Chiral biomimetic NADH models in the benzo[b]-1,6-naphthyridine series. A novel class of stable, reactive and highly enantioselective NADH mimics
作者:J Vasse
DOI:10.1016/s0040-4020(03)00706-3
日期:2003.6.23
The preparation of a new class of tricyclic models 1 based on a Friedländer reaction between chiral piperidine-2,4-diones 2 and azomethine 3 is reported. Alkylation of the lactam allowed to install various pendant arms on the chiral cyclic inducer. The so-obtained mimics 1a,d,f,g,h,k were involved in the reduction of methyl benzoylformate to furnish methyl mandelate in 4–87% ee (R). The presence of
据报道,基于手性哌啶-2,4-二酮2和偶氮甲碱3之间的Friedländer反应,制备了新型的三环模型1。内酰胺的烷基化使得可以在手性环状诱导剂上安装各种侧基臂。如此获得的模拟物1a,d,f,g,h,k参与了苯甲酸甲酰甲酯的还原,以得到4–87%ee(R)的扁桃酸甲酯。事实证明,存在协同作用的悬臂对于获得对映体诱导的最佳结果是必不可少的。用1d模拟物不对称还原2-苯甲酰基吡啶,f,g以30–84%ee(R)生成α-苯基-2-吡啶甲醇。