New Substituted Piperazines as Ligands for Melanocortin Receptors. Correlation to the X-ray Structure of “THIQ”
作者:Felikss Mutulis、Sviatlana Yahorava、Ilze Mutule、Aleh Yahorau、Edvards Liepinsh、Sergei Kopantshuk、Santa Veiksina、Kaspars Tars、Sergey Belyakov、Anatoly Mishnev、Ago Rinken、Jarl E. S. Wikberg
DOI:10.1021/jm0311285
日期:2004.8.1
characterized structurally and pharmacologically. First, several THIQ imitations lacking the triazole moiety were prepared. Syntheses included acylation of 4-phenylpiperazine or 4-cyclohexylpiperazine. In two cases the tertiary amine function was replaced by the corresponding N-oxide. To obtain more complex structures, a 4-substituted piperazine ring was formed by alkylation of the primary amino group
合成了一系列黑皮质素4受体(MC4R)特异性小分子激动剂“ THIQ”的哌嗪类似物,并在结构和药理上进行了表征。首先,准备了一些缺少三唑部分的THIQ仿制品。合成包括4-苯基哌嗪或4-环己基哌嗪的酰化。在两种情况下,叔胺官能团被相应的N-氧化物代替。为了获得更复杂的结构,通过用N,N-双(2-氯乙基)苄胺烷基化环己烷衍生的氨基醇的伯氨基,形成4-取代的哌嗪环。首先用甲磺酰氯活化中间体的羟基,然后将原位形成的磺酸酯与1,2,4-三唑的钠盐引入反应中。在一种情况下(即,制备23c)在环己烷环的碳上引入1,2,4-三唑部分。另外,该中间体含有通过其氮原子与反应中心附近的环己烷环碳连接的哌嗪部分。如本文的NMR和X射线研究中所确定的,该取代在保留1,2-二取代的环己烷的初始反式构型的情况下进行。为了获得23c的纯对映异构体,将其前体21c在Chirobiotic V柱上进行手性色谱法。将获得的衍生