Organocatalytic Enantioselective Oxidative CH Alkenylation and Arylation of<i>N</i>-Carbamoyl Tetrahydropyridines and Tetrahydro-β-carbolines
作者:Xigong Liu、Zhilin Meng、Chengkun Li、Hongxiang Lou、Lei Liu
DOI:10.1002/anie.201500703
日期:2015.5.11
The first organocatalyticenantioselectiveCHalkenylation and arylation reactions of N‐carbamoyl tetrahydropyridines and tetrahydro‐β‐carbolines (THCs) are described. The metal‐free processes represent an efficient and straightforward approach to a variety of structurally and electronically diverse α‐substituted tetrahydropyridines and THCs in good yields with excellent regio‐ and enantioselectivities
Asymmetric Hydrogenation of Cyclic Imines with an Ionic Cp*Rh(III) Catalyst
作者:Chaoqun Li、Jianliang Xiao
DOI:10.1021/ja8050958
日期:2008.10.8
When associated with a noncoordinating bulky conunteranion, a cationic Cp*Rh(III)-diamine catalyst displayed excellent enantioselectivities in asymmetric hydrogenation of cyclic imines, affording bioactive tetrahydroisoquinolines and tetrahydro-beta-carbolines frequently with 99% ee's.
Engineering Imine Reductase for Efficient Biosynthesis of 1-Aryl-Tetrahydro-β-Carbolines and Their N-Methylation Products
expanded the substrate tolerance of the enzyme, enabling efficient, stereoselective synthesis of a series of ortho-, meta-, para-, and multi-substituted (S)-1-phenyl-THβCs. By combining enzymatic imine reduction and whole-cell N-methylation in one pot, we further developed a cost-effective strategy to directly synthesize (S)-N-methyl 1-phenyl-THβCs from DHβC substrates. Our results not only provide an effective