Inter alia, a process for the production of a nucleoside phosphorothioate derivative corresponding to the following general formula (I): ##STR1## characterized in that it comprises reacting a salt of a nucleoside H-phosphonate corresponding to the following general formula (II): ##STR2## with a thiol transfer agent corresponding to the following general formula (III): R.sup.2 --S--X (III) in the presence of a silylating agent and a base in a suitable solvent; and working-up the reaction mixture to isolate the desired product and change the counter-cation as desired; wherein M.sup.+ represents a suitable counter-cation; R.sup.1 represents an appropriate nucleoside or nucleoside analogue; R.sup.2 represents a desired protecting group, which may ultimately be removable by cleavage of its bond to the sulfur atom; and X represents a leaving group, is disclosed.
其中,揭示了一种制备与下列通式(I)相对应的核苷酸
磷酸硫酯衍
生物的过程:##STR1## 其特征在于,在适当的溶剂中,在
硅化试剂和碱的存在下,将下列通式(II)所对应的核苷酸H-
膦酸盐与下列通式(III)所对应的
硫醇转移试剂反应,并处理反应混合物以分离所需的产物并根据需要更改计数器阳离子;其中M.sup.+代表适当的计数器阳离子;R.sup.1代表适当的核苷酸或核苷酸类似物;R.sup.2代表所需的保护基,最终可以通过断裂与
硫原子的键而去除;X代表离去基团。