Regioselective protection of carbohydrate derivatives.
作者:Shigeyoshi Nishino、Hatsuko Takamura、Yoshiharu Ishido
DOI:10.1016/s0040-4020(01)87616-x
日期:1986.1
A simple treatment of fully aroylated purine and pyrimidine ribo-nucleosides with pulverized potassium tert-butoxide in tetrahydrofuran (THF) or dichloromethane under a controlled condition gave a mixture of the corresponding di-O-aroyl derivatives in which 2'-OH derivatives are preponderant over 3'-OH derivatives; 3',5'-di-O-benzoyluridine, N4, 3', 5'-tribenzoylcytidine, N4, 3', 5'-tri-o-toluoylcytidine
在控制条件下,在四氢呋喃(THF)或二氯甲烷中,用粉碎的叔丁醇钾简单地处理完全芳基化的嘌呤和嘧啶核糖核苷,得到相应的二-O-芳酰基衍生物的混合物,其中2'-OH衍生物占优势超过3'-OH衍生物;3' ,5'-二-O- benzoyluridine,N 4,3' ,5'-tribenzoylcytidine,N 4,3' ,5'-三-邻- toluoylcytidine,N 2,3' ,5'-tribenzoylguanosine,和获得N 2-异丁酰基-3',5'-二-O-苯甲酰基鸟苷结晶,产率分别为80%,78%,72%,67%和65%。