designed and synthesized. All derivatives 5–8 showed nanomolar affinities, but only one representative, the 4-pyridiyl derivative 5j, was as potent as the reference compound n-heptyl α-d-mannoside (1b). Furthermore, a loss of affinity was observed for C-glycosides and derivatives where the triazole aglycone is directly N-linked to the anomeric center. A conformational analysis by NMR revealed that
由尿路致病性大肠杆菌(UPEC )引起的尿路感染(UTI)是最流行的传染病之一。受感染最严重的是妇女,她们有40–50%的风险在一生中的某些时候经历至少一次有症状的UTI发作。在感染的初始步骤中,位于细菌菌毛尖端的凝集素FimH与膀胱粘膜上的高甘露糖基化的uroplakin Ia糖蛋白相互作用。这种相互作用对于UPEC定植和侵袭膀胱上皮细胞的能力至关重要。FimH的X射线结构与两种不同的配体(生理结合表位寡甘露糖3和拮抗剂联苯α- d-甘露糖苷4a)共结晶,揭示了不同的结合模式,分别为入库模式和出库模式。为了完成对接模式,即对接模式,其中配体由所谓的酪氨酸门作为宿主,设计并合成了具有增强的柔性的FimH拮抗剂。所有衍生物5 - 8显示纳摩尔亲和性,但只有一个代表,4-吡啶基衍生物5J,是作为有效的作为参照化合物Ñ -庚基α- d -mannoside(1B)。此外,对于三唑酮苷元直接为N的