Non-Imidazole Histamine H3 Ligands. Part VII. Synthesis, In Vitro and In Vivo Characterization of 5-Substituted-2-thiazol-4-n-propylpiperazines
作者:Roman Guryn、Marek Staszewski、Anna Stasiak、Daniel McNaught Flores、Wiesława Fogel、Rob Leurs、Krzysztof Walczyński
DOI:10.3390/molecules23020326
日期:——
compound ADS-531, a series of 5-substituted-2-thiazol-4-n-propylpiperazines 3 were synthesized and subjected to in vitro pharmacological characterization; the alkyl chain between position 2 of the thiazole ring and the terminal secondary N-methylamino function was elongated from three to four methylene groups and the N-methylamino functionality was substituted by benzyl-, 2-phenylethyl-, and 3-phenyl-propyl-
存在于组胺能神经元和非组胺能神经元上的H +受体充当控制神经递质释放和合成的自体受体或异体受体。先前的研究发现,化合物N-甲基-N-3-苯基烷基-2- [2-(4-(4-正丙基哌嗪-1-基)-1,3-噻唑-5-基]乙-1-胺(ADS-531,2c)对H +豚鼠空肠受体表现出高的体外效力,pA 2 = 8.27。为了优化先导化合物ADS-531的结构,合成了一系列5取代的2-噻唑-4-正丙基哌嗪3并进行了体外药理学表征;噻唑环的2位与末端仲N-甲基氨基官能团之间的烷基链从3个延长至4个亚甲基,并且N-甲基氨基官能团被苄基,2-苯乙基和3-苯基-丙基取代部分。对新颖的非咪唑,5-取代的2-噻唑-4-正丙基-哌嗪3的SAR研究表明,活性最高的化合物3a(pA 2 = 8.38)还具有较弱的竞争H +拮抗活性。因此,选择不具有任何H +拮抗活性的化合物ADS-531,以进一步评估其对重组大鼠和人组胺H