Synthesis and Structural Elucidation of 2′-Deoxy-4′-thio-L-threo-pentofuranosylpyrimidine and -purine Nucleosides
作者:Jörn Wirsching、Jürgen Voss、Gunadi Adiwidjaja、Anja Giesler、Jürgen Kopf
DOI:10.1002/1099-0690(200103)2001:6<1077::aid-ejoc1077>3.0.co;2-0
日期:2001.3
(13) was used as glycosyl donor for the synthesis of 4′-thio-L-threo-pentofuranosyluracil derivatives 23−29. The corresponding cytidine analogue 33 was prepared from 13 via the triazolo derivative 31. Adenine and hypoxanthine did not react with 13. Therefore, 13 was transformed into the 1-O-acetate 15, which was a sufficiently reactive donor for the purine bases, yielding 4′-thio-L-threo-pentofuranosylpurines
苄基 3,5-di-O-benzyl-2-deoxy-1,4-dithio-L-threo-pentofuranoside (13) 用作糖基供体,用于合成 4'-thio-L-threo-pentofuranosyluracil 衍生物 23 -29。相应的胞苷类似物 33 由 13 通过三唑基衍生物 31 制备。腺嘌呤和次黄嘌呤不与 13 反应。因此,13 转化为 1-O-乙酸酯 15,它是嘌呤碱基的足够反应性供体,产生4'-硫代-L-苏式-戊呋喃基嘌呤 36 和 37。在大多数情况下,可以获得脱保护的核苷类似物的纯端基异构体,其中三个适用于 X 射线结构分析。