Development of a Rhodium(II)-Catalyzed Chemoselective C(sp<sup>3</sup>)H Oxygenation
作者:Yun Lin、Lei Zhu、Yu Lan、Yu Rao
DOI:10.1002/chem.201502140
日期:2015.10.12
We report the first example of RhII‐catalyzed chemoselective double C(sp3)Hoxygenation, which can directly transform various toluene derivatives into highly valuable aromatic aldehydes with great chemoselectivity and practicality. The critical combination of catalyst Rh(OAc)2, oxidant Selectfluor, and solvents of TFA/TFAA promises the successful delivery of the oxidation with satisfactory yields
Weak Coordination Promoted Regioselective Oxidative Coupling Reaction for 2,2′-Difunctional Biaryl Synthesis in Hexafluoro-2-propanol
作者:Chao Zhang、Yu Rao
DOI:10.1021/acs.orglett.5b02115
日期:2015.9.18
An unprecedented weak coordination promoted dehydrogenative cross-coupling reaction has been developed by palladium catalysis, which provides a convenient access to a wide range of 2,2′-difunctional biaryls from easily accessible substrates. Both HFIP solvent and oxidants serve as the critical factors in this new reaction. A plausible mechanism involving Pd(II)/Pd(IV) is proposed. The reaction demonstrates
The present invention provides a novel compound having plasminogen activator inhibitor-1 inhibitory activity, and an inhibitor of PAI-1 comprising the compound as an active ingredient. The present invention also provides a pharmaceutical composition having an inhibitory action on PAI-1 activity and being efficacious in the prevention and treatment of various diseases whose onset is associated with PAI-1 activity.
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
Pd(II)-Catalyzed Direct <i>ortho</i>-C–H Acylation of Aromatic Ketones by Oxidative Decarboxylation of α-Oxocarboxylic Acids
作者:Pui-Yiu Lee、Peiwen Liang、Wing-Yiu Yu
DOI:10.1021/acs.orglett.7b00677
日期:2017.4.21
A Pd-catalyzed decarboxylative acylation of aromaticketones with α-oxocarboxylic acids was developed, and 1,2-diacylbenzenes were formed in up to 90% yield with excellent ortho-selectivity. This work demonstrates the first successful attempt to direct C–H acylation of aromaticketones without the need for prederivatization to imines. The acylation reaction was inhibited by radical scavengers such