Facile fluorination of deoxy-4′-thiopyrimidine nucleosides with “down” hydroxyl groups. Retention of configuration after fluoride opening of the quaternized N3-MEM anhydronucleosides
作者:Lak S. Jeong、Marc C. Nicklaus、Cliff George、Victor E. Marquez
DOI:10.1016/s0040-4039(00)78346-8
日期:1994.10
diethylaminosulfur trifluoride (DAST) produced very reactive N3- MEM-O2,2- and N3-MEM-O2,3-anhydronucleoside intermediates (16) that reacted with KF to give the desired fluorinated nucleosides with retention of configuration.
尝试氟化1-(5 - O-三苯甲基-3-脱氧-4-硫代-β-D-赤型-戊呋喃糖基)-3-(2-甲氧基乙氧基甲基)尿嘧啶(12)和1-(5- O-三苯甲基- 2-脱氧-4-硫代-β-β-D-赤式-pentofuranosyl)-3-(2-甲氧基乙氧基甲基)尿嘧啶(14)与三氟化二乙氨基硫(DAST)产生的反应性非常ñ 3 - MEM- Ô 2,2-和ñ 3 -MEM- Ò 2,3-脱水核苷中间体(16),其与KF反应与构型的保持,得到所需的氟化核苷。