Determination des facteurs provoquant une 变异 de ρ。区别 est faite entre l'influence de la position de l'etat de transition et celle de latribution thermodynamique a la reactive
Efficient Synthesis of Polysubstituted Olefins Using Stable Palladium Nanocatalyst: Applications in Synthesis of Tamoxifen and Isocombretastatin A4
摘要:
A phosphine-free stable palladium nanocatalyst was used for an efficient synthesis of polysubstituted olefins from N-tosylhydrazones and aryl iodides. This methodology was successfully utilized in the synthesis of biologically important tamoxifen and isocombretastatin A4. The nanocatalyst was easily recovered and reused without any apparent loss in size and catalytic activity.
Synthesis of Polysubstituted Alkenes by Heck Vinylation or Suzuki Cross-Coupling Reactions in the Presence of a Tetraphosphane−Palladium Catalyst
作者:Florian Berthiol、Henri Doucet、Maurice Santelli
DOI:10.1002/ejoc.200390161
日期:2003.3
4-tetrakis[(diphenylphosphanyl)methyl]cyclopentane as a catalyst, a range of vinyl bromides undergo Suzukicross-couplings with arylboronic acids in good yields. Furthermore, the catalyst can be used at low loadings, even for reactions of sterically hindered substrates. Mediated by this catalyst, stilbene and 1,1-diphenylethylene undergo Heckreactions with aryl halides to give triarylethylene derivatives
[EN] HETEROCYCLIC DERIVATIVES AND USE THEREOF<br/>[FR] DÉRIVÉS HÉTÉROCYCLIQUES ET LEUR UTILISATION
申请人:C & C RES LAB
公开号:WO2014196793A1
公开(公告)日:2014-12-11
A heterocyclic derivative represented by formula (I), or a pharmaceutically acceptable salt or a stereoisomer thereof, which has an inhibitory effect on the activation of STAT3 protein, and is useful for the prevention or treatment of diseases associated with the activation of STAT3 protein.
Construction of Polysubstituted Olefins through Ni-Catalyzed Direct Activation of Alkenyl CO of Substituted Alkenyl Acetates
作者:Chang-Liang Sun、Yang Wang、Xiao Zhou、Zhen-Hua Wu、Bi-Jie Li、Bing-Tao Guan、Zhang-Jie Shi
DOI:10.1002/chem.200902785
日期:2010.5.25
Reliable companion: For the first time cross‐coupling between alkenyl acetates and arylboroxines/PhZnCl has been developed via Ni catalysis. Alkenyl acetates could be well‐differentiated from aryl acetates (see scheme). This reliable method provides a convenient pathway to construct polysubstituted styrene derivatives.
A heterocyclic derivative represented by formula (I), or a pharmaceutically acceptable salt or a stereoisomer thereof, which has an inhibitory effect on the activation of STAT3 protein, and is useful for the prevention or treatment of diseases associated with the activation of STAT3 protein.