nitro group followed by nitrous acid cyclization. Extensive antiviral evaluation revealed that only 8-aza-neplanocin A (7) had enough antiviral activity to warrant further studies. This compound showed weak antiviral activity against HSV-1, HSV-20 and the thymidine kinase deficient (TK-) HSV-1. However, it displayed good antiviral activity against human cytomegalovirus (HCMV) at a concentration of 0
报道了天然存在的核苷clatocine(1)的
环戊烯碳环类似物的合成。从外消旋
环戊烯基胺(10)开始,构建了clitocine类似物4和相关的1,6-dihydro-6-oxo,5和2-amino-1,6-dihydro-6-oxo,6的类似物的杂环部分。。在硝基还原
亚硝酸后,将这些化合物分别转化为8-氮杂-neplanocin A(7),8-氮杂-neplanocin D(8,
肌苷类似物)和相应的8-氮杂-
鸟苷类似物9。环化。广泛的抗病毒评估显示,只有8-氮杂-neplanocin A(7)具有足够的抗病毒活性,值得进一步研究。该化合物对HSV-1,HSV-20和
胸苷激酶缺陷(TK-)HSV-1的抗病毒活性较弱。但是,它在0.40–2.50μg/ ml的浓度下对人巨细胞病毒(HCMV)表现出良好的抗病毒活性,远低于细胞毒性阈值。该活性谱与涉及抑制酶
腺苷半胱
氨酸
水解酶的作用机理是一致的。