A β-tripyrane XI and cyclic β-trispyrrole XII were obtained by means of a novel two-step pyrrole synthesis from pentacarbonyl(1-amino-1-phenylmethylene)-chromium IV via an intermediate iminocarbene complex VI. VI adds alkynes VIIa–e to give the 1H-pyrroles Xa–e. Xe undergoes a rapid self-condensation with the formation of XI and XII.
通过新颖的两步
吡咯合成方法,由五羰基(1-
氨基-1-苯基亚甲基)
铬IV经亚
氨基卡宾络合物VI合成了β-三trip烷XI和环状β-三
吡咯XII。VI添加
炔烃VIIa-e生成1 H-
吡咯Xa-e。Xe经历了快速的自凝聚,形成了XI和XII。