Combination of Two Pharmacophoric Systems: Synthesis and Pharmacological Evaluation of Spirocyclic Pyranopyrazoles with High σ<sub>1</sub> Receptor Affinity
作者:Torsten Schläger、Dirk Schepmann、Kirstin Lehmkuhl、Jörg Holenz、Jose Miguel Vela、Helmut Buschmann、Bernhard Wünsch
DOI:10.1021/jm200585k
日期:2011.10.13
phenyl substituent occupies a previously unrecognized hydrophobic region of the σ1 receptor resulting in additional lipophilic interactions. The spirocyclic pyranopyrazoles are very selective against the σ2 subtype, the PCP binding site of the NMDA receptor, and further targets. Despite high σ1 affinity, the cyclohexylmethyl derivative 17i (Ki (σ1) = 0.55 nM) and the isopentenyl derivative 17p (Ki (σ1)
小说类螺环σ的1个配体3(6',7'-二氢-1' ħ -螺[哌啶-4,4'-吡喃并[4,3-C]吡唑])通过有力的组合设计σ 1个配体1和2在一个分子。通过位置1',1和6'上取代基的变化,得出了彻底的结构亲和关系。而小富电子杂环甲基吡被较少受到σ耐受1受体蛋白,引进一个苯基取代基,而不是导致具有高配体的甲基σ 1亲和力。据推测,所述附加苯基取代基占据σ的一个以前未被认识的疏水区域1导致额外的亲脂相互作用的受体。螺环pyranopyrazoles是针对σ非常有选择性的2亚型,NMDA受体的PCP结合位点,和进一步的目标。尽管高σ 1的亲和力,所述环己基甲基衍生物17I(ķ我(σ 1)= 0.55 nm),而异戊烯衍生物17P(ķ我(σ 1)= 1.6 nm)的显示,在辣椒素测定仅具有低抗异常性疼痛活性。