Dynamic Processes in the Copper-Catalyzed Substitution of Chiral Allylic Acetates Leading to Loss of Chiral Information
作者:Jakob Norinder、Jan-E. Bäckvall
DOI:10.1002/chem.200601684
日期:2007.5.7
formation. Equilibration of the reaction intermediates is of importance for a possible development of a dynamic kinetic asymmetric transformation (DYKAT) process, in which a chiral catalyst is used to produce an optically active product from a racemic substrate, by means of a dynamic equilibrium of the diastereomeric reaction intermediates.
研究了用格氏试剂对铜催化的对映体纯的仲烯丙基酯的α-取代,目的是寻找产生外消旋产物的条件。观察到手性转移的程度强烈依赖于温度。手性信息的丢失与产物形成之前Cu(III)(烯丙基)中间体的平衡相一致。反应中间体的平衡对于动态动力学不对称转化(DYKAT)方法的可能发展非常重要,在该方法中,通过非对映异构体的动态平衡,使用手性催化剂由外消旋底物生产旋光产物。反应中间体。