Direct and selective synthesis of 3-arylphthalides via nickel-catalyzed aryl addition/intramolecular esterification
作者:Qing Qiang、Feipeng Liu、Zi-Qiang Rong
DOI:10.1016/j.tet.2021.132162
日期:2021.6
Herein we report a nickel-catalyzed aryl addition/intramolecular esterification in a cascade fashion. Under the combination of commercially available nickel precursor and tridentate ligand, the one pot protocol offers a direct, simple and regioselective approach to access 3-aryl phthalide derivatives from two readily available substrates with good efficiency, broad scope as well as satisfactory functional
tmp4Zr: An Atom-Economical Base for the Metalation of Functionalized Arenes and Heteroarenes
作者:Masilamani Jeganmohan、Paul Knochel
DOI:10.1002/anie.201003558
日期:2010.11.2
Zirconium bases reach lots of places: Only 25 % of zirconium metal is required for the metalation of various functionalized aromatic compounds and heterocycles. All four 2,2,6,6‐tetramethylpiperidyl (tmp) groups of the new basetmp4Zr⋅4 MgCl2⋅6 LiCl (1) are used up in the metalation process. The resulting zirconium species smoothly undergo palladium‐catalyzed cross‐couplings and addition to CO2 and