Nucleic acid related compounds. 57. Synthesis, x-ray crystal structure, lipophilic partition properties, and antiretroviral activities of anomeric 3'-azido-2',3'-dideoxy-2,6-diaminopurine ribosides
作者:Morris J. Robins、Steven G. Wood、N. Kent Dalley、Piet Herdewijn、Jan Balzarini、Erik De Clercq
DOI:10.1021/jm00128a017
日期:1989.8
6-diamino-9-(2-deoxy-beta-D-threo-pentofuranosyl)purine (7). Tritylation of 7 followed by mesylation at O3', deprotection, and displacement of the 3'-mesylate with azide provided a stereodefined synthesis of 2,6-diamino-9-(3-azido-2, 3-dideoxy-beta-D-erythro-pentofuranosyl)purine (AzddDAPR, 4). X-ray crystallographic analysis of 4 showed two orientations of the azido group, but consistent conformational
三甲基甲硅烷基三氟甲磺酸酯催化的2,6-二氨基-9-(3-叠氮基-2,3-二脱氧-α-和-β-D-赤-戊呋喃糖基)嘌呤(3和4)嘌呤的转移糖基化反应的收率低。2,6-二氨基-9-(β-D-核呋喃核糖基)嘌呤(2,6-二氨基嘌呤核糖核苷,DAPR,5)的选择性2'-O-甲苯磺酸化反应,然后由我们的三乙基硼氢化锂促进的1,2-氢化物重排得到2 ,6-二氨基-9-(2-脱氧-β-D-苏-戊呋喃糖基)嘌呤(7)。7的三酰化,然后在O3'处进行甲磺酸化,脱保护并用叠氮化物置换3'-甲磺酸酯,提供了立体定义的2,6-二氨基-9-(3-叠氮基-2,3-dideoxy-beta-D-赤-五呋喃糖基嘌呤(AzddDAPR,4)。X射线晶体学分析4显示了叠氮基团的两个方向,但在其余分子中具有一致的构象特征。相反,已经发现AZT有两个独立的构象。叠氮基功能赋予增强的亲脂性,可以预期其对跨膜的非选择性转运有显着贡