1612-64-2Relevant academic research and scientific papers
Protonation dependent electron transfer in 2-styrylquinolines
Wang, Shun-Li,Tong-Ing, Ho
, p. 434 - 438 (1997)
The absorption and emission spectra for 4′-substituted-2-trans-styrylquinoline (X = NMe2, 1; H, 2; CN, 3; NO2, 4) and 4′-N,N-dimethylamino-2-trans-styrylnaphthalene 5 were studied in various solvents and at various acid concentration
Design, synthesis, and biological evaluation of 2-arylethenylquinoline derivatives as multifunctional agents for the treatment of Alzheimer's disease
Wang, Xiao-Qin,Xia, Chun-Li,Chen, Shuo-Bin,Tan, Jia-Heng,Ou, Tian-Miao,Huang, Shi-Liang,Li, Ding,Gu, Lian-Quan,Huang, Zhi-Shu
, p. 349 - 361 (2015)
A series of new 2-arylethenylquinoline derivatives (4a1-4a12, 4b1-4b8, 4c1-4c4, 4d1-4d3 and 4e1-4e9) were designed, synthesized, and evaluated as potential multifunctional agents for the treatment of Alzheimer's disease (AD). In vitro studies showed that these synthetic compounds inhibited self-induced Aβ1-42 aggregation effectively ranged from 23.6% to 83.9% at the concentration of 20 μM, and acted as potential antioxidants and biometal chelators. Their structure-activity relationships were obtained and discussed. In particular, compound 4b1, the most active compound, displayed strong inhibitory activity with an IC50 value of 9.7 μM for self-induced Aβ1-42 aggregation, good antioxidative activity with a value of 3.9-fold of Trolox, potent inhibitory activity for cholinesterase with IC50 values of 0.2 μM and 64.1 μM against butyrylcholinesterase (BuChE) and acetylcholinesterase (AChE), respectively. Besides, 4b1 was also capable of disassembling the self-induced Aβ1-42 aggregation fibrils with a ratio of 59.8% at 20 μM concentration, and had a good metal chelating activity. Taken together, these results suggest that compound 4b1 might be a promising lead compound for AD treatment.
PH-sensitive fluorescent probe as well as preparation method and application thereof
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Paragraph 0094-0095, (2020/11/22)
The invention provides a fluorescent probe capable of being used for gamma ray radiation dose detection. The fluorescent probe comprises a pure organic fluorescent material and a polymer matrix; the polymer matrix in the fluorescent probe generates protons after being irradiated by gamma rays, the pure organic fluorescent material has a relatively large resonance structure, the structure is extremely sensitive to pH, and after the structure is combined with the protons generated in the polymer matrix, a fluorescence spectrum generates relatively large displacement, so that the gamma ray radiation dose is detected according to the spectrum.
Fluorescent quinoline derivative, preparation method thereof, composition and application
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Paragraph 0116-0121, (2019/10/02)
The invention discloses a fluorescent quinoline derivative, a preparation method thereof, a composition and application, and relates to a compound of the general formula (I) or salt thereof, a preparation method thereof, a pharmaceutical composition containing the compound or the salt thereof and application of the compound or the salt thereof, wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11,R12, R13, R14 and n are defined in the description. The compound of the general formula (I) or the salt thereof can be used as fluorescent reporter molecules, and can be applied to in vitro test andin vivo imaging of different types of cancers and early diagnosis of tumors, especially navigation therapy in precise surgery of tumors, evaluation of post-operative efficacy and the like.
Use of nitrogen-containing heterocyclic radical substituted alkene compounds
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Paragraph 0216-0218; 0235-0236, (2017/09/12)
The invention relates to new use of a series of nitrogen-containing heterocyclic radical substituted alkene compounds, and more specifically relates to use of the compounds represented by general formula a or salts thereof in bioimaging, pH value detection, biomacromolecule detection or cell microenvironment detection, wherein Z, S1, S2 and R1 are defined as the specification. The compounds are utilized as the fluorescent dye for bioimaging, fluorescent pH probe for pH value detection and/or diagnostic agent for tumor cell detection. The compounds involved in the invention have excellent imaging effect, and shows the single component multicolor property, can be used for single component multicolor imaging or conventional imaging, etc., and haves enormous application prospect in bioimaging and tumor detection. (formula a).
Direct alkenylation of 2-substituted azaarenes with carbonyls via C-H bond activation using iron-based metal-organic framework Fe3O(BPDC)3 as an efficient heterogeneous catalyst
Dang, Hang T.,Lieu, Thien N.,Truong, Thanh,Phan, Nam T.S.
, p. 237 - 245 (2016/05/19)
A porous crystalline metal-organic framework Fe3O(BPDC)3 was synthesized from the reaction of biphenyl-4,4′-dicarboxylic acid and iron(III) chloride hexahydrate by a solvothermal method in the presence of acetic acid, and was characterized by using a variety of different techniques. The Fe3O(BPDC)3 could be used as an efficient heterogeneous catalyst in the synthesis of 2-alkenylazaarenes using the direct alkenylation of 2-substituted azaarenes with carbonyls via C-H bond activation. The presence of acetic acid as a co-catalyst accelerated the transformation significantly. The Fe3O(BPDC)3 exhibited better performance in this transformation then other MOFs such as Fe3O(BDC)3, Cu2(OBA)2(BPY), Cu2(BDC)2(DABCO), Ni2(BDC)2(DABCO), Zn-MOF-74, and Cu2(NDC)2(DABCO). The Fe3O(BPDC)3 also exhibited higher catalytic activity than that of several homogeneous catalysts such as FeCl2, FeCl3, CuCl2, Zn(OAc)2, Zn(NO3)2, and Ni(OAc)2. The Fe3O(BPDC)3 catalyst could be recovered and reused several times in the synthesis of 2-alkenylazaarenes without a significant degradation in catalytic activity. To the best of our knowledge, 2-alkenylazaarenes was not previously synthesized via the direct alkenylation of 2-substituted azaarenes with carbonyls using heterogeneous catalysts.
Domino synthesis of protochromic oN-OFF-ON luminescent 2-styryl quinolines
Cinar, Rahime,Nordmann, Jan,Dirksen, Elena,Mueller, Thomas J. J.
, p. 2597 - 2604 (2013/06/05)
The microwave-assisted coupling-isomerization reaction (MACIR) opens a straightforward domino access to 2-styryl quinolines in good to excellent yields. The push-pull character of these lumophores can be enhanced by placing a dimethyl amino group as an auxochrome in the para-position of the styryl moiety whereas anti-auxochromes are located in the 6-position of the quinoline part. The optical absorption and emission properties of the compounds were studied in solvents of different polarity and at various pH. The pronounced proto- and solvochromicity of the absorption and emission properties qualify them as luminescent pH sensors with ON-OFF-ON emission profiles triggered by pH variation over a broad pH range. The electronic structure of the chromophores is rationalized by DFT calculations.
Microwave-assisted solvent-free synthesis of 2-styrylquinolines in the presence of zinc chloride
Li,Gavrishova,Budyka
, p. 823 - 828 (2012/11/13)
An efficient solvent-free procedure has been developed for the synthesis of (E)-2-styrylquinoline derivatives under microwave irradiation in the presence of zinc chloride. The developed procedure is advantageous due to shorter reaction time and simpler wo
Excited-state proton transfer and excited-state de-hydrogen bonding of the push-pull styryl system
Wang, Shun-Li,Gao, Guo-Yi,Ho, Tong-Ing,Yang, Li-Yu
, p. 217 - 222 (2007/10/03)
The excited-state reaction of push-pull styryl system was studied in this work. In the excited state, compounds of 2-StP-NMe2, 2-StQ-NMe 2, 4-StQ-NMe2 and 4-StP-NMe2 possess a sufficiently large acidity change f
Biological evaluation of substituted quinolines
Franck, Xavier,Fournet, Alain,Prina, Eric,Mahieux, Renaud,Hocquemiller, Reynald,Figadere, Bruno
, p. 3635 - 3638 (2007/10/03)
Several quinolines were synthesized and evaluated in vitro against several parasites (Trypanosoma brucei, T. cruzi, Leishmania infantum, L. amazonensis, Plasmodium falciparum). Then, they were evaluated in vitro (at 10μM), against HTLV-1 transformed cells
