synthesis of derivatives of a new heterocyclic system pyrazolo[3,4-b]pyrido[1′,2′: 1,2]imidazo[4,5-d]pyridine
作者:E. S. Komarova、V. A. Makarov、L. M. Alekseeva、G. V. Avramenko、V. G. Granik
DOI:10.1007/s11172-006-0322-z
日期:2006.4
Abstract1-[4-Aminoarylpyrazolo[3,4-b]pyridin-5-yl]pyridinium chlorides undergo cyclization under reflux in tert-butanol in the presence of an excess of potassium tert-butoxide to form tetracyclic derivatives of pyrazolo[3,4-b]pyrido[1′,2′:1,2]imidazo[4,5-d]pyridine. The reaction scheme of the processes is proposed. The structures of the reaction products were confirmed by physicochemical methods.
摘要1-[4-氨基芳基吡唑并[3,4-b]吡啶-5-基]吡啶鎓在过量叔丁醇钾存在下在叔丁醇中回流环化,形成吡唑并[3,4]的四环衍生物-b]吡啶并[1',2':1,2]咪唑并[4,5-d]吡啶。提出了这些过程的反应方案。反应产物的结构通过物理化学方法确定。