Ja. Secrist et al., SYNTHESIS AND BIOLOGIC EVALUATION OF 8-SUBSTITUTED DERIVATIVES OF NEBULARINE (9-BETA-D-RIBOFURANOSYLPURINE), Nucleosides & nucleotides, 13(5), 1994, pp. 1017-1029
A series of 8-substituted purine ribonucleosides were prepared from 2'
,3',5'-tri-O-acetyl-8-bromoadenosine and evaluated for cytotoxicity an
d antiviral activity. Four of these nucleosides (6b-9b) were significa
ntly toxic to both HEp-2 and L1210 cells in culture but the most cytot
oxic one (9b) was inactive against the P388 leukemia in mice. None of
these nucleosides showed significant antiviral activity against Herpes
Simplex 1 or 2, vaccinia, or influenza A.