Bismethylene Triphosphate Nucleotides of Uridine 4-Phosphate Analogues: A New Class of Anionic Pyrimidine Nucleotide Analogues
作者:Scott D. Taylor、Farzad Mirzaei、Stephen L. Bearne
DOI:10.1021/jo702249j
日期:2008.2.1
Cytidine-5‘-triphosphate synthase (CTPS) catalyzes the formation of cytidine triphosphate (CTP) from glutamine, uridine 5‘-triphosphate (UTP), and adenosine 5‘-triphosphate (ATP). This reaction proceeds via formation of the high-energy intermediate UTP-4-phosphate (UTP-4-P). Stable analogues of UTP-4-P may be potent inhibitors of CTPS and useful as lead structures for the development of anticancer
胞嘧啶5'-三磷酸合酶(CTPS)催化由谷氨酰胺,尿苷5'-三磷酸(UTP)和腺苷5'-三磷酸(ATP)形成胞苷三磷酸(CTP)。该反应通过形成高能中间体UTP-4-磷酸盐(UTP-4-P)进行。UTP-4-P的稳定类似物可能是CTPS的有效抑制剂,可用作开发抗癌和抗病毒剂的先导结构。已经制备了尿苷4-磷酸酯(U-4-P)类似物的几个双亚甲基三磷酸酯(BMT)核苷酸。关键步骤是借助锡催化剂对2',3',5'-三-O-乙酰基或三-O的5'酯部分进行选择性甲醇分解-苯甲酰基U-4-P类似物。我们认为,这代表了在苯甲酰化核苷中选择性裂解5'苯甲酸酯的第一个通用方法。将这些5'-脱保护的U-4-P类似物与未对称的,受保护的BMT在末端位置之一上带有游离膦酸部分的Mitsunobu偶联,得到了完全保护的BMT-U-4-P类似物。使用TMSBr,然后用NH 4 OH-MeOH或NH 4 OH-吡啶处理