between 19 and difluoro-H-phosphinothioate 9 under basic conditions smoothly delivers the expected bisfuranosyl derivatives 20 featuring a fluorinated phosphinothioyl link, which are functionally modified to allow the insertion of the second nucleobase. Introduction of the second nucleobase to convert 16 into 13 highlights the involvement of a hitherto unreported competitive trans-N-glycosylation process
报道了 6'-
碘核苷19的有效合成。在碱性条件下, 19和二
氟-H-
硫代
膦酸9之间的偶联反应顺利地产生了预期的双
呋喃糖基衍
生物20 ,该衍
生物具有
氟化的
硫代膦酰基键,其经过功能修饰以允许插入第二个核碱基。将16转化为13的第二个核碱基的引入突出了在经典 Vorbrüggen 条件下迄今为止未报道的竞争性反式-N-糖基化过程的参与。