Iridium Catalysis for CH Bond Arylation of Heteroarenes with Iodoarenes
作者:Benoît Join、Takuya Yamamoto、Kenichiro Itami
DOI:10.1002/anie.200806358
日期:2009.5.4
Efficient couplings using equimolar quantities of each coupling partner and multiple CHbondarylation reactions are achieved with an Ir‐based catalytic system for the CHbondarylation of electron‐rich heteroarenes with iodoarenes to construct extended π‐systems. The dramatic ligand effect on reaction efficiency leads to the discovery that Crabtree's catalyst (see scheme) is the optimal catalyst
Direct Arylation of Heteroarenes Catalyzed by a Palladium-1,10-Phenanthroline Complex
作者:Ryo Takita、Fumiyuki Ozawa、Daichi Fujita
DOI:10.1055/s-0030-1259727
日期:2011.4
A new entry in direct arylation of heteroarenes using Pd(OAc)2 and 1,10-phenanthroline as a nitrogen-based ligand is reported. The long induction period observed at the initial stage of the reaction was effectively reduced by modification of the catalyst preparation, leading to improved chemical yields (69-92%) and shortening of reaction times (3-10 h).