作者:Robin B. Bedford、Charlotte J. Mitchell、Ruth L. Webster
DOI:10.1039/c003074k
日期:——
Solvent-free reaction conditions facilitate a range of aromatic C-H functionalisations that traditionally require acidic or disfavoured solvents. These reactions include selective ortho- and meta-arylation of aryl carbamates and anilides and selective halogenation reactions.
Ligand-Controlled <i>Para</i>-Selective C–H Arylation of Monosubstituted Arenes
作者:Hui Xu、Ming Shang、Hui-Xiong Dai、Jin-Quan Yu
DOI:10.1021/acs.orglett.5b01802
日期:2015.8.7
In a Pd-catalyzed double C-H activation reaction, a pyridine-type ligand is identified, for the first time, to enable a highly para-selective C-H arylation of monosubstituted arenes. Excellent para-selectivity is achieved with a variety of arenes containing alkyl, methoxyl, and halo substituents.