Asymmetric Syntheses of 3,4-Substituted Tetrahydroquinoline Derivatives by (-)-Sparteine-Mediated Dynamic Thermodynamic Resolution of 2-(α-Lithiobenzyl)-<i>N</i>-pivaloylaniline
作者:Yong Park、Yongtae Kim、Eun-kyoung Shin、Peter Beak
DOI:10.1055/s-2006-950299
日期:2006.11
(-)-Sparteine-mediated dynamic thermodynamic resolution of 2-(α-lithiobenzyl)-N-pivaloylaniline was investigated. A temperature- and concentration-controlled epimerization-substitution sequence provides a simple protocol for the preparation of a highly enantioenriched benzyl-substituted N-pivaloylaniline product (up to 98:2 er). Also, application of this simple methodology to asymmetric syntheses of 1,3,4- and 3,4-substituted tetrahydroquinoline derivatives is demonstrated.
研究了 (-)-Sparteine 介导的 2-(δ-硫代苄基)-N-新戊酰基苯胺的动态热力学解析。温度和浓度受控的外嵌合-取代序列为制备高对映体富集的苄基取代 N-新戊酰基苯胺产品(高达 98:2 er)提供了一个简单的方案。此外,还展示了这一简单方法在 1,3,4- 和 3,4- 取代的四氢喹啉衍生物的不对称合成中的应用。