Ambient temperatureruthenium‐catalyzedC−H arylations were accomplished by visiblelight without additional photocatalysts. The robustness of the ruthenium‐catalyzedC−H functionalization protocol was reflected by a broad range of sensitive functional groups and synthetically useful pyrazoles, triazoles and sensitive nucleosides and nucleotides, as well as multifold C−H functionalizations. Biscyclometalated
ChemoselectiveC−H arylations were accomplished through micellar catalysis by a versatile single‐component ruthenium catalyst. The strategy provided expedient access to C−H‐arylated ferrocenes with wide functional‐group tolerance and ample scope through weak chelation assistance. The sustainability of the C−H arylation was demonstrated by outstanding atom‐economy and recycling studies. Detailed computational
Assisted Ruthenium-Catalyzed C−H Bond Activation: Carboxylic Acids as Cocatalysts for Generally Applicable Direct Arylations in Apolar Solvents
作者:Lutz Ackermann、Rubén Vicente、Andreas Althammer
DOI:10.1021/ol800773x
日期:2008.6.5
Catalytic amounts of aromatic carboxylicacid MesCO H enabled efficient ruthenium-catalyzeddirect arylations in apolar solvents with unparalleled broad scope via a concerted deprotonation-metalation mechanism.