Process for the synthesis of 2' -O-substituted pyrimidines and oligomeric compounds therefrom
申请人:ISIS Pharmaceuticals, Inc.
公开号:US20030050454A1
公开(公告)日:2003-03-13
oligonucleotide analogs are disclosed having pyrimidine monomeric sub-units therein that are modified at the 2′ and 5′ positions. Monomeric sub-units having these modifications may be further modified at the 2′ position. Improved processes for the synthesis of 2′-O-substituted pyrimidine nucleosides are also provided. The processes feature alkylation of a 2,2′-anhydropyrimidine nucleoside or a 2S,2′-anhydropyrimidine nucleoside with a weak nucleophile in the presence of a Lewis acid.
本文披露了含有嘧啶单体亚基的寡核苷酸类似物,其在2'和5'位置进行了修饰。具有这些修饰的单体亚基可以进一步在2'位置进行修饰。还提供了改进的2'-O-取代嘧啶核苷合成过程。该过程采用弱亲核试剂在Lewis酸存在下与2,2'-脱水嘧啶核苷或2S,2'-脱水嘧啶核苷烷基化的方法。