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