Non-imidazole histamine H3 ligands: part V. synthesis and preliminary pharmacological investigation of 1-[2-thiazol-4-yl- and 1-[2-thiazol-5-yl-(2-aminoethyl)]-4-n-propylpiperazine derivatives
作者:Roman Guryn、Marek Staszewski、Krzysztof Walczyński
DOI:10.1007/s00044-012-0372-8
日期:2013.8
Series of 1-[2-thiazol-4-yl-(2-aminoethyl)]- and 1-[2-thiazol-5-yl-(2-aminoethyl)]-4-n-propylpiperazine 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-aminoethyl)]-4-n-propylpiperazines (3a,b and 4a–d) have much higher potency than
制备了一系列1-[2-噻唑-4-基-(2-氨基乙基)]-和1-[2-噻唑-5-基-(2-氨基乙基)]-4-正丙基哌嗪衍生物,并在作为H 3受体拮抗剂(豚鼠空肠的电诱发收缩)进行体外测试。通过比较同源对,1-[2-噻唑-5-基-(2-氨基乙基)]-4-正丙基哌嗪(3a、b和4a – d)比其类似物1具有更高的效力-[2-噻唑-4-基-(2-氨基乙基)]-4-正丙基哌嗪 ( 2a – k )。基于所获得的结果,我们观察到噻唑环中 2-甲基-2-R-氨基乙基取代基的 5 位有利于组胺 H 3受体拮抗剂活性,而其在 4 位的存在导致几乎在每种情况下,到活动的强烈减少。