piperazine at reflux for 4 hours. Then, two equivalents of the appropriate halogen‐containing reagents were added and the reaction was heated at reflux for further 3 hours. The bis(thieno[2,3‐b ]pyridines) were taken as a key intermediates to new bis(4‐oxopyrido[3′,2′:4,5]thieno[3,2‐d ]pyrimidines). The above derivatives were reacted with the appropriate hydrazonyl chloride derivatives in dioxane in the
在这项研究中,我们讨论了双(
氰基乙
酰胺)作为通用的前体在
哌嗪介导的宽范围的双(
噻吩并[2,3- b ]
吡啶)衍
生物合成中的用途,这些衍
生物通过
硫醚与
脂肪族间隔基连接。拟议的
串联方案涉及双(
氰基乙
酰胺)与两当量的适当
肉桂腈在
二恶烷中,六当量
哌嗪的存在下回流反应4小时。然后,加入两当量的适当的含卤素试剂,并将反应加热回流三小时。bis(thieno [2,3- b ]
吡啶)被用作新bis(4-oxopyrido [3',2':4,5] thieno [3,2- d ]的关键
中间体]
嘧啶)。在
三乙胺存在下,使上述衍
生物与适当的酰
氯酰
氯在
二恶烷中反应,得到具有相关的稠合
吡啶并
噻吩并
嘧啶部分的相应双([[1,
2,4]三唑)。通过IR,NMR光谱数据以及元素分析来阐明新结构。