Studies Towards Intramolecular Formal Iron-Catalyzed [4+2] Cycloaddition of Acetylenic Dienes

Fe(0) 촉매를 이용한 Acetylenic Dienes 의 분자내 [4+2] 고리화 첨가반응에 관한 연구

  • 변상용 (부산공업대학교 자연과학과)
  • Published : 19940100


The intramolecular formal iron-catalyzed [4+2] cycloaddition reaction of acetylenic dienes to produce bicyclic products has been investigated. These reactions proceeded, competing via intramolecular carbocyclization and bimolecular cycloaddition. However, the iron-catalyzed bicyclic carbocyclization of 4,4-dimethyl-3-(tert-butyldimethylsiloxy)-1-phenyl-6,8-decadien-1-yne(11) yielded exclusively bicyclic diene product(yield 78.1%). From this result, we found that the substrate containing a dimethyl substitutent at the 4,4-position helped to promote the intramolecular reaction, which is stable to the iron catalyzed conditions.



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