Synthesis and Screening of C<sup>1</sup>-Substituted Tetrahydroisoquinoline Derivatives for Asymmetric Transfer Hydrogenation Reactions
作者:Sai Kumar Chakka、Pher G. Andersson、Glenn E. M. Maguire、Hendrik G. Kruger、Thavendran Govender
DOI:10.1002/ejoc.200901159
日期:2010.2
Tetrahydroisoquinoline (TIQ) derivatives exhibit good biological activity. However, utilization of TIQ compounds in asymmetric catalysis is limited. This paper presents a series of TIQ derivatives in asymmetric transfer hydrogenation (ATH) reactions. Chiral TIQ amino alcohol ligands were synthesized and screened for the ATH reaction of aromatic ketones. The effect of a cis- and trans-phenyl substitution
四氢异喹啉 (TIQ) 衍生物表现出良好的生物活性。然而,TIQ 化合物在不对称催化中的应用是有限的。本文介绍了一系列用于不对称转移氢化 (ATH) 反应的 TIQ 衍生物。合成了手性 TIQ 氨基醇配体并筛选了芳香酮的 ATH 反应。通过实验和计算研究了 C-1 位置上的顺式和反式苯基取代对配体骨架的影响。结果表明,在室温下用 Ru 复合物获得的 TIQ 支架上的反式取向产生更高的周转率,选择性为 94% ee。顺式异构体导致没有选择性的高周转率。反式异构体在较低温度下产生 99% ee。此外,