New Method for the Preparation of Some 2′- and 3′-Trifluoromethyl-2′,3′-dideoxyuridine Derivatives
作者:Pawel J Serafinowski、Catherine A Brown
DOI:10.1016/s0040-4020(99)01007-8
日期:2000.1
corresponding 2′- and 3′-difluoromethylene derivatives 3 and 11. Attempted removal of the 3′- and 2′-O-trimethylsilylethoxymethyl (SEM) groups from compounds 3 and 11, with tetrabutylammonium fluoride in tetrahydrofuran (THF), resulted in fluorination at the unsaturated difluoromethylene carbon with loss of the SEM group and formation of hitherto unreported 2′,3′-didehydro-2′,3′-dideoxy-5′-O-dimeth
5'-的反应ö二甲氧基三苯甲基-2'-氧代-3' - Ö -trimethylsilylethoxymethyluridine(2)和5'- Ô二甲氧基三苯甲基-3'-氧代-2' - ø -trimethylsilylethoxymethyluridine(10)中,用溴二[三(二甲氨基)]溴化phosph和锌得到相应的2'-和3'-二氟亚甲基衍生物3和11。试图从化合物3和11中除去3'-和2'- O-三甲基甲硅烷基乙氧基甲基(SEM)基团,与四丁基氟化铵的四氢呋喃(THF)中,在所述不饱和二氟亚甲基的碳导致氟化与SEM基团的损失和地层迄今未报告的2',3'-二脱氢-2',3'-二脱氧-5'-的ø -二甲氧基三苯甲基-2'-三氟甲基尿苷(5)和2',3'-二氢-2',3'-二脱氧-5'- O-二甲氧基三苯甲基-3'-三氟甲基尿苷(13)。的脱三苯甲基化5和13,得到2',3'-二脱氢-2',3'-二脱氧-2'(3')