Synthesis of novel C4-linked imidazole ribonucleoside phosphoramidites for probing general acid and base catalysis in ribozyme
作者:Lisa Araki、Shinya Harusawa、Maho Yamaguchi、Sumi Yonezawa、Natsumi Taniguchi、David M.J. Lilley、Zheng-yun Zhao、Takushi Kurihara
DOI:10.1016/j.tet.2005.09.063
日期:2005.12
We describe the synthesis of novel C4-linked imidazole ribonucleoside phosphoramidite (PA) 1a by which the imidazole moiety is incorporated into VS ribozyme to study its role in general acid and base catalysis. Investigation of protecting groups for the imidazole-N first indicated that pivaloyloxymethyl (POM) was adequate as an N-protecting group for the imidazole nucleoside, which could be readily
我们描述了新型C4连接的咪唑核糖核苷亚磷酰胺(PA)1a的合成,通过该合成,咪唑部分被掺入VS核酶中,以研究其在一般酸和碱催化中的作用。对咪唑-N保护基的研究首先表明,新戊酰氧基甲基(POM)作为咪唑核苷的N-保护基是足够的,在温和的碱性条件下可以很容易地将其除去。此外,合成方法扩展到2'-脱氧-和2'- O-烯丙基核苷PA 1b和1c的合成。