5′-Phosphonates of Ribonucleosides and 2′-Deoxyribonucleosides: Synthesis and Antiviral Activity
作者:Maxim Jasko、Alexander Shipitsin、Elena Shirokova、Alexander Krayevsky、Bruce Polsky、Penny Baron、Clarinda MacLow、Michael Ostrander、Brian O'Hara
DOI:10.1080/07328319308018558
日期:1993.9
5'-Phosphonates of natural 2'-deoxynucleosides and ribonucleosides were synthesized by condensation of 3'-O-acylated 2'-deoxynucleosides or 2',3'-substituted (2',3'-O-isopropylidene, 2',3'-O-methoxymethylene or 2',3'-O-ethoxymethylene) ribonucleosides. As condensing agents, either N,N'-dicyclohexylcarbodiimide or 2,4,6-triisopropylbenzenesulphonyl chloride were used. Nucleoside 5'-ethoxycarbonylphosphonates were converted into corresponding nucleoside 5'-aminocarbonylphosphonates by action of ammonia in methanol or aqueous ammonia. 5'-Hydrogenphosphonothioates of thymidine and 3'-deoxythymidine were obtained by reaction of phosphinic acid in the presence of pivaloyl chloride with 3'-O-acetylthymidine or 3'-deoxythymidine, respectively, followed by addition of powedered sulfur. 5'-O-methylenephosphonates of thymidine and 2'-deoxyadenosine were prepared by intramolecular reaction of corresponding 3'-O-iodomethylphosphonates under basic conditions. All compounds were tested for inhibition of several viruses, including HSV-2 and CMV, but showed no activity. A few compounds insignificantly inhibited HIV-1 reproduction. Thymidine 5'-hydrogenphosphonate neutralized anti-HIV action of 3'-azido-3'-deoxythymidine (AZT) and it indirectly showed that even some nucleoside 5'-phosphonates could be partly hydrolyzed in cell culture to corresponding nucleosides.