4979-79-7Relevant academic research and scientific papers
Modular Access to Spiro-dihydroquinolines via Scandium-Catalyzed Dearomative Annulation of Quinolines with Alkynes
Lou, Shao-Jie,Luo, Gen,Yamaguchi, Shigeru,An, Kun,Nishiura, Masayoshi,Hou, Zhaomin
supporting information, p. 20462 - 20471 (2021/12/03)
The catalytic enantioselective construction of three-dimensional molecular architectures from planar aromatics such as quinolines is of great interest and importance from the viewpoint of both organic synthesis and drug discovery, but there still exist many challenges. Here, we report the scandium-catalyzed asymmetric dearomative spiro-annulation of quinolines with alkynes. This protocol offers an efficient and selective route for the synthesis of spiro-dihydroquinoline derivatives containing a quaternary carbon stereocenter with an unprotected N-H group from readily accessible quinolines and diverse alkynes, featuring high yields, high enantioselectivity, 100% atom-efficiency, and broad substrate scope. Experimental and density functional theory studies revealed that the reaction proceeded through the C-H activation of the 2-aryl substituent in a quinoline substrate by a scandium alkyl (or amido) species followed by alkyne insertion into the Sc-aryl bond and the subsequent dearomative 1,2-addition of the resulting scandium alkenyl species to the C=N unit in the quinoline moiety. This work opens a new avenue for the dearomatization of quinolines, leading to efficient and selective construction of spiro molecular architectures that were previously difficult to access by other means.
Synthesis and biological evaluation of 2-phenyl-4-aminoquinolines as potential antifungal agents
Yang, Rui,Du, Wenhao,Yuan, Huan,Qin, Tianhong,He, Renxiao,Ma, Yanni,Du, Haiying
, p. 1065 - 1075 (2020/11/09)
Abstract: A series of 2-phenyl-4-aminoquinolines were designed, synthesized and evaluated for their antifungal activities against three phytopathogenic fungi in vitro. All of the target compounds were fully elucidated by 1H NMR, 13C
Synthesis, in vitro and in vivo biological evaluation of novel graveolinine derivatives as potential anti-Alzheimer agents
Luo, Wen,Lv, Jian-Wu,Wang, Ting,Zhang, Zhi-Yang,Guo, Hui-Yan,Song, Zhi-Yi,Wang, Chao-Jie,Ma, Jing,Chen, Yi-ping
, (2019/11/29)
A novel series of graveolinine derivatives were synthesized and evaluated as potential anti-Alzheimer agents. Compound 5f exhibited the best inhibitory activity for acetylcholinesterase (AChE) and had surprisingly potent inhibitory activity for butyrylcho
Direct arylation for the synthesis of 2-arylquinolines from N-methoxyquinoline-1-ium tetrafluoroborate salts and arylboronic acids
Ren, Xiaoxiao,Han, Shuaijun,Gao, Xianying,Li, Jingya,Zou, Dapeng,Wu, Yangjie,Wu, Yusheng
, p. 1065 - 1068 (2018/02/19)
A rapid and direct arylation reaction of N-methoxyquinoline-1-ium tetrafluoroborate derivatives and arylboronic acids with high regioselectivety at room temperature was discovered. The reaction shows exceptional functional group tolerance and broad substrate scope regarding both the quinoline derivatives and the arylboronic acids.
Photoredox-mediated Minisci C-H alkylation of N-heteroarenes using boronic acids and hypervalent iodine
Li, Guo-Xing,Morales-Rivera, Christian A.,Wang, Yaxin,Gao, Fang,He, Gang,Liu, Peng,Chen, Gong
, p. 6407 - 6412 (2016/09/28)
A photoredox-mediated Minisci C-H alkylation reaction of N-heteroarenes with alkyl boronic acids is reported. A broad range of primary and secondary alkyl groups can be efficiently incorporated into various N-heteroarenes using [Ru(bpy)3]Cl2 as photocatalyst and acetoxybenziodoxole as oxidant under mild conditions. The reaction exhibits excellent substrate scope and functional group tolerance, and offers a broadly applicable method for late-stage functionalization of complex substrates. Mechanistic experiments and computational studies suggest that an intramolecularly stabilized ortho-iodobenzoyloxy radical intermediate might play a key role in this reaction system.
Chemoselective chromium(II)-catalyzed cross-coupling reactions of dichlorinated heteroaromatics with functionalized aryl Grignard reagents
Steib, Andreas K.,Kuzmina, Olesya M.,Fernandez, Sarah,Malhotra, Sushant,Knochel, Paul
supporting information, p. 1961 - 1965 (2015/01/30)
Chromium(II) chloride catalyzes the chemoselective cross-coupling reaction of dichloropyridines with a range of functionalized (hetero)aromatic Grignard reagents at room temperature. Functional groups, such as esters and acetals, are well tolerated in this transformation. Previously challenging substrates, quinolines and isoquinolines, participate in the selective Cr-catalyzed cross-coupling in cyclopentyl methyl ether (CPME) as the solvent. The effective purging of Cr salts is demonstrated by using various solid supports.
Rewiring chemistry: Algorithmic discovery and experimental validation of one-pot reactions in the network of organic chemistry
Gothard, Chris M.,Soh, Siowling,Gothard, Nosheen A.,Kowalczyk, Bartlomiej,Wei, Yanhu,Baytekin, Bilge,Grzybowski, Bartosz A.
supporting information; experimental part, p. 7922 - 7927 (2012/09/08)
Computational algorithms are used to identify sequences of reactions that can be performed in one pot. These predictions are based on over 86 000 chemical criteria by which the putative sequences are evaluated. The "raw" algorithmic output is then validated experimentally by performing multiple two-, three-, and even four-step sequences. These sequences "rewire" synthetic pathways around popular and/or important small molecules. Copyright
Synthesis of 2,4-diarylquinolines: Nickel-catalysed ligand-free cross-couplings of 4-chloro-2-arylquinolines with arylmagnesium halides in 2-methyltetrahydrofuran
Li, Zhenhua,Xu, Lingmin,Su, Weike
, p. 240 - 242 (2011/07/29)
A ligand-free and room temperature protocol for the synthesis of 2,4-diarylquinolines is described. Treatment of 4-chloro-2-arylquinolines with arylmagnesium halides in the presence of a catalytic amount of nickel(II) chloride without ligands in 2-methylt
Potent DNA-directed alkylating agents: Synthesis and biological activity of phenyl N-mustard-quinoline conjugates having a urea or hydrazinecarboxamide linker
Kakadiya, Rajesh,Dong, Huajin,Kumar, Amit,Narsinh, Dodia,Zhang, Xiuguo,Chou, Ting-Chao,Lee, Te-Chang,Shah, Anamik,Su, Tsann-Long
supporting information; experimental part, p. 2285 - 2299 (2010/06/14)
A series of N-mustard-quinoline conjugates bearing a urea or hydrazinecarboxamide linker was synthesized for antitumor evaluation. The in vitro cytotoxicity studies revealed that compounds with hydrazinecarboxamide linkers were generally more cytotoxic th
NUCLEIC ACID FLUORESCENT STAINS
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Page/Page column 24, (2009/06/27)
The present invention provides fluorescent dye compounds and methods of using the compounds for the staining of nucleic acids. In particular, the dye compounds comprise heterocyclic molecules with hydroxy alkyl and aromatic substituents, and the dye compo
