Synthesis and pharmacological characterization of new tetrahydrofuran based compounds as conformationally constrained histamine receptor ligands
作者:Julian Bodensteiner、Paul Baumeister、Roland Geyer、Armin Buschauer、Oliver Reiser
DOI:10.1039/c3ob40441b
日期:——
A series of tetrahydrofuran based compounds with a bicyclic core that provides conformational restriction were synthesized and investigated by radioligand displacement studies and functional [35S]GTPγS binding assays at the human histamine receptor (hHR) subtypes. The amines 8a and 8b ((1S,3R,5S,6R)- and ((1S,3S,5S,6R)-3-(1H-imidazol-5-yl)-2-oxabicyclo[3.1.0]hexan-6-yl)methanamine), exhibited submicromolar Ki values at the hH3R with 10-fold higher affinities than their corresponding (6S)-epimers and 25- and >34-fold selectivity over the hH4R, respectively. Both compounds act as neutral antagonists at the hH3R with KB values of 181 and 32 nM, respectively. The cyanoguanidines of the imidazole series and the oxazole analogues turned out to be inactive at all hHR subtypes.
我们合成了一系列以四氢呋喃为基础的化合物,其双环核心提供了构象限制,并通过放射性配体置换研究和人类组胺受体(hHR)亚型的[35S]GTPγS 功能结合试验对这些化合物进行了研究。胺 8a 和 8b ((1S,3R,5S,6R)- 和 ((1S,3S,5S,6R)-3-(1H-咪唑-5-基)-2-氧杂双环[3.1.0]己烷-6-基)甲胺)在 hH3R 上表现出亚摩尔 Ki 值,亲和力比其相应的 (6S) -表聚物高 10 倍,对 hH4R 的选择性分别为 25 倍和 34 倍以上。这两种化合物都是 hH3R 的中性拮抗剂,KB 值分别为 181 和 32 nM。咪唑系列的氰胍类化合物和噁唑类似物对所有 hHR 亚型均无活性。