作者:Tilak Chandra、Kenneth L. Brown
DOI:10.1080/15257770601052216
日期:2007.1
A series of 2 ',3 '-isopropylidene and 5 '-trityl-protected alpha-indole and alpha/beta-benzimidazole and imidazole ribonucleosides were deprotected with different acids. Selectivity was achieved for 5 '-versus 2 ',3 '- deprotection by using formic acid in the alpha-indole ribonucleoside series. Treatment of alpha-indole ribonucleosides with a mixture of formic acid and ether at room temperature afforded
一系列2',3'-异丙叉和5'-三苯甲基保护的α-吲哚和α/β-苯并咪唑和咪唑核糖核苷用不同的酸脱保护。通过使用α-吲哚核糖核苷系列中的甲酸,实现了5'-2',3'-脱保护的选择性。在室温下用甲酸和乙醚的混合物处理α-吲哚核糖核苷得到2',3'-去保护的α-核糖核苷,而用相同的酸处理α-苯并咪唑核糖核苷得到5'-去保护的核糖核苷,而没有任何2',3'脱保护的产品。这些核糖核苷的结构已通过2D(NOESY,COSY和HMQC)NMR光谱进行了阐明。