Transition Metal Catalyst‐Free, Base‐Promoted 1,2‐Additions of Polyfluorophenylboronates to Aldehydes and Ketones
作者:Zhiqiang Liu、Goutam Kumar Kole、Yudha P. Budiman、Ya‐Ming Tian、Alexandra Friedrich、Xiaoling Luo、Stephen A. Westcott、Udo Radius、Todd B. Marder
DOI:10.1002/anie.202103686
日期:2021.7.19
A novel protocol for the transition metal-free 1,2-addition of polyfluoroaryl boronate esters to aldehydes and ketones is reported, which provides secondary alcohols, tertiary alcohols, and ketones. Control experiments and DFT calculations indicate that both the ortho-F substituents on the polyfluorophenyl boronates and the counterion K+ in the carbonate base are critical. The distinguishing features
报道了一种将多氟芳基硼酸酯与醛和酮进行无过渡金属 1,2-加成的新方案,可提供仲醇、叔醇和酮。对照实验和 DFT 计算表明,多氟苯基硼酸酯上的邻位 F 取代基和碳酸盐碱中的抗衡离子 K +都很关键。该方法的显着特点包括使用市售起始原料以及与多种羰基化合物进行广泛的反应,从而获得中等至优异的产率。在这一系列外消旋多氟芳基甲醇中,涉及 O−H⋅⋅⋅O 和 O−H⋅⋅⋅N 氢键以及芳烃-全氟芳烃相互作用的有趣结构特征也得到了解决。
C–H Borylation by Platinum Catalysis
作者:Takayuki Furukawa、Mamoru Tobisu、Naoto Chatani
DOI:10.1246/bcsj.20160391
日期:2017.3.15
platinum-catalyzed borylation of aromatic C–H bonds. N-Heterocyclic carbene-ligated platinum catalysts are found to be efficient catalysts for the borylation of aromatic C(sp2)–H bonds when bis(pinacolato)diboron is used as the boron source. The most remarkable feature of these Pt catalysts is their lack of sensitivity towards the degree of steric hindrance around the C–H bonds undergoing the borylation reaction
Copper‐Catalyzed Oxidative Cross‐Coupling of Electron‐Deficient Polyfluorophenylboronate Esters with Terminal Alkynes
作者:Zhiqiang Liu、Yudha P. Budiman、Ya‐Ming Tian、Alexandra Friedrich、Mingming Huang、Stephen A. Westcott、Udo Radius、Todd B. Marder
DOI:10.1002/chem.202002888
日期:2020.12.18
We report herein a mild procedure for the copper‐catalyzed oxidative cross‐coupling of electron‐deficient polyfluorophenylboronate esters with terminal alkynes. This method displays good functional group tolerance and broad substrate scope, generating cross‐coupled alkynyl(fluoro)arene products in moderate to excellent yields. Thus, it represents a simple alternative to the conventional Sonogashira
[EN] COMPOUNDS AND METHODS OF USE<br/>[FR] COMPOSÉS ET LEURS PROCÉDÉS D'UTILISATION
申请人:MEDIVATION TECHNOLOGIES INC
公开号:WO2015103355A1
公开(公告)日:2015-07-09
This disclosure provides compounds and compositions and methods of using those compounds and compositions to treat diseases and disorders associated with excessive transforming growth factor-beta (TGFβ) activity. This disclosure also provides methods of using the compounds in combination with one or more cancer immunotherapies.
Method for preparing aminoarylborane compounds or derivatives thereof
申请人:Université de Bordeaux I
公开号:EP2881398A1
公开(公告)日:2015-06-10
The present invention provides a process for the preparation of aminoarylborane compounds and derivatives thereof comprising a step of arylation by reacting an aryl chloride with an aminoborane compound in the presence of a catalytic system.
Typically, the transformation comprises, converting Aryl-chloride Ar-Cl with an aminoborane such as
into an aminoarylborane compound of the following formula: