An original and efficient stereocontrolled synthesis of ribonucleosidic homo- and heterodimers has been achieved from inexpensive d-xylose. This successful strategy involved the sequential introduction of nucleobases, using two stereocontrolled N-glycosidation reactions, from a common two-furanoside amide-linked scaffold offering the possibility of obtaining any given base sequence. The pertinence
从便宜的d-
木糖已经实现了
核糖核苷酸同二聚体和异二聚体的原始和有效的立体控制合成。这种成功的策略涉及使用两个立体控制的N-糖苷化反应从常见的两个
呋喃糖苷酰胺连接的支架上顺序引入核苷碱基,从而有可能获得任何给定的碱基序列。该方法的相关性通过分18步制备均二聚体UU- 34和
TT- 35进行了说明,从d-
木糖中获得的优良总收率超过10%,而异二聚体途径在19步中产生了UT- 39。总产量约为10%。