Oligoribonucleotide synthesis by the use of 1-(2-cyanoethoxy)ethyl (CEE) as a 2′-hydroxy protecting group
作者:Tadashi Umemoto、Takeshi Wada
DOI:10.1016/j.tetlet.2004.10.151
日期:2004.12
A novel method for the synthesis of oligoribonucleotides using 1-(2-cyanoethoxy)ethyl (CEE) as a 2′-hydroxy protecting group has been developed. A CEE group was introduced to the 2′-position of N-acyl-3′,5′-O-silyl-protected ribonucleosides under acidic conditions in good yields. The 2′-O-CEE group was found to be stable in an aqueous or ethanolic ammonia and was quickly removed by treatment with anhydrous
开发了一种新的合成寡核糖核苷酸的新方法,该方法使用1-(2-氰基乙氧基)乙基(CEE)作为2'-羟基保护基。在酸性条件下,以良好的产率将CEE基团引入到N-酰基-3',5'- O-甲硅烷基保护的核糖核苷的2'-位置。发现2'- O- CEE基团在含水氨或乙醇氨中是稳定的,并通过用无水四丁基氟化铵(TBAF)处理而被快速除去。通过结合使用N-酰基和2'- O -CEE保护基,可以可靠且完全的两步脱保护,首先是在NH 3 -EtOH中,然后是在THF中的TBAF,而无需裂解核苷酸间键。