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。
Pd-Catalyzed Enantioselective C–H Iodination: Asymmetric Synthesis of Chiral Diarylmethylamines
作者:Ling Chu、Xiao-Chen Wang、Curtis E. Moore、Arnold L. Rheingold、Jin-Quan Yu
DOI:10.1021/ja408864c
日期:2013.11.6
An enantioselective C-H iodination reaction using a mono-N-benzoyl-protected amino acid has been developed for the synthesis of chiral diarylmethylamines. The reaction uses iodine as the sole oxidant and proceeds at ambient temperature and under air.
Palladium-Catalyzed, Enantioselective Formal Cycloaddition between Benzyltriflamides and Allenes: Straightforward Access to Enantioenriched Isoquinolines
作者:Xandro Vidal、José L. Mascareñas、Moisés Gulías
DOI:10.1021/jacs.8b12636
日期:2019.2.6
Benzyl and allyltriflamides can engage in Pd-catalyzed oxidative (4+2) annulations with allenes, to produce highly valuable tetrahydroisoquinoline or dihydropyridine skeletons. The reaction is especially efficient when carried out in the presence of designed N-protected amino acids as metal ligands. More importantly, using this type of chiral ligands, it is possible to perform desymmetrizing, annulative C-H activations of prochiral diarylmethylphenyl amides, and thus obtain the corresponding isoquinolines with high enantiomeric ratios.