An efficient strategy for the para-selective borylation of aromatic esters is described. For achieving high para-selectivity, a new catalytic system has been developed modifying the core structure of the bipyridine. It has been proposed that the L-shaped ligand is essential to recognize the functionality of the oxygen atom of the ester carbonyl group via noncovalent interaction, which provides an unprecedented
[EN] APOPTOSIS INHIBITORS<br/>[FR] INHIBITEURS DE L'APOPTOSE
申请人:NAT INSTITUTE OF BIOLOGICAL SCIENCES BEIJING
公开号:WO2018014802A1
公开(公告)日:2018-01-25
The invention provides compounds that are inhibitors or covalent modifiers of succinate dehydrogenase subunit B (SDHB) and/or inhibitors of apoptosis, and pharmaceutically acceptable salts, hydrides and stereoisomers thereof. The compounds are employed in pharmaceutical compositions, and methods of making and use, including treating a person in need thereof with an effective amount of the compound or composition.
Iridium-catalyzed C–H coupling reaction of heteroaromatic compounds with bis(pinacolato)diboron: regioselective synthesis of heteroarylboronates
作者:Jun Takagi、Kazuaki Sato、John F Hartwig、Tatsuo Ishiyama、Norio Miyaura
DOI:10.1016/s0040-4039(02)01135-8
日期:2002.8
The C–H coupling of aromatic heterocycles with bis(pinacolato)diboron was carried out in octane at 80–100°C in the presence of a 1/2[IrCl(COD)]2-(4,4′-di-tert-butyl-2,2′-bipyridine) catalyst (3 mol%). The reactions of five-membered substrates such as thiophene, furan, pyrrole, and their benzo-fused derivatives exclusively produced 2-borylated products, whereas those of six-membered heterocycles including
Immobilization of Ir(I) complex on covalent triazine frameworks for C H borylation reactions: A combined experimental and computational study
作者:Norini Tahir、Francesco Muniz-Miranda、Jonas Everaert、Pieter Tack、Thomas Heugebaert、Karen Leus、Laszlo Vincze、Christian V. Stevens、Veronique Van Speybroeck、Pascal Van Der Voort
DOI:10.1016/j.jcat.2019.01.030
日期:2019.3
Metal-modified covalent triazine frameworks (CTFs) have attracted considerable attention in heterogeneous catalysis due to their strong nitrogen-metal interactions exhibiting superior activity, stability and hence recyclability. Herein, we report on a post-metalation of a bipyridine-based CTFs with an Ir(I) complex for CH borylation of aromatic compounds. Physical characterization of the Ir(I)-based
of cyclic tetrapyrroles. Oxidative fusion reaction conditions to afford tetraaza[8]circulenes have also been reinvestigated and improved. Substituent effects of cyclic tetrapyrroles and tetrabenzotetraaza[8]circulenes are studied for solid‐state structures and packing structures, redox potentials, and opticalproperties.