2,3-Dihydro-dithiin and -dithiepine-1,1,4,4-tetroxides: small molecule non-peptide antagonists of the human galanin hGAL-1 receptor
摘要:
The neuropeptide galanin modulates several physiological functions such as cognition, learning, feeding behavior, and depression, probably via the galanin 1 receptor(GAL-R1). Using an HTS assay based on I-125-human galanin binding to the human galanin-l receptor (hGAL-R1), we discovered a series of 1,4-dithiin and dithiipine-1,1,4,4-tetroxides that exhibited binding affinity IC50's to hGAL-R1 ranging from 190 to 2700 nM. Two of the dithiepin analogues, 7 and 23, behaved pharmacologically as hGAL-R1 antagonists in secondary assays involving adenylate cyclase activity and GTP binding to G-proteins. Analogues 7 and 23 were also active in functional assays involving galanin, reversing the inhibitory effect of galanin on acetylcholine (ACh) release in rat brain hippocampal slices and electrically-stimulated guinea pig ileum twitch. (C) 2000 Elsevier Science Ltd. All rights reserved.
2,3-Dihydro-dithiin and -dithiepine-1,1,4,4-tetroxides: small molecule non-peptide antagonists of the human galanin hGAL-1 receptor
摘要:
The neuropeptide galanin modulates several physiological functions such as cognition, learning, feeding behavior, and depression, probably via the galanin 1 receptor(GAL-R1). Using an HTS assay based on I-125-human galanin binding to the human galanin-l receptor (hGAL-R1), we discovered a series of 1,4-dithiin and dithiipine-1,1,4,4-tetroxides that exhibited binding affinity IC50's to hGAL-R1 ranging from 190 to 2700 nM. Two of the dithiepin analogues, 7 and 23, behaved pharmacologically as hGAL-R1 antagonists in secondary assays involving adenylate cyclase activity and GTP binding to G-proteins. Analogues 7 and 23 were also active in functional assays involving galanin, reversing the inhibitory effect of galanin on acetylcholine (ACh) release in rat brain hippocampal slices and electrically-stimulated guinea pig ileum twitch. (C) 2000 Elsevier Science Ltd. All rights reserved.
Facile synthesis of substituted dihydro-1,4-dithiins and -1,4-dithiepins from α-oxo ketene cyclic dithioacetals
作者:Dewen Dong、Ran Sun、Haifeng Yu、Yan Ouyang、Qian Zhang、Qun Liu
DOI:10.1016/j.tetlet.2005.08.128
日期:2005.10
A novel and facile synthesis of substituted 2,3-dihydro-1,4-dithiins and 6,7-dihydro-5H-1,4-dithiepins based on the reactions of α-bromo/hydroxy ketones with α-oxo ketenecyclicdithioacetals has been developed. A general mechanism for the reactions is proposed.
基于α-溴/羟基酮与α-氧代乙烯酮环的反应,可轻松合成新颖的取代的2,3-二氢-1,4-二硫辛和6,7-二氢-5 H -1,4-二硫平已开发出二硫缩醛。提出了反应的一般机理。
Electronic control of product formation in the rearrangement of 1,3-dithian-2-yl-arylmethanols
作者:Chi Wi Ong、Chien Yen Yu
DOI:10.1016/j.tet.2003.09.100
日期:2003.11
1,3-Dithian-2-yl-phenylmethanols undergo efficient rearrangement to afford 2-phenyl-6,7-dihydro-5H-1,4-dithiepines. The reactions were found to show remarkable variation in productsformation that is dictated by the substituents on the aryl ring.
1,3-二噻吩-2-基-苯基甲醇经过有效的重排,得到2-苯基-6,7-二氢-5 H -1,4-二硫平。发现反应显示出产物形成的显着变化,这由芳基环上的取代基决定。