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Synthesis and evaluation of glucuronic acid derivatives as alkylating agents for the reversible masking of internucleoside groups of antisense oligonucleotides

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
303
Issue
1
Identifiers
DOI: 10.1016/s0008-6215(97)00147-x
Keywords
  • Glucuronic Acid
  • Oligodeoxynucleoside Phosphorothioate And Phosphorodithioate
  • Antisense
  • Prodrug
Disciplines
  • Biology

Abstract

Abstract 2-Iodoethyl (methyl α- d-glucopyranosid)uronate and 2-iodoethyl (methyl β- d-glucopyranosid)thiouronate were prepared in five steps by an efficient synthetic route starting from d-glucuronic acid. Both compounds were used to alkylate dithymidine phosphorothioate and phosphorodithioate diesters, leading to the corresponding phosphotriesters 12 to 15. Hydrolytic stability of 12–15 was studied in different biological media. The enzymatic hydrolysis of 12–15 was accompanied by another reaction resulting in formation of the dithymidine phosphodiesters. Several possible mechanisms for these reactions are proposed.

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