Non-imidazole histamine H3 ligands, Part IV: SAR of 1-[2-thiazol-5-yl-(2-aminoethyl)]-4-n-propylpiperazine derivatives
作者:Anna Frymarkiewicz、Krzysztof Walczyński
DOI:10.1016/j.ejmech.2008.09.019
日期:2009.4
series of 1-[[2-thiazol-5-yl-(2-aminoethyl)]-4-n-propyl]piperazine derivatives have been prepared and in vitro tested as H3-receptor antagonists (the electrically evoked contraction of the guinea pig jejunum). It appeared that by comparison of homologous pairs the 1-[[2-thiazol-5-yl-(2-methyl-2-phenylalkylaminoethyl)]-4-n-propyl]piperazine derivatives (4c1–4c3) have slightly higher activity than their
已经制备了一系列的1-[[[2-噻唑-5-基-(2-氨基乙基)]-4-正丙基]哌嗪衍生物,并作为H 3受体拮抗剂进行了体外测试(电诱发的H 2-受体收缩)。豚鼠空肠)。看起来,通过同源双比较1 - [[2 -噻唑-5-基- (2-甲基-2- phenylalkylaminoethyl)〕 - 4- Ñ -丙基]哌嗪衍生物(4C1 - 4C3)具有比略微更高的活性他们的1- [2-噻唑-5-基-(2-甲基-2-烷基氨基乙基)]-4-正丙基哌嗪类似物(4b1 – 4b3)。在2-甲基烷基酰胺系列中(4a1 – 4a3)观察到较低的活性。该系列中最有效的化合物是1- [2-噻唑-5-基-(2-甲基-2-苯基丙基氨基乙基)]-4-正丙基哌嗪(4c2),pA 2 = 8.27(其烷基类似物(4b2)显示pA 2 = 7.53,相应的酰胺(4a2)显示pA 2 = 7.36)。 选择的化合物(4