N6-Benzoyl-9-(2'-deoxy-5'-O-DMT-2'-fluoro-b-D-arabinofuranosyl)adenine 3'-CE-phosphoramidite is an antiviral agent that inhibits the replication of DNA.
Reference Reading
1. Synthesis of some purine and pyrimidine nucleosides of 3-amino-2,3,6-trideoxy-L-lyxo-hexopyranose (daunosamine)
E Lazzari, A Vigevani, F Arcamone. Carbohydr Res. 1977 Jun;56(1):35-42. doi: 10.1016/s0008-6215(00)84234-2.
The daunosaminyl analogue of the antibiotic puromycin and the nucleoside derivatives of daunosamine with adenine, thymine, and cytosine have been synthesised. The nucleoside derivatives of 6-dimethylaminopurine, thymine, and cytosine were prepared by melting the protected daunosamine with the protected base in vacuo. Daunosaminyladenine was obtained by condensing N-trifluoroacetyl-O-trifluoroacetyl-alpha-daunosaminyl chloride either with N6-benzoyl-9-chloromercuryadenine in boiling xylene or with N6-benzoyladenine in dichloromethane at room temperature in the presence of a molecular sieve. In each reaction, the beta-anomeric nucleoside was obtained, as shown by p.m.r. data. The protecting groups were removed with barium hydroxide or methanolic ammonia to give the free aminonucleosides in good yield. 9-beta-Daunosaminyl-6-dimethylaminopurine was coupled to N-benzylocyxcarbonyl-O-methyltyrosine, giving, after hydrogenolysis, the daunosaminyl analogue of puromycin.
2. An approach to the total synthesis of sinefungin
G A Mock, J G Moffatt. Nucleic Acids Res. 1982 Oct 25;10(20):6223-34. doi: 10.1093/nar/10.20.6223.
Condensation of N6-benzoyl-2',3'-O-isopropylideneadenosine-5'-aldehyde with nitromethane followed by acid catalyzed acetylation and borohydride reduction leads to N6-benzoyl-9-(5,6-dideoxy-2,3-O-isopropylidene-6-nitro-beta-D-ribo-hexofuranosyl)adenine (4). A second nitroaldol condensation between 4 and N-benzyloxycarbonly-L-aspartic acid-beta-semialdehyde alpha-benzyl ester (5) followed by acetylation and borohydride reduction leads to a fully protected 6'-nitro modification of sinefungin and its C6'-epimer (7). Hydrolysis of the acetonide followed by sequential reduction of the benzyl derived protecting groups and the nitro group and debenzoylation leads to a modest yield of a 3: 1 mixture of sinefungin (1) and 6'-episinefungin which can only be separated by analytical ion exchange chromatography.