The modified trifluoromethylation protocol applicable to electronically deficient iodopyridinones
摘要:
Utilization of a mixed solvent system of DMF/HMPA=1/1 (v/v) to the KF/Cul/TMSCF3 reagent system proved to significantly affect the reaction, realizing convenient introduction of a trifluoromethyl (CF3) group not only to electron-deficient iodopyridinones with quite a few previous successful examples but also to aliphatic vinylic iodides. (C) 2015 Elsevier Ltd. All rights reserved.
A Rh-catalyzed chelation-assisted C6-selective C–Hactivation/alkylation of 2-pyridones with readily available alkyl carboxylic acids or anhydrides is introduced. The reaction proceeds via substrate decarbonylation. This approach merges C–H functionalization with readily available anhydrides, allowing for the efficient synthesis of various C6-alkylated 2-pyridones with good functional group tolerance
Manganese(I)‐Catalyzed Site‐Selective C6‐Alkenylation of 2‐Pyridones Using Alkynes via C−H Activation
作者:Shanhong Wan、Zhenli Luo、Xin Xu、Haiyang Yu、Jiajie Li、Yixiao Pan、Xin Zhang、Lijin Xu、Rui Cao
DOI:10.1002/adsc.202100056
日期:2021.5.18
A Mn(I)-catalyzed chelation-assisted direct C6−H alkenylation of 2-pyridones with both terminal and internal alkynes in a highlyregio- and stereo-selective manner has been developed. The catalytic system consisting of Mn(CO)5Br catalyst and KOAc additive allows 1-(2-pyridyl)-2-pyridones to undergo alkenylation with various terminalalkynes in methyl tert-butyl ether (MTBE) to furnish the C6-alkenylated
COMPOUNDS AND METHODS FOR TREATING INFLAMMATORY AND FIBROTIC DISORDERS
申请人:Kossen Karl
公开号:US20090318455A1
公开(公告)日:2009-12-24
Disclosed are compounds and methods for treating inflammatory and fibrotic disorders, including methods of modulating a stress activated protein kinase (SAPK) system with an active compound, wherein the active compound exhibits low potency for inhibition of the p38 MAPK; and wherein the contacting is conducted at a SAPK-modulating concentration that is at a low percentage inhibitory concentration for inhibition of the p38 MAPK by the compound. Also disclosed are derivatives and analogs of pirfenidone, useful for modulating a stress activated protein kinase (SAPK) system.
Domino C–H Activation/Directing Group Migration/Alkyne Annulation: Unique Selectivity by d<sup>6</sup>-Cobalt(III) Catalysts
作者:Cuiju Zhu、Rositha Kuniyil、Becky B. Jei、Lutz Ackermann
DOI:10.1021/acscatal.9b05413
日期:2020.4.3
control in Cp*CoIII-catalyzed domino C–Hactivation/pyridine directing group migration/alkyne annulation has been accomplished through the nucleophilicity of an organometallic cobalt intermediate with a d6 electron configuration. Detailed mechanistic studies provided compelling evidence for a facile C–Hactivation along with a favorable migration of the directing group for the Cp*CoIII catalysis, rather
通过具有ad 6电子构型的有机金属钴中间体的亲核性,完成了Cp * Co III催化的多米诺骨牌CH-H活化/吡啶引导基团迁移/炔烃环化反应中的不同选择性控制。详细的机理研究提供了令人信服的证据,证明了C–H的活化很容易,并且Cp * Co III催化的导向基团有良好的迁移,而不是(CO)3 Mn I歧管观察到的β-氧消除。
Trifluoromethylation of (hetero)aryl iodides and bromides with copper(<scp>i</scp>) chlorodifluoroacetate complexes
A new copper-mediated trifluoromethylation reaction using copper(I) chlorodifluoroacetate complexes as reagents is reported. The complex [L2Cu][O2CCF2Cl] (L = bpy, dmbpy, phen) reacted with (hetero)aryl iodides and bromides in the presence of CsF in DMF at 75 °C to afford the trifluoromethylarenes in good to excellent yields. High compatibility with various chemical functions or (hetero)cycles was