The invention provides a method of synthesizing oligonucleotide N3'.fwdarw.P5' phosphoramidates using an amine-exchange reaction of phosphoramidites in which a deprotected 3'-amino group of a solid phase supported oligonucleotide chain is exhanged for the amino portion of a 5'-phosphoramidite of an incoming monomer which has a protected 3'-amino group. The resulting internucleotide phosphoramidite linkage is then oxidized to form a stable protected phosphoramidate linkage. The method of the invention greatly improves product yields and reduces reagent usage over currently available methods for synthesizing the above class of compound.
本发明提供了一种合成寡核苷酸N3'.fwdarw.P5'
磷酰胺酯的方法,使用
磷酰胺酯的胺交换反应,在该反应中,固相支持的寡核苷酸链的去保护3'-
氨基基团被交换为一个具有受保护的3'-
氨基基团的进入单体的5'-
磷酰胺酯的
氨基部分。然后,将产生的核苷间
磷酰胺酯酯键氧化,形成稳定的受保护
磷酰胺酯酯键。本发明的方法大大提高了产物收率,并减少了目前可用于合成上述类化合物的方法中的试剂使用。