The 1,6‐electrocyclization of 1‐(2‐pyridyl)‐2‐azabuta‐1,3‐dienes, obtained by RhII‐catalyzed reaction of pyridotriazoles with 2H‐azirines, affords stable non‐aromatic 4H‐pyrido[1,2‐a]pyrazines despite the fact that the reaction proceeds with irreversible dearomatization of the pyridine aromatic system.
通过Rh II催化的
吡啶三唑与2 H
叠氮基的反应获得的1-(2-
吡啶基)-2-azabuta-1,3-二烯的1,6-电环化可提供稳定的非芳族4 H
吡啶基[ 1,2- a ]
吡嗪,尽管该反应会随着
吡啶芳族体系的不可逆脱芳香化而进行。