An alternative approach towards the synthesis of (3′→5′) methylene acetal linked dinucleosides
作者:P.J.L.M. Quaedflieg、C.M. Timmers、V.E. Kal、G.A. van der Marel、E. Kuyl-Yeheskiely、J.H. van Boom
DOI:10.1016/s0040-4039(00)79605-5
日期:1992.5
appropriately protected thymidine, d-cytidine or d-guanosine acceptors 5a–c, using trimethylsilyl trifluoromethanesulfonate (TMSOTf) as the activating system, furnished the respective (3′→5′) methylene acetal linked dimers d(T∧T), d(T∧G). Similarly, TMSOtf-promoted condensation of (5′-O,4-N)dibenzoyl-3′-O-acetyloxymethyl-2′-deoxycytidine with acceptors 5a–c yielded the corresponding d(C∧T), d(C∧C)
使用三甲基甲硅烷基三氟甲磺酸酯(5a-c)将5'-O-乙酰丙酰基-3'-O-苯甲酰氧基甲基胸苷或5'-O-苯甲酰基-3'-O-乙酰氧基甲基胸苷与适当保护的胸苷,d-胞苷或d-鸟苷受体5a–c缩合( TMSOTf)作为活化系统,提供了各自的(3'→5')亚甲基缩醛连接的二聚体d(T∧T),d(T∧G)。同样,TMSOtf促进的(5'-O,4-N)二苯甲酰基-3'-O-乙酰氧基甲基-2'-脱氧胞苷与受体5a–c的缩合产生相应的d(C∧T),d(C∧C )和d(C∧G)二聚体。