Synthesis of Cyclopentadienes for Cyclopentadienyl Ligands via Cp*Rh<sup>III</sup>-Catalyzed Formal sp<sup>3</sup> C–H Activation/Spiroannulations
作者:Yongzhuang Wang、Xiaoli Huang、Qin Wang、Yuhai Tang、Silong Xu、Yang Li
DOI:10.1021/acs.orglett.0c03982
日期:2021.2.5
An efficient Cp*RhIII-catalyzed formal C(sp3)–H activation/spiroannulation of alkylidene Meldrum’s acids with alkynes has been developed using catalytical Cu(OAc)2 and air as the oxidant. This reaction demonstrates a new and straightforward approach to spirocyclopentadienes with Meldrum’s acid moieties in good to excellent yields under mild reaction conditions with a broad substrate scope. Notably
Ligand-controlled iridium-catalyzed semihydrogenation of alkynes with ethanol: highly stereoselective synthesis of <i>E</i>- and <i>Z</i>-alkenes
作者:Jinfei Yang、Chengniu Wang、Yufeng Sun、Xuyan Man、Jinxia Li、Fei Sun
DOI:10.1039/c8cc09714c
日期:——
iridium-catalyzed semihydrogenation of alkynes to E- and Z-alkenes with ethanol was developed. Effective selectivity control was achieved by ligand regulation. The use of 1,2-bis(diphenylphosphino)ethane (DPPE) and 1,5-cyclooctadiene (COD) was critical for the stereoselective semihydrogenation of alkynes. The general applicability of this procedure was highlighted by the synthesis of more than 40 alkenes, with
The copper-free Sonogashira cross-coupling reaction promoted by palladium complexes of nitrogen-containing chelating ligands in neat water at room temperature
作者:Hong Zhong、Jinyun Wang、Liuyi Li、Ruihu Wang
DOI:10.1039/c3dt52970c
日期:——
2′-dipyridylamine was used as a supporting ligand in the palladium-catalyzed Sonogashira cross-coupling reaction. The reactions between aryliodides and terminal alkynes with different steric hindrance can be efficiently performed in the absence of copper in neat water at room temperature. The superior catalytic performance of the catalytic system was attributed to water solubility of the palladium 2,2′-dipyridylamine
[EN] ARYL-SUBSTITUTED IMIDAZOLES<br/>[FR] IMIDAZOLES SUBSTITUÉS PAR ARYLE
申请人:ST JUDE CHILDRENS RES HOSPITAL
公开号:WO2012045018A1
公开(公告)日:2012-04-05
The compounds of the invention are antagonists of MDM2 and MDMX, with excellent specificity for MDM2 and MDMX over other proteins, and with selective binding affinity to MDMX over MDM2. The compounds can therefore regulate p53 activity and treat a variety of cancers. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.