has been investigated. Chlorination of 1-(5-nitropyridin-2-yl)guanidine by N-chlorosuccinimide in methanol followed by addition of aqueous potassium carbonate gave rise to cyclization and afforded 6-nitro-[1,2,4]triazolo[1,5-a]pyridin-2-amine in one-pot. In the course of studying the scope and limitation of the reaction, it was found that some of the examined 1-(pyridin-2-yl)guanidine derivatives gave
已经研究了使用N-
氯代琥珀
酰亚胺和
碳酸钾水溶液对1-(
吡啶-2-基)
胍衍
生物的氧化环化作用。N-
氯琥珀
酰亚胺在
甲醇中
氯化1-(5-
硝基吡啶-2-基)
胍,然后加入
碳酸钾水溶液进行环化,得到6-硝基-[1,2,4]三唑并[1,5-]一锅中有]
吡啶-2-胺。在研究反应的范围和限制的过程中,发现某些检查过的1-(
吡啶-2-基)
胍衍
生物不仅给出了所需的[1,2,4]三唑[1,5-]。a ]
吡啶-2-胺,但也有意想不到的[1,2,4]三唑[4,3- a ]] pyridin-3-amine产品。作为这种氧化环化的合理反应机理,提出了重氮形成和氮形成。