Cyclization under Michael Reaction Conditions; II Synthesis of 2-Azabicyclo[2.2.2]octa-2,5-diene Derivatives from Alkylidenemalononitriles and Formation of Pyridine Derivatives
作者:Minoru Igarashi、Yoshiharu Nakano、Kazuhiro Takezawa、Takeshi Watanabe、Shoichi Sato
DOI:10.1055/s-1987-27850
日期:——
2-Azabicyclo[2.2.2]octa-2,5-diene derivatives 2 are obtained from alkylidenemalononitriles using sodium methoxide. Several of these bicyclo compounds smoothly undergo retro-Diels-Alder with the loss of the hydrocarbon moiety to give the corresponding pyridine derivatives 3 when heated in xylene or acetic acid.
使用甲醇钠从亚烷基丙二腈获得2-氮杂双环[2.2.2]八-2,5-二烯衍生物2。当在二甲苯或乙酸中加热时,其中一些双环化合物顺利地进行逆狄尔斯-阿尔德反应,失去烃部分,得到相应的吡啶衍生物3。