Palladium-Catalyzed Oxidative Ethoxycarbonylation of Aromatic C−H Bond with Diethyl Azodicarboxylate
作者:Wing-Yiu Yu、Wing Nga Sit、Kin-Man Lai、Zhongyuan Zhou、Albert S. C. Chan
DOI:10.1021/ja710555g
日期:2008.3.1
(DEAD) together with Oxone or K2S2O8. Substrates such as 2-arylpyridines, pyrrolidinone, acetylindoline, quinoline, and oximes were ethoxycarbonylated with excellent chemo- and regioselectivities. The catalytic reaction is probably initiated by chelation-assisted cyclopalladation of the ortho-C−H bond. Preliminary studies suggested that reactive ethoxyacyl radicals generated from thermal decomposition
Herbicidal 3-isoxazolidinones and hydroxamic acids
申请人:FMC Corporation
公开号:US04405357A1
公开(公告)日:1983-09-20
Novel 3-isoxazolidinone compounds and novel hydroxamic acid intermediates from which they are prepared exhibit herbicidal activity to grassy and broad-leaf plant species while leaving legumes, especially soybeans, unaffected. The preparation and herbicidal activity of the compounds is exemplified.
Nickel-catalyzed C–P cross-coupling of diphenylphosphine oxide with aryl chlorides
作者:Hong-Yu Zhang、Meng Sun、Yan-Na Ma、Qiu-Ping Tian、Shang-Dong Yang
DOI:10.1039/c2ob26874d
日期:——
diarylphosphine oxide compounds via a Ni-catalyzed cross-coupling of arylchlorides with R2P(O)H has been developed. Notably, this process exhibits the following very attractive features: (i) the process is simpler and operates under mild reaction conditions; (ii) the process is generally cheaper in part because the more accessible arylchloride is used to form the C–P bond; (iii) the process avoids the need
Intermolecular Amidation of Unactivated sp<sup>2</sup> and sp<sup>3</sup> C−H Bonds via Palladium-Catalyzed Cascade C−H Activation/Nitrene Insertion
作者:Hung-Yat Thu、Wing-Yiu Yu、Chi-Ming Che
DOI:10.1021/ja062856v
日期:2006.7.19
reactions. For the reaction of unactivated sp3 C-H bonds, beta-amidation of 1 degrees sp3 C-H bonds versus 2 degrees C-H bonds is preferred. The catalytic reaction is initiated by chelation-assisted cyclopalladation involving C-H bond activation. Preliminary mechanistic study suggested that the persulfate oxidation of primary amides should generate reactive nitrene species, which then reacted with the cyclopalladated
The reactions of dimethylsulfoniummethylide with (E)-aldoxiroes and (E)-ketoximes proceeded smoothly at room temperature and gave moderately good yields of O-methyl (E)-aldoximes and O-methyl (E)-ketoximes, respectively. A possible scheme for the formation of O-methyl (E)-oximes has been discussed.