An enantioselective oxidative C–H/N–H carbonylation process was developed in this work. A bimetallic Pd/Cu-based catalyst system was found to catalyze enantioselective C(sp2)–H carbonylation of prochiral arylsulfonamides via desymmetrization process in the presence of mono-N-protected amino acid ligands. This reaction provides a facile strategy to the stereoselective construction of the lactam-type
在这项工作中开发了一种对映选择性的氧化CH / NH羰基化过程。发现基于双金属Pd / Cu的催化剂体系在单氮原子保护的氨基酸配体存在下,通过去对称化过程催化前手性芳基磺酰胺的对映选择性C(sp 2)-H羰基化。该反应为内酰胺型产物如异吲哚啉-1-酮和异喹啉-1-酮的立体选择性构建提供了简便的策略,该产物在气球压力下与CO / O 2的混合物具有良好的收率和对映选择性。通过使用密度泛函理论(DFT)的研究合理化了反应机理。
A highly efficient and accessible synthesis of chiral 3-substitutedisoindolinoneframeworks is described. The synthesis involved the Rh(I)-catalyzed asymmetric arylation of boronic acids to 2-halobenzaldimines and the subsequent Rh(I)-catalyzed intramolecular aminocarbonylation of the resulting 2-halobenzylamines using an aldehyde as the carbonyl source. The method tolerates a variety of functional
Design of <i>C</i><i><sub>2</sub></i>-Symmetric Tetrahydropentalenes as New Chiral Diene Ligands for Highly Enantioselective Rh-Catalyzed Arylation of <i>N</i>-Tosylarylimines with Arylboronic Acids
作者:Zhi-Qian Wang、Chen-Guo Feng、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1021/ja0710914
日期:2007.5.1
A new type of C-2-symmetric chiral diene ligand bearing a simple bicyclic [3.3.0] backbone was discovered. (3aS,6aS)-3,6-diphenyl-1,3a,4,6a-tetrahydropentalene was applied successfully in the Rh-catalyzed asymmetric arylation of N-tosylarylimines with arylboronic acids. With the new chiral diene ligand, a broad range of highly enantiomerically enriched diarylmethylamines (98-99% ee) as well as 3-aryl substituted phthalimidines (99% ee) could be easily prepared.