Synthesis, structure, and biological evaluation of C-2 sulfonamido pyrimidine nucleosides
作者:Irena Krizmanić、Aleksandar Višnjevac、Marija Luić、Ljubica Glavaš-Obrovac、Mladen Žinić、Biserka Žinić
DOI:10.1016/s0040-4020(03)00589-1
日期:2003.6
The C-2 sulfonamido pyrimidine nucleosides were prepared by opening the 2,2′- or 2,3′-bond in anhydronucleosides under nucleophilic attack of sulfonamide anions. Reaction of the sodium salt of p-toluenesulfonamide or 2-(aminosulfonyl)-N,N-dimethylnicotinamide with 2,2′-anhydro-1-(β-d-arabinofuranosyl)cytosine gave the C-2 sulfonamido derivatives in excellent yields. Ring opening of the less reactive
通过在磺酰胺阴离子的亲核攻击下在脱水核苷中打开2,2'-或2,3'-键来制备C-2磺酰胺基嘧啶核苷。对甲苯磺酰胺或2-(氨基磺酰基)-N,N-二甲基烟酰胺的钠盐与2,2'-脱水-1-(β-d-阿拉伯呋喃糖基)胞嘧啶的反应以优异的产率得到C-2磺酰胺基衍生物。较低反应性的2,2'-脱水尿苷和2,3'-脱水胸苷的开环可以通过对甲苯磺酰胺的DBU / CH 3 CN活化来完成,从而得到适量的C-2磺酰胺基衍生物。乙酸或ZnBr 2 / CH 2 Cl 2对5-甲基-N 2-甲苯磺酰基-1-(2-脱氧-5- O-三苯甲基-β-d-苏-戊呋喃糖基)异胞嘧啶导致保护基和核苷键均裂解,产生5-甲基-N 2-甲苯磺酰基异胞嘧啶作为主要产品。通过1D和2D NMR实验以及4-亚氨基-N 2-甲苯磺酰基氨基-1-(β-d-阿拉伯呋喃糖基)嘧啶的X射线结构分析证实了所制备的C-2磺酰胺基核苷的结构。两种方法均证