In this study we synthesized a series of thymine and 5-ethyluracil acyclic nucleoside phosphonates bearing hydroxymethyl, methoxymethyl, azidomethyl, aminomethyl and (trimethylammonio)methyl group in side chain as potent inhibitors of thymidine phosphorylase. In addition, we investigated in particular the novel syntheses of fluorinated derivatives containing fluoromethyl or trifluoromethyl groups in side chain such as 5-ethyl- 1-[(S)-3-fluoro-2-(phosphonomethoxy)propyl]uracil (8) or 5-ethyl-1-[3,3,3-trifluoro-2-(phosphonomethoxy)propyl]uracil and thymine derivatives 27 and 28. Uracil acyclic nucleoside phosphonates 1-2-[(diisopropoxyphosphoryl)methoxy]ethyl}uracil (12) and 1-2-[(diisopropoxyphosphoryl)methoxy]-3,3,3-trifluoropropyl}uracil (19) were fluorinated to corresponding 5-fluorouracil derivatives. While the 5-fluorouracil derivatives exhibit a marginal inhibitory effect, thymine and 5-ethyluracil compound with fluorine in side chains possess considerable inhibitory potency toward thymidine phosphorylase from rat spontaneous T-cell lymphoma.
在这项研究中,我们合成了一系列嘧啶和5-乙基尿嘧啶无环核苷酸磷酸酯,其侧链带有羟甲基、甲氧基甲基、叠氮甲基、氨基甲基和(三甲基铵)甲基基团,作为胸苷磷酸酶的有效抑制剂。此外,我们特别研究了含氟衍生物的新合成,侧链含有氟甲基或三氟甲基基团,如5-乙基-1-[(S)-3-氟-2-(磷酸甲氧基)丙基]尿嘧啶(8)或5-乙基-1-[3,3,3-三氟-2-(磷酸甲氧基)丙基]尿嘧啶以及嘧啶衍生物27和28。尿嘧啶无环核苷酸磷酸酯1-2-[(二异丙氧基磷酰基)甲氧基]乙基}尿嘧啶(12)和1-2-[(二异丙氧基磷酰基)甲氧基]-3,3,3-三氟丙基}尿嘧啶(19)被氟化为相应的5-氟尿嘧啶衍生物。虽然5-氟尿嘧啶衍生物表现出边缘的抑制作用,但侧链含氟的嘧啶和5-乙基尿嘧啶化合物对来自大鼠自发性T细胞淋巴瘤的胸苷磷酸酶具有相当的抑制活性。