convenient synthesis of 3',5'-cyclic diguanylic acid via the modified H-phosphonate approach. The 1-(4-chlorophenyl)-4-ethoxypiperidin-4-yl (Cpep) group was used as protecting group for the 2'-hydroxy functions of ribonucleosides. Complete unblocking of the fully protected 3',5'-cyclic diguanylic acid gave cdiGMP as a homogeneous compound in an excellent yield.
                                    我们在此报告了通过修饰的H-
膦酸酯方法方便地合成3',5'-环二
鸟苷酸。将1-(4-
氯苯基)-
4-乙氧基哌啶-4-基(Cpep)基团用作
核糖核苷的2'-羟基官能团的保护基。完全保护的3',5'-环二
鸟苷酸完全解封,以极好的收率得到cdiGMP,为均相化合物。