申请人:KING'S COLLEGE LONDON
公开号:EP0723973A1
公开(公告)日:1996-07-31
Inter alia, a process for the production of a nucleoside phosphorothioate derivative corresponding to the following general formula (I):
characterised in that it comprises reacting a salt of a nucleoside H-phosphonate corresponding to the following general formula (II):
with a thiol transfer agent corresponding to the following general formula (III):
R2-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+ represents a suitable counter-cation;
R1 represents an appropriate nucleoside or nucleoside analogue;
R2 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.
除其他外,一种生产对应于以下通式(I)的硫代磷酸核苷衍生物的工艺:
其特征在于,该工艺包括使对应于下通式(II)的核苷 H-膦酸盐反应:
与对应于下式通式(III)的硫醇转移剂反应:
R2-S-X (III)
在合适的溶剂中,在硅烷化剂和碱的存在下;并对反应混合物进行加工,以分离出所需的产物,并根据需要改变反阳离子;其中
M+ 代表合适的反阳离子;
R1 代表适当的核苷或核苷类似物;
R2 代表所需的保护基团,该保护基团最终可通过裂解其与硫原子的键而去除;
以及
X 代表离去基团、
已公开。