Reversal of regiospecificity in the kinetic vs. thermodynamic enolization of bicyclic ketones. Direct bridgehead functionalization of the bicyclo[5.3.1]undecane ring system
作者:Kenneth J. Shea、Steven T. Sakata
DOI:10.1016/s0040-4039(00)74233-x
日期:1992.7
deprotonation of bicyclo [5.3.1] undecenone 3 gives the more highly substituted bridgehead enolate under conditions of kinetic control while the less highly substituted enolate is formed under conditions of thermodynamic control. These findings allow for the direct bridgeheadfunctionalization of this important bicyclic skeleton.
Bridged to fused ring interchange. New methodology for the construction of fused cycloheptanes and cyclooctanes
作者:S.L. Gwaltney、S.T. Sakata、K.J. Shea
DOI:10.1016/0040-4039(95)01488-4
日期:1995.10
The type two intramolecular Diels-Alder cycloaddition coupled with a bridged to fused interchange provides an efficient method for synthesis of fused 5,7 and 5,8 ring systems.