Enantioselective C−H Olefination of α-Hydroxy and α-Amino Phenylacetic Acids by Kinetic Resolution
作者:Kai-Jiong Xiao、Ling Chu、Jin-Quan Yu
DOI:10.1002/anie.201510808
日期:2016.2.18
development of enantioselective C−H activation reactions by desymmetrization. However, the requirement for the presence of two chemically identical prochiral C−H bonds represents an inherent limitation in scope. Reported is the first example of kinetic resolution by a palladium(II)‐catalyzed enantioselective C−H activation and C−C bond formation, thus significantly expanding the scope of enantioselective C−H
Palladium‐Catalyzed Enantioselective Isodesmic C–H Iodination of Phenylacetic Weinreb Amides
作者:Hang Wang、Chunlin Zhou、Zezhong Gao、Shangda Li、Gang Li
DOI:10.1002/anie.202300905
日期:——
Isodesmic reactions represent mild alternatives to other chemical transformations that require harsh oxidizing agents or highly reactive intermediates. However, enantioselective isodesmic C−Hfunctionalization is unknown. Herein, an unprecedented highly enantioselective isodesmic C−Hfunctionalization to access chiral iodinated phenylacetic Weinrebamides via desymmetrization and kinetic resolution
Mechanochemical Assembly of a Nitrile‐Based Directing Group in Arylacetic Acids Using the Passerini 3‐CR: Exploration of the Pd(II)‐Catalyzed meta‐C(sp2)−H Bond Olefination Process
作者:Juvenal García‐Uribe、Sebastián Martínez‐Flores、Valeri Martínez‐Barrita、Luis A. Polindara‐García
DOI:10.1002/ejoc.202301320
日期:2024.5.3
The multicomponent assembly of a nitrile‐based directing group in a set of arylacetic acids under solvent‐free mechanochemical conditions using the Passerini 3‐CR and the subsequent Pd(II)‐mediated meta‐C(sp2)−H bond olefination process has been achieved. The protocol demonstrated that removing the DG under mild conditions from the activated Passerini adducts affords a novel N‐(tert‐butyl)‐2‐(2‐cyanophenyl)‐2‐hydroxyacetamide, which can be re‐utilized in the future as DG in other distal activation processes.