Photoinduced Palladium‐Catalyzed Negishi Cross‐Couplings Enabled by the Visible‐Light Absorption of Palladium–Zinc Complexes
作者:Irini Abdiaj、Lena Huck、José Miguel Mateo、Antonio de la Hoz、M. Victoria Gomez、Angel Díaz‐Ortiz、Jesús Alcázar
DOI:10.1002/anie.201808654
日期:2018.10
A visible‐light‐induced Negishicross‐coupling is enabled by the activation of a Pd0–Zn complex. With this photocatalytic method, the scope of deactivated aryl halides that can be employed in the Negishicoupling was significantly expanded. NMR experiments conducted in the presence and absence of light confirmed that the formation of the palladium–zinccomplex is key for accelerating the oxidative
Iridium-Catalyzed Enantioselective Alkene Hydroalkylation via a Heteroaryl-Directed Enolization–Decarboxylation Sequence
作者:Changcheng Jing、Wenbin Mao、John F. Bower
DOI:10.1021/jacs.3c10163
日期:2023.11.8
heteroaryl tert-butyl acetates occur with complete branched selectivity and very high enantioselectivity. The initial adducts undergo acid promoted decarboxylation in situ to provide alkylated heteroarenes possessing defined β-stereocenters. The processes are postulated to proceed via a stereodefined chiral Ir-enolate, which arises upon heteroarenedirected enolization of the heteroaryl acetate precursor. The