The concept of spirocyclic restriction as applied broadly to the field of nucleoside mimics makes possible the generation of diastereomeric pairs configured with a syn- or anti-oriented hydroxyl substituent at C5′. The development of concise synthetic routes to spiro-fused nucleosides bearing all possible natural bases and expectedly capable of enforcing a conformation favourable for duplex formation on incorporation into oligomers represents a significant new direction in the design of antisense molecules. The present overview describes the convenient approaches that have been developed in this laboratory for accessing varied members of this class, including analogues that feature sulfur and carbon at the apical position.
将螺环限制的概念广泛应用于核苷模拟物领域,可以生成在 C5′处配置有同步或反方向羟基取代基的非对映异构对。开发带有所有可能天然碱基的螺状融合核苷的简明合成路线,预计能在加入低聚物时形成有利于双链形成的构象,是设计反义分子的一个重要新方向。本综述介绍了本实验室为获得该类核苷的各种成员而开发的便捷方法,包括在顶端位置具有硫和碳的类似物。