申请人:Lynx Therapeutics, Inc.
公开号:US05859233A1
公开(公告)日:1999-01-12
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'磷酰胺酰胺的方法,使用磷酰胺酰胺的胺交换反应,在该反应中,固相支持的寡核苷酸链的去保护的3'-氨基基团被交换为一个具有保护的3'-氨基基团的进入单体的5'-磷酰胺酰胺的氨基部分。然后,将得到的核苷酸间磷酰胺酰胺键氧化形成稳定的保护磷酰胺酰胺键。本发明的方法大大提高了产物收率,并减少了合成上述类化合物的当前可用方法所需的试剂用量。