5'-[4-(Pivaloyloxy)-1,3,2-dioxaphosphorinan-2-yl]-2'-deoxy-5-fluorouridine: A Membrane-Permeating Prodrug of 5-Fluoro-2'-deoxyuridylic Acid (FdUMP)
作者:David Farquhar、Roger Chen、Saeed Khan
DOI:10.1021/jm00003a012
日期:1995.2
5'-[4-(Pivaloyloxy)-1,3,2-dioxaphosphorinan-2-yl]-2'-deoxy-5 -fluorouridine (1c) was designed as a potential membrane-permeable prodrug of 2'-deoxy-5-fluorouridine 5'-monophosphate (FdUMP), a putative active metabolite of the antitumor drug 5-fluorouracil (FU). It was anticipated that 1c would be hydrolyzed in vivo by carboxylate esterase (E.C. 3.1.1.1) to the labile 4-hydroxy analogue 2a, which should
将5'-[4-(新戊酰氧基)-1,3,2-二氧杂磷酰氨基-2-基] -2'-脱氧-5-氟尿苷(1c)设计为潜在的膜通透性2'-脱氧-5前药。 -氟尿苷5'-单磷酸盐(FdUMP),是抗肿瘤药物5-氟尿嘧啶(FU)的假定活性代谢产物。预期1c在体内会被羧酸酯酶(EC 3.1.1.1)水解为不稳定的4-羟基类似物2a,后者应通过被动扩散渗透细胞并向醛3a开环。然后从3a自发消除丙烯醛将生成游离核苷酸FdUMP。1c也可能直接穿透细胞,并在被细胞酯酶水解后经历相同的降解顺序。1c通过将2-羟基-2-氧代-4-(新戊酰氧基)-1,3,2-二氧杂磷烷基与2'缩合而制得 在三苯基膦和偶氮二羧酸二乙酯存在下的-deoxy-5-fluorouridine(FUdR)。1c在pH范围1-7.4(T1 / 2> 30 h)的水性缓冲液中中等稳定。然而,在羧酸酯酶的存在下,它以浓度依赖性方式降解为FdUMP。在