Cyclopentenones from a Novel [4+1]Cocyclization of Methylenecyclopropanes with Fischer Carbenechromium Complexes
作者:Armin de Meijere、Takuya Kurahashi、Yao-Ting Wu、Kathrin Meindl、Stephan Rühl
DOI:10.1055/s-2005-863746
日期:——
Fischer carbenechromium complexes react with methylenecyclopropanes and bicyclopropylidene in an unprecedented manner. All four carbon atoms of the methylenecyclopropane moiety along with carbon monoxide are incorporated with the formation of three new C-C σ-bonds to give substituted cyclopentenone derivatives in moderate (33-58% for methylenecyclopropanes) to good yields (65-72% for bicyclopropylidene)
Fischer 碳烯铬配合物以前所未有的方式与亚甲基环丙烷和双环亚丙基反应。亚甲基环丙烷部分的所有四个碳原子与一氧化碳一起形成三个新的 CC σ-键,以中等(亚甲基环丙烷为 33-58%)和良好的产率(双环亚丙基为 65-72%)得到取代的环戊烯酮衍生物.