cyclobutanecarboxamide with bis(trifluoroacetoxy)iodobenzene, PhI(OCOCF3)2, resulted in the formation of 1‐pyrroline via Hofmann rearrangement of the former followed by in situ ring expansion reaction of the cyclobutylamine intermediate. Further elaboration of this methodology to the synthesis of 2,3‐dihydro‐1H‐pyrrolo[2,1‐a]isoquinolinium salts has also been described.
用双(三
氟乙酰氧基)
碘苯PhI(OCOCF 3)2处理
环丁烷甲酰胺,导致前者的霍夫曼重排形成1-
吡咯啉,然后
环丁胺中间体进行原位环扩环反应。还描述了该方法对2,3-二氢-1 H-
吡咯并[2,1- a ]
异喹啉鎓盐的合成的进一步阐述。