Regioselective protection of the 2′-hydroxyl group of N-acyl-3′,5′-O-di(t-butyl)silanediylnucleoside derivatives by use of t-BuMgCl and 2-(trimethylsilyl)ethoxymethyl chloride
作者:Takeshi Wada、Masanori Tobe、Takashi Nagayama、Kiyotaka Furusawa、Mitsuo Sekine
DOI:10.1016/0040-4039(95)00130-5
日期:1995.3
Regioselective 2′-O-protection of N-protected 3′,5′-O-di(t-butyl)silanediylribonucleoside derivatives with the 2-(trimethylsilyl)ethoxymethyl (SEM) group has been achieved by use of t-BuMgCl and 2-(trimethylsilyl)ethoxymethyl chloride. The former was used as a base. The 2′-O-SEM protected ribonucleoside derivatives were converted via a three-step reaction into the corresponding phosphoramidite building
通过使用t -BuMgCl和2实现了N保护的3',5'- O-二(叔丁基)硅烷二基核糖核苷衍生物具有2-(三甲基甲硅烷基)乙氧基甲基(SEM)基团的区域选择性2'- O-保护。-(三甲基甲硅烷基)乙氧基甲基氯。前者被用作基础。通过三步反应将2'- O- SEM保护的核糖核苷衍生物以良好的总收率转化为相应的亚磷酰胺结构单元。