was subjected to selective deamination of the 2-NH2 group resulting in compound 1. Also 2′,3′-dideoxyisoguanosine (2) was prepared employing the photo-substitution of the 2-substituent of 2-chloro-2′,3′-dideoxyadenosine (4). The latter was synthesized by Barton deoxygenation from 2-chloro-2′-deoxyadenosine (3) or via glycosylation of 2,6-dichloropurine (12) with the lactol 13. Compound 1 was less stable
2'- deoxyisoguanosine(1)用两步法从
2'-脱氧鸟苷(合成5)。甲
硅烷基化的
2'-脱氧鸟苷的胺化反应产生2-
氨基-
2'-脱氧腺苷(6),将其选择性脱
氨2-NH 2基,得到化合物1。另外2',3'-dideoxyisoguanosine(2)制备使用2-
氯2的2位取代基的光致取代',3'-二脱氧
腺苷(4)。后者通过2-
氯-
2'-脱氧腺苷的Barton脱氧反应(3)或通过2,6-二
氯嘌呤(12)与乳醇的糖基化反应合成。13。化合物1在N-糖基键上的稳定性不如
2'-脱氧鸟苷(5)。用
腺苷脱氨酶使双脱氧核苷2脱
氨基,得到2′,3′-二脱氧
黄嘌呤核苷(17)。