Synthesis of 3,6-anhydro sugars from cyclic sulfites and sulfates and their applications in the preparation of bicyclonucleoside analogues of ddC and ddA
作者:M.Pineda Molas、M.Isabel Matheu、Sergio Castillón、Joaquín Isac-García、Fernando Hernández-Mateo、Francisco G. Calvo-Flores、Francisco Santoyo-González
DOI:10.1016/s0040-4020(99)00911-4
日期:1999.12
Cyclic sulfates 21–23 and sulfite 27 derived from glucofuranose lead to the 3,6-anhydrosugar 28 in excellent yields when treated with sodium sulfite or in basic media. When treated with sodium sulfite, the 3-deoxy derivative 24 fails to give the intramolecular cyclization which leads to the anhydrosugars. Instead it gives the disulfonate derivative 26. 28 was used as starting material to prepare bicyclonucleosides
当用亚硫酸钠或在碱性介质中处理时,衍生自葡糖呋喃糖的环状硫酸盐21 – 23和亚硫酸盐27以极高的产率生成3,6-脱水糖28。当用亚硫酸钠处理时,3-脱氧衍生物24不能产生分子内环化作用,从而导致脱水糖。相反,它给出二磺酸盐衍生物26。使用28作为起始原料制备双环核苷43和46,它们是抗HIV药物ddC和ddA的类似物。