作者:Narender Pottabathini、Suyeal Bae、Padmanava Pradhan、Hoh-Gyu Hahn、Heduck Mah、Mahesh K. Lakshman
DOI:10.1021/jo050847j
日期:2005.9.1
commercially available 2‘-deoxyguanosine. The present method leading to the chloro nucleoside is operationally simpler compared to previously reported glycosylation techniques where isomeric products were obtained. Both electrophilic nucleosides can be used for the preparation of N-substituted 2‘-deoxyguanosine analogues via displacement of the leaving groups, and a comparison of their reactivities shows the chloro
2-氯和2-甲苯磺酰氧基-2'-脱氧肌苷作为他们的方便合成叔描述了丁基丁基二甲基甲硅烷基醚。两种化合物均可通过常规途径合成,并依赖于可商购的2'-脱氧鸟苷。与先前报道的获得异构体产物的糖基化技术相比,导致氯代核苷的本发明方法在操作上更简单。两种亲核核苷均可用于通过离去基团的置换来制备N-取代的2'-脱氧鸟苷类似物,其反应性的比较表明,氯类似物具有优越性。有趣的是,Pd催化剂介导的两步一锅法将烯丙基保护的氯核苷中间体转化为最终的修饰2'-脱氧鸟苷衍生物也是可行的。根据这些观察,对Pd催化的芳基胺化反应以及C-C交叉偶联的初步评估也已经用氯代和对甲苯氧基核苷底物进行了。结果表明2-氯-2'-脱氧肌苷的潜在高合成效用,并且在许多情况下,该衍生物可以取代制备起来较麻烦或不易获得的溴和氟类似物。