首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Chloral as a formylating agent for some bridge heterosystems
Authors:V A Anisimova  N I Avdyunina  A F Pozharskii  A M Simonov  L N Talanova
Institution:(1) Rostov State University and Scientific-Research Institute of Physical and Organic Chemistry, Rostov-na-Donau
Abstract:The interaction of condensed nitrogen-containing bridge systems with chloral has been studied and the high sensitivity of the reaction to the pgr-excess of the initial heteroaromatic system has been established. It has been shown that chloral is a convenient formylating agent for systems with a moderate pgr-excess —imidazol,2-a]imidazole, 9H-imidazo1,2-a]benzimidazole, imidazo1,2-a]pyridine, imidazo1,2-a]naphtho2,3-d]imidazole. Heterocycles with a high pgr-excess (indolizine, pyrrolo1,2-a]benzimidazole) form cyanine dyes under the action of chloral. Systems with a lowered pgr-excess (1H-imidazo1,2-a]benzimidazole, imidazo1,2-a]quinoline, imidazo2,1-a]isoquinoline, imidazo1,2-a]perimidine, imidazo5,1-b]benzoxazole, imidazo1,2-a]benzothiazole, and imidazo1,2-a]pyrimidine) do not react with chloral in a neutral medium. However, in a number of cases their foraylation can be carried out in an acid medium.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 528–537, April, 1980.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号