A Short, Efficient Synthesis of 2′-Deoxypseudoisocytidine Based on Heck-Chemistry
摘要:
A novel synthesis of 2'-deoxypseudoisocytidine as well as of its phosphoramidite building block for oligonucleotide synthesis is presented. The synthesis is based on Heck-coupling between N-protected pseudoisocytosine and a silyl protected furanoid glycal. With this procedure the corresponding phosphoramidite building block is obtained in 5 steps and an overall yield of 28%.
Synthesis and triplex forming properties of pyrrolidino pseudoisocytidine containing oligodeoxynucleotides
摘要:
吡咯烷假C-核苷是天然脱氧核苷的电子等排体,其在生理条件下在吡咯烷环氮处质子化。作为形成三链体的寡脱氧核苷酸 (TFO) 的组成部分,正电荷有望通过与目标 DNA 的磷酸二酯主链的静电相互作用来稳定 DNA 三螺旋。我们描述了吡咯烷异胞苷假核苷和相应的亚磷酰胺结构单元的合成以及将其掺入 TFO 中。与未修饰的寡脱氧核苷酸相比,此类 TFO 显示出显着增加的 DNA 亲和力。亲和力的增加被证明是由于吡咯烷亚基上的正电荷。