Synthesis of<i>ortho</i>-Acylphenols through the Palladium-Catalyzed Ketone-Directed Hydroxylation of Arenes
作者:Fanyang Mo、Louis J. Trzepkowski、Guangbin Dong
DOI:10.1002/anie.201207479
日期:2012.12.21
Ketone in charge: A formal ketone‐directed palladium‐catalyzed ortho‐hydroxylation of arenes has been developed as an effective approach to access o‐acylphenols from simple arylketones. A Pd‐catalyzed oxidative ortho‐carbonylation reaction using ketone directing groups to access a ketal–lactone motif is also demonstrated. The ubiquity and versatile nature of ketones make these methods attractive. BTI=PhI(TFA)2;
Ruthenium-Catalyzed C–H Bond Oxygenations with Weakly Coordinating Ketones
作者:Vedhagiri S. Thirunavukkarasu、Lutz Ackermann
DOI:10.1021/ol302956s
日期:2012.12.21
Ruthenium complexes enabled first C(sp(2))-H bond oxygenations of aromatic ketones with excellent functional group tolerance, and broad scope as well as high chemoselectivity and site selectivity.
Pd-Catalyzed CH Oxygenation with TFA/TFAA: Expedient Access to Oxygen-Containing Heterocycles and Late-Stage Drug Modification
作者:Gang Shan、Xinglin Yang、Linlin Ma、Yu Rao
DOI:10.1002/anie.201207458
日期:2012.12.21
Acid brings the oxygen: A generalmethod for palladium‐catalyzed CH oxygenation has been developed for the facilesynthesis of a wide range of functionalized phenols with readily available aryl ketones, benzoates, benzamides, acetanilides, and sulfonamides. A trifluoroacetic acid/trifluoroacetic acid anhydride solvent system serves as the oxygen source and is the critical factor for CH activation