An Easy Access to Oxime Ethers by
<scp>Pd‐Catalyzed</scp>
C—O
<scp>Cross‐Coupling</scp>
of Activated Aryl Bromides with Ketoximes and Chalcone Oximes
作者:Reeta、T. M. Rangarajan、Raj Pal Singh、R. P. Singh、Manjula Singh
DOI:10.1002/cjoc.201900540
日期:2020.8
An efficient Pd‐catalyzed method for C—O cross‐coupling of ketoximes and chalcone oximes with activated arylbromides and bromo‐chalcones has been developed. All oxime ethers were obtained in good to excellent yields by [(π‐allyl)PdCl]2/t BuXPhos (L7 ) catalyst system. TrixiePhos (L11 ) was also found to be effective for the oxime coupling. This method offers an easy and smooth coupling of chalcone
已经开发了一种有效的钯催化的方法,用于酮肟和查尔酮肟与活化的芳基溴化物和溴代查耳酮的C-O交叉偶联。通过[(π-烯丙基)PdCl] 2 / t BuXPhos(L7)催化剂体系可以很好地获得所有肟醚。还发现TrixiePhos(L11)对于肟耦合有效。该方法提供了查耳酮肟与活化的芳基溴化物和溴查耳酮的轻松,平滑的偶联,这是以前没有探索过的。
Synthesis of novel chalcones through palladium-catalyzed C O cross-coupling reaction of bromo-chalcones with ethyl acetohydroxamate and their antiplasmodial evaluation against Plasmodium falcipuram in vitro
作者:Reeta、Rajendran Vinoth、T.M. Rangarajan、Ayushee、Rishi Pal Singh、Manjula Singh
DOI:10.1016/j.bioorg.2019.02.016
日期:2019.5
An efficient method for palladium-catalyzed CO cross-coupling of ethyl acetohydroxamate (EAcHO) with 4-bromo-chalcones has been developed to synthesize novel chalcones. The two supporting ligands, namely tBuXPhos (L7), and cataCXium®PIntB (L16) were found to be effective ligands towards the Pd-catalyzed CO cross-coupling reaction to afford the desired product in moderate to excellent yields (50-99%)
AROMATIC AMINE DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT COMPRISING SAME
申请人:Idemitsu Kosan Co., Ltd.
公开号:EP2589596A1
公开(公告)日:2013-05-08
An aromatic amine derivative represented by the following formula (1), wherein at least one of Ar1 to Ar3 is represented by the following formula (2), wherein X1 to X3 are independently a nitrogen atom or CR2, provided that two of X1 to X3 are a nitrogen atom and X1 and X3 are not simultaneously a nitrogen atom.
There are described RORγ modulators of the formula (I),
or stereoisomers, tautomers, pharmaceutically acceptable salts, solvates, or prodrugs thereof, wherein all substituents are defined herein. Also provided are pharmaceutical compositions comprising the same. Such compounds and compositions are useful in methods for modulating RORγ activity in a cell and methods for treating a subject suffering from a disease or disorder in which the subject would therapeutically benefit from modulation of RORγ activity, for example, autoimmune and/or inflammatory disorders.
A general and efficient Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones
作者:T.M. Rangarajan、Kavita Devi、Akhilesh K. Verma、Rishi Pal Singh、Raj Pal Singh
DOI:10.1016/j.jfluchem.2016.04.013
日期:2016.6
An efficient unprecedented Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones has been unveiled. The oxygen nucleophiles (fluoroalcohols) experience the rapid C-O bond forming reaction for the first time, albeit the alcohols are known to be a weak nucleophile and have greater competing beta-hydride elimination in the transition-metal-catalyzed (especially Pd and Cu) C-O cross-coupling reaction. The higher fluoroalcohols have also been effectively coupled with bromo-chalcones with relatively lower rate. (C) 2016 Elsevier B.V. All rights reserved.