A new approach for chemical phosphorylation of oligonucleotides at the 5′-terminus
作者:Andrei Guzaev、Harri Salo、Alex Azhayev、Harri Lönnberg
DOI:10.1016/0040-4020(95)00544-i
日期:1995.8
this step, the oligonucleotide may be easily separated from truncated impurities by RP HPLC. Successive detritylation and brief treatment with aqueous ammonia gave the oligonucleotide 5′-monophosphate. Alternatively, the yield of the last coupling may be quantified by detritylation of the oligonucleotide still anchored to the solid support. Usual deprotection then leads directly to the 5′-phosphorylated
描述了一种用于合成寡核苷酸的化学5'-磷酸化的新的有效方法。因此,3-(4,4'-二甲氧基三苯甲氧基)-2,2-二(乙氧羰基)丙基-1 N,N-二异丙基亚磷酰胺的2-氰乙基(1)是在常规链装配过程中作为5'-末端构件引入的。常规的氨解反应产生了用二甲氧基三苯甲基化的系链在5'-磷酸盐处保护的低聚物。在此步骤中,可通过RP HPLC轻松地将寡核苷酸与截短的杂质分离。连续去三苯甲基化并用氨水进行简短处理,得到寡核苷酸5'-单磷酸酯。或者,可以通过仍锚固在固体支持物上的寡核苷酸的去三苯甲基化来定量最后一次偶联的产率。然后通常的脱保护直接导致5'-磷酸化的低聚物。