877-42-9Relevant articles and documents
Imaging of formaldehyde fluxes in epileptic brains with a two-photon fluorescence probe
Chen, Jian,Gu, Jin,Qian, Yong,Shao, Chenwen,Wang, Xueao,Zhu, Hai-Liang
, p. 3871 - 3874 (2020)
A two-photon (TP) fluorescence probe has been developed for imaging endogenous FA fluxes during metabolic and epigenetic processes in animal models, especially in live brains.
Rhodium-Catalyzed C-H Annulation of Free Anilines with Vinylene Carbonate as a Bifunctional Synthon
Nan, Jiang,Yin, Jiacheng,Gong, Xue,Hu, Yan,Ma, Yangmin
supporting information, p. 8910 - 8915 (2021/11/24)
Chemical transformation with vinylene carbonate as an emerging synthetic unit has recently attracted considerable attention. This report is a novel conversion pattern with vinylene carbonate, in which such a vibrant reagent unprecedentedly acts as a difunctional coupling partner to complete the C-H annulation of free anilines. From commercially available substrates, this protocol leads to the rapid construction of synthetically versatile 2-methylquinoline derivatives (43 examples) with excellent functionality tolerance.
Cooperative Lewis Acid Catalysis for the Enantioselective C(sp3)-H Bond Functionalizations of 2-Alkyl Azaarenes
Rai, Pramod,Waiba, Satyadeep,Maji, Kakoli,Sahoo, Dibyaranjan,Maji, Biplab
supporting information, p. 8888 - 8893 (2021/11/24)
Herein, we describe the enantioselective C(sp3)-H bond functionalizations of 2-alkyl azaarenes using a cooperative dual Lewis acid catalysis. An achiral Lewis acid activates the unactivated azaarene partner without the need for a strong base. Orthogonally, a chiral-at-metal Lewis acid catalyst enables LUMO lowering and induces chirality. This method tolerates a range of complex molecular scaffolds and exhibits good to excellent yields and selectivity while accepting a wide variety of functional groups.
A ortho position alkylation method of organic compound containg pyridine
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Paragraph 0108-0116, (2020/12/05)
A process for introducing alkyl at ortho positions of organic compounds containing pyridine. The method is not affected by the kind of substituent bonded to the pyridine and can be alkylated with high positional selectivity and high yield at N-based ortho-position of pyridine without being affected by the kind of substituent introduced to pyridine ortho position (pyridine N-based) can be advantageously used for the preparation of a compound containing an alkyl-introduced pyridine structure.
ZnMe2-Mediated, Direct Alkylation of Electron-Deficient N-Heteroarenes with 1,1-Diborylalkanes: Scope and Mechanism
Jo, Woohyun,Baek, Seung-Yeol,Hwang, Chiwon,Heo, Joon,Baik, Mu-Hyun,Cho, Seung Hwan
supporting information, p. 13235 - 13245 (2020/09/01)
The regioselective, direct alkylation of electron-deficient N-heteroarenes is, in principle, a powerful and efficient way of accessing alkylated N-heteroarenes that are important core structures of many biologically active compounds and pharmaceutical agents. Herein, we report a ZnMe2-promoted, direct C2- or C4-selective primary and secondary alkylation of pyridines and quinolines using 1,1-diborylalkanes as alkylation sources. While substituted pyridines and quinolines exclusively afford C2-alkylated products, simple pyridine delivers C4-alkylated pyridine with excellent regioselectivity. The reaction scope is remarkably broad, and a range of C2- or C4-alkylated electron-deficient N-heteroarenes are obtained in good yields. Experimental and computational mechanistic studies imply that ZnMe2 serves not only as an activator of 1,1-diborylalkanes to generate (α-borylalkyl)methylalkoxy zincate, which acts as a Lewis acid to bind to the nitrogen atom of the heterocycles and controls the regioselectivity, but also as an oxidant for rearomatizing the dihydro-N-heteroarene intermediates to release the product.
Nickel-Catalyzed Dehydrogenation of N-Heterocycles Using Molecular Oxygen
Banerjee, Debasis,Bera, Atanu,Bera, Sourajit
supporting information, (2020/09/02)
Herein, an efficient and selective nickel-catalyzed dehydrogenation of five- and six-membered N-heterocycles is presented. The transformation occurs in the presence of alkyl, alkoxy, chloro, free hydroxyl and primary amine, internal and terminal olefin, trifluoromethyl, and ester functional groups. Synthesis of an important ligand and the antimalarial drug quinine is demonstrated. Mechanistic studies revealed that the cyclic imine serves as the key intermediate for this stepwise transformation.
Synthesis and biological evaluation of 2-quinolineacrylamides
Chen, Mei-Chuan,Chen, Shiou-Sheng,Hsu, Fu-Chun,Lee, Hsueh-Yun,Lin, Mei-Hsiang,Liou, Jing-Ping,Liu, Yi-Ting,Wang, Shih-Wei
, (2020/01/11)
A series of C6-substituted N-hydroxy-2-quinolineacrylamides (3–15), with four types of bridging groups have been synthesized. Most of these compounds exhibit antiproliferative activity against A549 and HCT116 cells and Western blot analysis revealed that they are able to inhibit HDAC. Measurement of the HDAC isoform activity of ether-containing compounds showed that compound 9 has distinct HDAC6 selectivity, more than 300-fold over other isoforms. This paper describes the development of 6-aryloxy-N-hydroxy-2-quinolineacrylamides as potential HDAC6 inhibitors.
Discovery of fused heterocyclic carboxamide derivatives as novel α7-nAChR agonists: Synthesis, preliminary SAR and biological evaluation
Xue, Yu,He, Xiaomeng,Yang, Taoyi,Wang, Yuxi,Liu, Zhenming,Zhang, Guisen,Wang, Yanxing,Wang, Kewei,Zhang, Liangren,Zhang, Lihe
, (2019/08/20)
The α7 nicotinic acetylcholine receptor (α7 nAChR) has emerged as a promising therapeutic target for schizophrenia. In our previous work, a novel series of α7-nAChR agonists bearing scaffold of indolizine were discovered. To explore the effect of aromaticity on the activity and find more active agents, herein, fused heterocyclic carboxamide derivatives were designed and synthesized in this study. Based on the evaluation by two-electrode voltage clamp in Xenopus oocytes, 27 of the synthesized compounds showed obvious agonism of α7 nAChR. Particularly, compounds 10a and 10e showed significantly higher Emax than EVP-6124. The result illustrated the importance of aromaticity to the activity of agonism. Compound 10a, which showed EC50 of 1.88 μM and Emax of 72.4%, was further characterized comprehensively, including co-application with type II positive allosteric modulator PNU-120596, selectivity with other closely related ligand-gated ion channel, etc. The results showed that 10a showed moderate selectivity over other subtypes such as α4β2 and α3β4 nAChR. 10a evoked α7-like currents that were inhibited by MLA and enhanced in the presence of the α7 PAM PNU-120596. The analysis of binding mode and understanding of structure-activity relationship provided insights to develop more potent novel α7-nAChR agonists.
Photocatalytic tandem reaction of primary alcohols with arylamines in the synthesis of amides and alkylquinolines in the presence of a heterogeneous Fe(CrO2)2–TiO2/X system under aerobic conditions
Makhmutov
, p. 68 - 73 (2019/04/25)
A heterogeneous system Fe(CrO2)2–TiO2/X (where X is promoter NiO, CuO, ZnO, Cr2O3, Fe2O3, PrOCl, TbOCl, LaOCl, or EuOCl) was prepared. The photocatalytic activity of the system was tested in the tandem reaction of primary alcohols (BnOH, EtOH) with arylamines aimed at synthesizing benzamides and substituted 2-methylquinolines under aerobic conditions at room temperature.
Synthesis of a class of fluorescent mother nuclei containing quinoline ring
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Paragraph 0016-0018, (2019/07/05)
The invention relates to a class of fluorescent mother nuclei containing a quinoline ring, wherein the fluorescent mother nuclei have a structure represented by the following general formula I. The invention discloses a synthesis method of a class of novel fluorescent mother nuclei containing a quinoline ring, and applications of the fluorescent mother nuclei in fluorescent probe design.