Diethylaminosulfur trifluoride (DAST) as a fluorinating agent of pyrimidine nucleosides having a 2',3'-vicinal diol system.
作者:Hiroyuki HAYAKAWA、Fumi TAKAI、Hiromichi TANAKA、Tadashi MIYASAKA、Kentaro YAMAGUCHI
DOI:10.1248/cpb.38.1136
日期:——
Displacement of a hydroxyl group in pyrimidine nucleosides having a vicinal diol system by a fluorine atom was investigated by using diethylaminosulfur trifluoride (DAST). Though participation of the base moiety often thwarts the desired introduction of a fluorine atom, it was found that appropriate modification of the base and/or sugar moieties allowed the desired fluorodehydroxylation to occur, giving 5'-, 3'-β-, and 2'-α-fluorinated uracilnucleosides in good yields.
通过使用二乙基三氟化硫(DAST),研究了用氟原子置换具有邻位二醇体系的嘧啶核苷中的羟基的问题。虽然碱基的参与往往会阻碍氟原子的引入,但研究发现,对碱基和/或糖基进行适当的修饰可以实现所需的氟脱羟基反应,从而以良好的收率得到 5'-、3'-β 和 2'-α 氟化尿嘧啶核苷。