3-deaza-2′,3′-dideoxyadenosine (1b) is described. The 4-chloro-lH-imidazo[4,5-c]pyridinyl anion derived from 5 was reacted with either 2′-deoxyhalogenose 6 or 2′,3′-dideoxyhalogenose 10 yielding two regioisomeric (N1 and N3) glycosylation products. They were deprotected and converted into 4-substituted imidazo[4,5-c]pyridine 2′-deoxy-β-D-ribonucleosides and 2′,3′-dideoxy-D-ribonucleosides. Compounds
3-deazapurine2'-deoxy-β-
D-核糖核苷和2',3'-deideoxy-
D-核糖核苷的聚合合成,包括3-deaza-2'-deoxyadenosine(1a)和3-deaza-2',描述了3'-二脱氧
腺苷(1b)。使源自5的4-
氯-1 H-
咪唑并[4,5-c]
吡啶基阴离子与2'-脱氧卤代糖6或2',3'-二脱氧卤代糖10反应,产生两个区域异构(N 1和N 3)糖基化产品。将它们脱保护并转化为4-取代的
咪唑并[4,5-c]
吡啶2′-脱氧-β-
D-核糖核苷和2′,3′-二脱氧-
D-核糖核苷。化合物1a和1b被证明比母体
嘌呤核苷对质子催化的N-糖基键
水解更稳定,并且不被
腺苷脱氨酶脱
氨基。