2', 3', 5'-Trichloro-2', 3', 5'-trideoxy-2', 3'-secouridines (2a, b) were synthesized from uridine or 5-fluorouridine by a combination of sodium metaperiodate oxidation, sodium borohydride reduction, and chlorination with Vilsmeier-Haack reagent. Reaction of 2a, b with base gave some new pyrimidine acyclonucleosides (3-5) and (uracil-l-yl)-1, 4-dioxanes (8, 9). The preparation of 5'-chloro-5'-deoxy-2', 3'-secouridine (11) from 5'-chloro-5'-deoxyuridine (10) and its conversion into (uracil-l-yl)-1, 4-dioxane 12 and 5'-deoxy-2', 3'-secouridine (13) are also described.
2', 3', 5'-Trichloro-2', 3', 5'-trideoxy-2', 3'-secouridines(2a, b)是由
尿苷或
5-氟尿苷通过偏
碘酸钠氧化、
硼氢化钠还原和 Vilsmeier-Haack 试剂
氯化组合合成的。将 2a 和 b 与碱反应,可得到一些新的
嘧啶无环核苷(3-5)和(尿
嘧啶-l-基)-1,4-二氧杂环(8,9)。此外,还介绍了由 5'-chloro-5'-deoxyuridine (10) 制备 5'-chloro-5'-deoxy-2', 3'-secouridine (11) 以及将其转化为 (尿
嘧啶-l-基)-1, 4-二氧杂环12 和 5'-deoxy-2', 3'-secouridine (13)的方法。