Thermolytic 4-Methylthio-1-butyl Group for Phosphate/Thiophosphate Protection in Solid-Phase Synthesis of DNA Oligonucleotides
作者:Jacek Cieślak、Andrzej Grajkowski、Victor Livengood、Serge L. Beaucage
DOI:10.1021/jo035861f
日期:2004.4.1
phosphate/thiophosphate protecting group for DNA oligonucleotides has been investigated for its potential application to a “heat-driven” process for either oligonucleotide synthesis on diagnostic microarrays or, oppositely, to the large-scale preparation of therapeutic oligonucleotides. The preparation of phosphoramidites 10a−d is straightforward, and the incorporation of these amidites into oligonucleotides via solid-phase
已经研究了用于DNA寡核苷酸的不耐热的4-甲基硫基-1-丁基磷酸酯/硫代磷酸酯保护基团,其在诊断芯片上合成寡核苷酸的“热驱动”过程中具有潜在的应用潜力,或者相反,在大规模制备寡核苷酸时具有潜在的应用价值。治疗性寡核苷酸。亚磷酰胺10a - d的制备这是很简单的,并且通过固相技术将这些亚酰胺掺入寡核苷酸的过程与使用2-氰基乙基脱氧核糖核苷亚磷酰胺所实现的过程一样有效。4-甲基硫基-1-丁基磷酸酯/硫代磷酸酯保护基的多功能性可通过在中性条件下于55°C在中性条件下于55°C的水性缓冲液中加热30分钟或在55°C的浓缩条件下2小时内从寡核苷酸中轻松去除而获得。 NH 4 OH。脱保护反应通过分子内环脱酯化机理发生,导致形成salt盐18。与脱氧核糖核苷和N混合时在近似于大规模(> 50 mmol)寡核苷酸脱保护反应的条件下,在保护的2'-脱氧核糖核苷或模型硫代磷酸酯二酯的作用下,盐18不会显着改