Anti-virally active carbanucleosides such as entecavir are prepared by a process which utilizes, throughout the synthesis, an aromatic protectant group for the hydroxyl and the alkyl hydroxy groups of the starting material, removed as the final step of a multi-step synthesis. Such protectant groups yield intermediates which are solid and therefore easily purified at various stages of the process, for an economical and relatively fast process for synthesizing the final product.
抗病毒活性的卡巴核苷类似
恩替卡韦等,是通过一种过程制备的,该过程在合成过程中利用芳香保护基保护起始物质的羟基和烷基羟基,最后一步将其去除。这样的保护基产生的中间体是固体,因此在过程的各个阶段很容易纯化,从而实现了制备最终产品的经济和相对快速的过程。