Synthesis and SAR of 2-phenyl-1-sulfonylaminocyclopropane carboxylates as ADAMTS-5 (Aggrecanase-2) inhibitors
摘要:
A series of 1-sulfonylaminocyclopropanecarboxylates was synthesized as ADAMTS-5 (Aggrecanase-2) inhibitors. After an intensive investigation of the central cyclopropane core including its absolute stereochemistry and substituents, we found compound 22 with an Agg-2 IC(50) = 7.4 nM, the most potent ADAMTS-5 inhibitor reported so far. (c) 2009 Elsevier Ltd. All rights reserved.
通过使用锂化的杂环,芳基或杂芳基硼酸酯和亲电卤素源,通过无过渡金属的sp2-sp2交叉偶联策略,可以实现多种杂芳基芳基化合物的合成。杂二芳基的构建是通过亲电活化芳基-杂芳基硼酸酯络合物进行的,这引发了1,2-从硼向碳原子的迁移。中间体硼酸酯的随后氧化以良好的产率提供了杂联二芳基。已经进行了全面的11 B NMR研究以支持该机理。在没有过渡金属的情况下,两个亲核交叉偶联伙伴之间的交叉偶联显示了可靠的歧管,可以以高收率获得杂二芳基。呋喃,噻吩,苯并呋喃,苯并噻吩和吲哚等各种杂环具有良好的耐受性。最后,
Light-Induced CH Arylation of (Hetero)arenes by In Situ Generated Diazo Anhydrides
作者:David Cantillo、Carlos Mateos、Juan A. Rincon、Oscar de Frutos、C. Oliver Kappe
DOI:10.1002/chem.201502357
日期:2015.9.7
catalyst‐free CH arylation methodology for the preparation of bi(hetero)aryls by the one‐pot reaction of anilines with tert‐butyl nitrite and (hetero)arenes under neutral conditions. The key step in this procedure is the in situ formation and subsequent photochemical (>300 nm) homolytic cleavage of a transient diazo anhydride intermediate. The generated aryl radical then efficiently reacts with a (hetero)arene
A highly regioselective, carbazole based Electron Donor Acceptor (EDA) catalyzed synthesis of biaryl and aryl–heteroaryl compounds is described. Various indole and carbazole derivatives were screened for the Homolytic Aromatic Substitution (HAS) reaction. Tetrahydrocarbazole (THC) was very efficient for the HAS transformation and proceeded via a complex formation between diazonium salt and electron
N,S-chelating triazole-thioether ligand for highly efficient palladium-catalyzed Suzuki reaction
作者:Qiong Yan、Lei Zheng、Miaomiao Li、Yunfeng Chen
DOI:10.1016/j.jcat.2019.07.004
日期:2019.8
1,2,3-Triazole-thioether compounds could serve as efficient ligands for Pd-catalyzed Suzuki reactions of various aryl iodides, bromides and chlorides. The reactions feature wide substrate scope and mild reaction conditions. Besides, shorter reaction time, lower catalyst loadings and quantitative yields with a turnover-frequency (TOF) value of up to 11,880 h−1 are other advantageous of this attractive
1,2,3-三唑-硫醚化合物可以用作钯催化的各种芳基碘化物,溴化物和氯化物的Suzuki反应的有效配体。该反应具有广泛的底物范围和温和的反应条件。此外,更短的反应时间,更低的催化剂载量和定量产率(TOF)值高达11,880 h -1的定量收率是该引人注目的方案的其他优点。晶体结构分析和计算研究表明,相应的螯合钯配合物的较高催化活性归因于较低的能隙和较低的氧化还原电势。
Synthesis of Functionalized 2-Arylthiophenes with Triarylbismuths as Atom-Efficient Multicoupling Organometallic Nucleophiles under Palladium Catalysis
作者:Maddali Rao、Debasis Banerjee、Ritesh Dhanorkar
DOI:10.1055/s-0030-1260554
日期:2011.6
Atom-efficient cross-coupling reactions of functionalized 2-bromo- and 2-iodothiophenes have been demonstrated using triarylbismuths as atom-efficientmulticoupling organometallic nucleophiles under palladium-catalyzed conditions. These couplings with various functionalized triarylbismuths proceeded smoothly to afford the corresponding functionalized 2-arylthiophenes in high yields.
The preparations and some properties of mixed aryl-thienyl oligomers and polymers
作者:Andrew Pelter、Ieuan Jenkins、D.Elfyn Jones
DOI:10.1016/s0040-4020(97)00629-7
日期:1997.7
The syntheses by transition metal coupling reactions of a large number of oligomers constructed from benzene and thiophene rings are described. The first use of arylcadmium chlorides for such coupling reactions is reported. The routes chosen allow for rational variation in the modes of linkage, the substitution and the proportions of the two units. The benzene and thiophene rings are always joined