54151-74-5Relevant articles and documents
A Dichotomy in Cross-Coupling Site Selectivity in a Dihalogenated Heteroarene: Influence of Mononuclear Pd, Pd Clusters, and Pd Nanoparticles-The Case for Exploiting Pd Catalyst Speciation
Eyles, Anthony,Fairlamb, Ian J. S.,Ford, Mark J.,Jeddi, Neda,Scott, Neil W. J.,Simon, Lauriane,Tanner, Theo,Whitwood, Adrian C.,Willans, Charlotte E.
supporting information, p. 9682 - 9693 (2021/07/19)
Site-selective dihalogenated heteroarene cross-coupling with organometallic reagents usually occurs at the halogen proximal to the heteroatom, enabled by intrinsic relative electrophilicity, particularly in strongly polarized systems. An archetypical exam
Preparation method of 4-aryl-2-halopyridine derivatives
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Paragraph 0069-0072; 0078-0079; 0084-0086, (2021/07/27)
4 -aryl -2 - halopyridine derivatives are disclosed. A process for preparing γ - enamine of α-unsaturated nitrile (single-activated) using a halogen source is provided to obtain high yield and efficiency under mild conditions by using 4 - a conventional double activated (double-activated -2 -) substrate through intramolecular cyclization using a halogen source.
γ-Functionalization of α,β-Unsaturated Nitrile in Mild Condition: Versatile Synthesis of 4-Aryl-2-Bromopyridines
Sim, Jaeuk,Viji, Mayavan,Rhee, Jeongtae,Jo, Hyeju,Cho, Suk Joon,Park, Yunjeong,Seo, Seung-Yong,Jung, Kwan-Young,Lee, Heesoon,Jung, Jae-Kyung
supporting information, p. 5458 - 5465 (2019/11/13)
This report describes the synthesis of 4-aryl-2-halopyridines via γ-functionalization of α,β-unsaturated nitriles, which were obtained by the HWE reaction with the corresponding ketones. The key features of our methods involve a conjugated γ-enamine formation of α,β-unsaturated nitrile (enamino nitrile), followed by consecutive intramolecular cyclization, resulting in heteroaromatic compounds like 2-halopyridines, α-pyrone, etc.
A radioactive iodine labeled pyrido [1, 2-a] benzimidazole derivative compound
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Paragraph 0020; 0040, (2017/08/08)
The present invention relates to a radioactive iodine labeled pyrido[1,2-a]benzimidazole derivative compound represented by a certain general formula, or the salt thereof and also relates to a radioactive medicament comprising the compound.
Organometallic compound and organic light emitting device including the same
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Paragraph 0304; 0309-0311, (2017/01/02)
Disclosed are an organometallic compound and an organic light emitting device comprising the same. The organometallic compound is represented by chemical formula 1. The organic light emitting device using the organometallic compound can have a low driving
Triarylbismuthanes as threefold aryl-transfer reagents in regioselective cross-coupling reactions with bromopyridines and quinolines
Rao, Maddali L.N.,Dhanorkar, Ritesh J.
, p. 5214 - 5228 (2014/10/15)
Cross-coupling studies using bromopyridines and bromoquinolines with triarylbismuths as threefold coupling reagents in substoichiometric amounts under Pd-catalysed conditions are disclosed. The reactivity was high with both mono- and dibromopyridyl substrates, and mono- and bis-couplings were carried out regioselectively. A library of monoaryl and diaryl pyridines was formed in high yields. A one-pot strategy provided a simple and straightforward synthesis of both symmetrical and unsymmetrical diarylpyridines. Arylations of 2-bromo- and 3-bromoquinolines were achieved with triarylbismuth reagents. This study demonstrates that triarylbismuths may be used as threefold arylating reagents for the synthesis of aryl pyridines and quinolines through couplings with bromopyridines and bromoquinolines under Pd-catalysed conditions. Copyright
Palladium-catalyzed highly regioselective 2-arylation of 2,x-dibromopyridines and its application in the efficient synthesis of a 17β-HSD1 inhibitor
Zhou, Qizhong,Zhang, Bin,Su, Liangjun,Jiang, Tiansheng,Chen, Rener,Du, Tieqi,Ye, Yuyuan,Shen, Jianfen,Dai, Guoliang,Han, Deman,Jiang, Huajiang
, p. 10996 - 11003 (2014/01/06)
2,3- and 2,5-Dibromopyridines reacted with arylboronic acids, catalyzed by Pd(OAc)2/PPh3 in the presence of K2CO 3 in CH3CN/MeOH (2:1) at 50 C for 24 h, to afford 2-arylpyridines in good to high yield
BRAIN/NEURONAL CELL-PROTECTING AGENT, AND THERAPEUTIC AGENT FOR SLEEP DISORDER
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Page/Page column 43, (2008/06/13)
A compound represented by the formula (I) or a salt thereof; and an agent for protecting a brain/neuronal cell or a therapeutic agent for sleep disorder comprising the compound or salt: wherein Z represents an oxygen or sulfur; R1 represents an
Regioselectivity in alkenyl(aryl)-heteroaryl Suzuki cross-coupling reactions of 2,4-dibromopyridine. A?synthetic and mechanistic study
Sicre, Cristina,Alonso-Gómez, J.-Lorenzo,Cid, M. Magdalena
, p. 11063 - 11072 (2007/10/03)
2,4-Dibromopyridine undergoes a regioselective Suzuki cross-coupling reaction at position 2 with several alkenyl(aryl) boronic acids to render 4-bromo-2-carbon substituted pyridines, difficult to be prepared otherwise, in good yields under palladium catal
SIX-MEMBERED HETEROCYCLES USEFUL AS SERINE PROTEASE INHIBITORS
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Page/Page column 77, (2010/02/15)
The present invention provides compounds of Formula (I) or a stereoisomer or pharmaceutically acceptable salt or solvate form thereof, wherein the variables A, L, Z, X1, X2, X3, X4, and X5 are as defined herein. The compounds of Formula (I) are useful as selective inhibitors of serine protease enzymes of the coagulation cascade and/or contact activation system; for example thrombin, factor Xa, factor XIa, factor IXa, factor VIIa and/or plasma kallikrein. In particular, it relates to compounds that are selective factor XIa inhibitors. This invention also relates to pharmaceutical compositions comprising these compounds and methods of treating thromboembolic and/or inflammatory disorders using the same.