Iron Tricarbonyl Stabilized Pentadienyl Cation as Initiator for Cascade Polycyclizations: A Diastereoselective Entry into Octahydrophenanthrenes
作者:Anthony J. Pearson、Victor P. Ghidu
DOI:10.1021/jo048557a
日期:2004.12.1
A new example is provided of completely diastereoselectivepolycyclization, affording the octahydrophenanthrene framework. Generation of an iron tricarbonyl stabilized pentadienyl carbocation is the triggering event of the cascade reaction. The carbocation is generated by anchimerically assisted regiospecific protonation of a double bond adjacent to the iron tricarbonyl diene moiety. Tetrafluoroboric