Conjugation of oligonucleotides via an electrophilic tether: N-chloroacetamidohexyl phosphoramidite reagent
摘要:
A novel method for the preparation of oligonucleotides conjugated with nucleophilic ligands is described. A new phosphoramidite building block derived from N-chloroacetyl-6-aminohexanol is attached at the 5'-terminus on the last step of oligonucleotide synthesis. Postsynthetic treatment of support-bound modified oligonucleotide with a variety of amines and mercaptans affords conjugates in high yield. (C) 1998 Elsevier Science ltd. All rights reserved.
Methods for the preparation of conjugated oligomers
申请人:ISIS Pharmaceuticals, Inc.
公开号:US06335437B1
公开(公告)日:2002-01-01
The present invention provides novel methods for preparing oligonucleotide conjugates using a novel electrophilic haloacetyl linker. Novel compounds and intermediates are also disclosed.
Efficient routes to DOTA-monoamide ligands bearing amino, hydroxyl, aldehyde and maleimido groups are described. These functional groups, which can be spaced at will from the coordination cage, will readily react with suitable groups of targeting moieties. Bioconjugates obtained in this way can be used for diagnostic imaging and therapeutic applications.