This invention provides highly regioselective and stereoselective processes for preparing synthetic nucleosides. A process for the preparation of synthetic nucleosides is provided that comprises a) preparing a bicycloamide derivative, b) reacting the bicycloamide derivative with a nucleic acid base or heterocyclic base or salt thereof in the presence of a transition metal catalyst to form a cyclopentenecarboxamide, and c) cleaving a carboxamide group from the cyclopentenecarboxamide to form the synthetic nucleoside. The processes according to the invention can be used for the synthesis of a variety of anti-viral agents, including Abacavir, Carbovir, and Entecavir, as well as derivatives thereof.
这项发明提供了用于制备合成核苷的高度区域选择性和立体选择性的过程。提供了一种用于制备合成核苷的过程,包括a)制备双环酰胺衍
生物,b)将双环酰胺衍
生物与核酸碱基或杂环碱基或其盐在过渡
金属催化剂存在下反应,形成
环戊烯羧酰胺,c)从
环戊烯羧酰胺中裂解羧酰胺基团以形成合成核苷。根据该发明的过程可用于合成各种抗病毒药物,包括
阿巴卡韦、卡波韦和
恩替卡韦,以及其衍
生物。