Highly chemo- and regioselective phosphitylation of unprotected 2′-deoxyribonucleosides
作者:Yukiko Kato、Natsuhisa Oka、Takeshi Wada
DOI:10.1016/j.tetlet.2006.02.060
日期:2006.4
regioselective phosphitylation of unprotected 2′-deoxyribonucleosides by the use of di-tert-butyl N,N-diethylphosphoramidite, a sterically hindered phosphoramidite. Both N/O- and primary hydroxy group-selectivities were simultaneously achieved, and the selectivity for the 5′-hydroxy groups was up to 97% regardless of the base moiety of the 2′-deoxyribonucleosides. The 3′-O-isomers and the 5′-O-isomers were easily
我们已经通过使用二叔丁基N,N-二乙基亚磷酰胺,一种位阻的亚磷酰胺,开发了未保护的2'-脱氧核糖核苷的化学和区域选择性磷酸化。同时实现N / O-和伯羟基选择性,并且无论2'-脱氧核糖核苷的碱基部分如何,对5'-羟基的选择性均高达97%。通过硅胶柱色谱法或结晶容易地分离3'-O-异构体和5'-O-异构体,以中等至良好的产率得到纯的2'-脱氧核糖核苷5'-亚磷酸酯。