由酰胺2和13衍生的横向锂化中间体3·1和14·1的(-)-sparteine介导的锂化-取代反应可以获得高度对映体富集的取代产物。产物的任一对映体都可以通过高对映体富集获得using (−)-sparteine as the ligand by appropriate choice of the protocol. 两个序列中的对映体决定步骤发生在去质子化之后。3·1 序列中的对映体富集来自动态动力学分辨率,而 14·1 序列中的对映体富集来自动态热力学分辨率。
Control of the Enantiochemistry of Electrophilic Substitutions of <i>N</i>-Pivaloyl-α-lithio-<i>o</i>-ethylaniline: Stereoinformation Transfer Based on the Method of Organolithium Formation
作者:Amit Basu、Peter Beak
DOI:10.1021/ja951895w
日期:1996.1.1
Two Different Pathways of Stereoinformation Transfer: Asymmetric Substitutions in the (−)-Sparteine Mediated Reactions of Laterally Lithiated <i>N,N</i><i>-</i>Diisopropyl-<i>o</i>-ethylbenzamide and <i>N</i>-Pivaloyl-<i>o</i>-ethylaniline
作者:S. Thayumanavan、Amit Basu、Peter Beak
DOI:10.1021/ja970930r
日期:1997.9.1
Highly enantioenriched substitution products can be obtained by the (−)-sparteine mediated lithiation−substitution reactions of the laterally lithiated intermediates 3·1 and 14·1 derived from the amides 2 and 13. Either enantiomer of the products can be obtained with high enantioenrichment using (−)-sparteine as the ligand by appropriate choice of the protocol. The enantiodetermining step in both sequences
由酰胺2和13衍生的横向锂化中间体3·1和14·1的(-)-sparteine介导的锂化-取代反应可以获得高度对映体富集的取代产物。产物的任一对映体都可以通过高对映体富集获得using (−)-sparteine as the ligand by appropriate choice of the protocol. 两个序列中的对映体决定步骤发生在去质子化之后。3·1 序列中的对映体富集来自动态动力学分辨率,而 14·1 序列中的对映体富集来自动态热力学分辨率。