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 bridgehead functionalization of this important bicyclic skeleton.
相比于脂族酮,二环的去质子化[5.3.1] undecenone 3给出动力学控制的条件下,更高度取代的桥头烯醇化物,而更低高度取代的烯醇化物是热力学控制的条件下形成。这些发现允许该重要的双环骨架的直接桥头官能化。