derivatives have been synthesized and evaluated for adenosinedeaminase (ADA) inhibitory activity, in order to introduce simplifications in the ADA inhibitors erythro-9-(2-hydroxy-3-nonyl)adenine (EHNA, 1a) and 3-deaza-EHNA (1c). Opening the pyrimidine or pyridine ring of EHNA or 3-deaza-EHNA respectively led to compounds which are still ADA inhibitors. The most potent compound was erythro-1-(2-hydro
合成了一系列erythro-1-(2-hydroxy-3-nonyl)imidazole衍生物,并评估了其腺苷脱氨酶(ADA)抑制活性,以简化ADA抑制剂erythro-9-(2-hydroxy- 3-壬基)腺嘌呤(EHNA,1a)和3-deaza-EHNA(1c)。打开EHNA或3-脱氮-EHNA的嘧啶或吡啶环分别导致仍为ADA抑制剂的化合物。最有效的化合物是erythro-1-(2-hydroxy-3-nonyl)imidazole-4-carboxamide(5,Ki = 3.53 x 10(-8)M),可为氢键提供潜在的供体和受体位点。缺少该位点之一可以解释该系列中所有化合物的效价顺序。在腺苷和3-deazaadenosine中打开相同的环会导致完全失活的化合物。这些结果支持了存在的假设,