Utilization of a Copper on Iron Catalyst for the Synthesis of Biaryl Systems and Benzoxazines via Oxidative Arylation of Anilide Derivatives
作者:Zoltán Novák、Anna Székely、Ádám Sinai、Edina Tóth
DOI:10.1055/s-0033-1338642
日期:——
Heterogeneous copper on iron catalyst serves as an efficient alternative copper source for arylation reactions using hypervalent iodonium salts. The copper(0) catalyst affords meta-arylation of pivalanilides, while 2-ethynylanilides undergo oxidative carboarylation–ring closure with diaryliodonium salts. Heterogeneous copper on iron catalyst serves as an efficient alternative copper source for arylation reactions
A Meta-Selective Copper-Catalyzed C–H Bond Arylation
作者:Robert J. Phipps、Matthew J. Gaunt
DOI:10.1126/science.1169975
日期:2009.3.20
For over a century, chemical transformations of benzenederivatives have been guided by the high selectivity for electrophilic attack at the ortho/para positions in electron-rich substrates and at the meta position in electron-deficient molecules. We have developed a copper-catalyzed arylation reaction that, in contrast, selectively substitutes phenyl electrophiles at the aromatic carbon–hydrogen sites