synthesis of chiral tetrahydroquinoline derivatives with excellent enantioselectivities and high yields has been developed through one‐pot cascade biomimetic reduction. The detailed reaction pathway includes the acid‐catalyzed and ruthenium‐catalyzedformation of aromatic quinoline intermediates and biomimetic asymmetric reduction.
Asymmetric Reduction of Quinolines: A Competition between Enantioselective Transfer Hydrogenation and Racemic Borane Catalysis
作者:Bochao Gao、Zaiqi Han、Wei Meng、Xiangqing Feng、Haifeng Du
DOI:10.1021/acs.joc.2c02905
日期:2023.3.3
A chiral phosphoric acid catalyzed asymmetrictransferhydrogenation of quinolines with regenerable dihydrophenanthridine derived by a borane-catalyzed hydrogenation of phenanthridine under H2 has been successfully realized. Despite the competition of a racemic hydrogenation pathway, a variety of tetrahydroquinolines were furnished in high yields with up to 91% ee.
已成功实现了由硼烷催化氢化菲啶在H 2 下衍生的手性磷酸催化喹啉与可再生二氢菲啶的不对称转移氢化反应。尽管存在外消旋氢化途径的竞争,但仍以高达 91% ee 的高产率提供了多种四氢喹啉。