Title of article :
Cyclopentenones from a Novel [4+1]Cocyclization of Methylenecyclopropanes with Fischer Carbenechromium Complexes
Author/Authors :
Kurahashi، Takuya نويسنده , , Meijere، Armin de نويسنده , , Wu، Yao-Ting نويسنده , , Meindl، Kathrin نويسنده , , Ruhl، Stephan نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
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 (sigma)-bonds to give substituted cyclopentenone derivatives in moderate (33-58% for methylenecyclopropanes) to good yields (65-72% for bicyclopropylidene).
Keywords :
cycloaddition , chromium , Transition metals