Oligonucleotide synthesis by the use of a 2-(levulinyloxymethyl)-5-nitrobenzoyl group as the novel base-labile protecting Group for the 5′-hydroxyl groups of ribonucleoside and 2′-deoxyribonucleoside 3′-phosphoramidites
作者:Kazuo Kamaike、Hiroaki Takahashi、Takashi Kakinuma、Kimio Morohoshi、Yoshiharu Ishido
DOI:10.1016/s0040-4039(97)01617-1
日期:1997.9
A novel 2-(levulinyloxymethyl)-5-nitrobenzoyl (LMNBz) protecting group for the 5′ position of nucleoside 3′-phosphoramidites was successfully applied to the solid-phase synthesis of both an oligodeoxyribonucleotide (TpTpT and TpTpTpT) and an octaribonucleotide in combination with a 2′-O-Thp protecting group (UpCpApGpUpUpGpG). The LMNBz group was simply unmasked due to its base-labile property by a
一种新型的2-(乙酰丙酰氧基甲基)-5-硝基苯甲酰基(LMNBz)核苷3'-亚磷酰胺的5'位保护基团已成功地用于寡脱氧核糖核苷酸(TpTpT和TpTpTpTT)和八核糖核苷酸的固相合成带有2'- O -Thp保护基(UpCpApGpUpUpGpG)。LMNBz基团由于其对碱不稳定的特性而通过两步程序(即先用0.5 M的水合肼在1:4的乙酸-吡啶中处理,然后再用0.5 M的咪唑的乙腈处理)简单地将其掩盖。