Multiple Absolute Stereocontrol in Cascade Lactone Formation via Dynamic Kinetic Resolution Driven by the Asymmetric Transfer Hydrogenation of Keto Acids with Oxo-Tethered Ruthenium Catalysts
作者:Taichiro Touge、Kazuhiko Sakaguchi、Nao Tamaki、Hideki Nara、Tohru Yokozawa、Kazuhiko Matsumura、Yoshihito Kayaki
DOI:10.1021/jacs.9b07297
日期:2019.10.16
straightforward asymmetric construction of chiral fused γ- and δ-lactones containing multiple contiguous stereocenters was successfully developed by either (1) the dynamic kinetic resolution-asymmetric transfer hydrogenation (DKR-ATH) reaction using oxo-tethered Ru(II) complexes followed by syn-selective lactonization or (2) the tandem DKR-ATH/lactonization in combination with asymmetric hydrogenation
包含多个连续立体中心的手性稠合 γ- 和 δ-内酯的直接不对称结构通过以下任一方法成功开发:(1)使用氧系连接的 Ru(II)配合物的动态动力学拆分 - 不对称转移氢化(DKR-ATH)反应,然后是顺选择性内酯化或 (2) 串联 DKR-ATH/内酯化与 Ru-手性二膦配合物催化的不对称氢化相结合。该权宜之计适用于天然葡萄酒内酯和生物活性苯并稠合内酯的对映选择性合成,具有前所未有的非对映选择性和对映选择性。