Non-imidazole histamine H3 ligands. Part I. Synthesis of 2-(1-piperazinyl)- and 2-(hexahydro-1H-1,4-diazepin-1-yl)benzothiazole derivatives as H3-antagonists with H1 blocking activities
作者:Krzysztof Walczyński、Roman Guryn、Obbe P. Zuiderveld、Henk Timmerman
DOI:10.1016/s0014-827x(99)00081-6
日期:1999.10
New 2-(1-Piperazinyl)- and 2-(hexahydro-1H-1,4-diazepin-1-yl)benzothiazoles were prepared and tested as H1- and H3-receptor antagonists. A number of compounds showed weak H1-antagonistic activity, with pA2 values ranging from 5.5 to 6.1. The simple alkyl substituted, 2-[1-(4-methyl and 4-ethyl)piperazinyl] analogues show increasing, moderate H3-antagonistic activity (pA2 = 6.0, and pA2 = 7.0). The
制备了新的2-(1-哌嗪基)-和2-(六氢-1H-1,4-二氮杂-1-基)苯并噻唑并作为H1-和H3-受体拮抗剂进行了测试。许多化合物表现出较弱的H1拮抗活性,pA2值为5.5至6.1。简单的烷基取代的2- [1-(1-(4-甲基和4-乙基)哌嗪基]类似物显示出中等的H3拮抗活性(pA2 = 6.0,pA2 = 7.0)。对于哌嗪基和六氢-1H-1,4-二氮杂-1-基同系物序列,具有4-苯基烷基取代基的化合物,无论苯环上对位取代基的物理化学性质如何,均表现出弱的H3-拮抗性pA2值介于4.4至5.6之间的活性。