6,8-Dibromo-1,2,3,4-tetrahydroquinoline (2) and 3,6,8-tribromoquinoline (3) were converted into the corresponding cyano derivatives via copper assisted nucleophilic substitution reactions. While bromination of 6-bromo-8-cyanotetrahydroquinoline (11) gave 3,6-dibromo-8-cyanoquinoline (8), the reaction of dicyano-1,2,3,4-tetrahydroquinoline (12) resulted in the formation of an unexpected dimer (15). (C) 2015 Elsevier Ltd. All rights reserved.
Gold(0) catalyzed dehydrogenation of N-heterocycles
作者:Elumalai Kumaran、Weng Kee Leong
DOI:10.1016/j.tetlet.2018.09.050
日期:2018.10
Gold nanoclusters are good catalyst precursors for the catalytic dehydrogenation of indolines, tetrahydroquinazolines, and related N-heterocycles. The catalytically active species is presumably Au(0) nanoparticles.
Regioselective bromination: Synthesis of brominated methoxyquinolines
作者:Osman Çakmak、Salih Ökten
DOI:10.1016/j.tet.2017.07.044
日期:2017.9
valuable polyfunctional brominated methoxyquinolines 10–13, 20–21, and 24–25. Three regioselective routes are described for convenient preparation of brominated methoxyquinolines at the C-2, C-3, and C-5 positions with consecutive reaction steps under mild reaction conditions using molecular bromine. While bromination of 6-bromo-8-methoxy-1,2,3,4-tetrahydroquinoline (8) selectively gave 3,6-dibrom
4-tetrahydroquinoline (7) in efficient yields (75 and 90%, respectively). 6-Bromo- (4) and 6,8-dibromo-1,2,3,4-tetrahydroquinolines (6) were converted to 6-bromo- (1) and 6,8-dibromo quinolines (2), respectively, by aromatization with DDQ in 83 and 77% yields, respectively. Several novel trisubstituted quinoline derivatives were efficiently prepared via lithium–halogen exchange reactions of tribromide
Synthesis of aryl-substituted quinolines and tetrahydroquinolines through Suzuki–Miyaura coupling reactions
作者:Salih Ökten
DOI:10.1177/1747519819861389
日期:2019.7
The synthesis and characterization of substituted (trifluoromethoxy, thiomethyl, and methoxy) phenyl quinolines is described. Dichlorobis(triphenylphosphine)palladium(II)-catalyzed Suzuki–Miyaura cross-coupling of 6-bromo- and 6,8-dibromo-1,2,3,4-tetrahydroquinolines, 5-bromo-8-methoxyquinoline, and 5,7-dibromo-8-methoxyquinoline with substituted phenylboronic acids affords the corresponding 6-aryl-
Biological activity and molecular docking studies of some new quinolines as potent anticancer agents
作者:Tuğba Kul Köprülü、Salih Ökten、Vildan Enisoğlu Atalay、Şaban Tekin、Osman Çakmak
DOI:10.1007/s12032-021-01530-w
日期:2021.7
this study is to investigate the antiproliferative and cytotoxic properties and the action mechanism of substituted quinoline and tetrahydroquinolines 3, 4, 5, 7, and 8 against rat glioblastoma (C6), human cervical cancer (HeLa), human adenocarcinoma (HT29) cancer cell lines by BrdU Cell Proliferation ELISA, Lactate Dehydrogenase, DNA laddering and Topoisomerase I assays. The results of the study showed
摘要 本研究的目的是研究取代喹啉和四氢喹啉3、4、5、7和8对大鼠胶质母细胞瘤 (C6)、人宫颈癌 (HeLa)、人腺癌 (HT29)的抗增殖和细胞毒性特性以及作用机制。) 癌细胞系通过 BrdU 细胞增殖 ELISA、乳酸脱氢酶、DNA 阶梯和拓扑异构酶 I 测定。研究结果表明,6,8-二溴四氢喹啉3对 C6、HeLa 和 HT29 细胞系具有体外抗增殖活性,而吗啉/哌嗪取代喹啉7和8对 C6 细胞系显示出选择性抗增殖活性,IC 50值分别为 47.5 和 46.3 µg/mL。此外,6,8-dibromoTHQ 3 会导致 DNA 断裂,但不会抑制拓扑异构酶 I (Topo I) 酶。另一方面,化合物 8不引起 DNA 阶梯,而8抑制 Topo I 酶。根据这些结果,6,8-dibromoTHQ 3刺激 C6 细胞系的细胞凋亡,而 6,8-dibromo-3-morhonilylquinoline