Polar Effects in the Transition State of the Bergman Cyclization
作者:Michael Schmittel、Susanne Kiau
DOI:10.1246/cl.1995.953
日期:1995.10
From the kinetic data of enediynes 1a-c it is concluded that electron withdrawing substituents are lowering the free activation energy in the Bergman cycloaromatization by decreasing the repulsion of the in-plane π-orbitals.