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The importance of the 4'-hydroxyl hydrogen for the anti-trypanosomal and antiviral properties of (+)-5'-noraristeromycin and two 7-deaza analogues

By K L Seley, S W Schneller, Erik De Clercq, D Rattendi, S Lane, C J Bacchi and B Korba


(+)-5'-Noraristeromycin (1) has shown significant antiviral activity while its 7-deaza analogue 2 is an antitrypanosomal candidate. To determine the relevance of the 4'-hydroxyl hydrogen in these activities, a derivative of 1 (that is, 3) where the C-4' hydroxyl hydrogen has been replaced by a methyl group has been prepared beginning with palladium (0) mediated coupling of the sodium salt of N6-benzoyladenine (9) and (1S,4R)-4-methoxy-2-cyclopenten-1-yl acetate (5). The synthesis of compound 5 is described from (1S,4R)-1-[(tert-butyldimethylsilyl)oxy]-4-hydroxycyclopent-2-ene (6) in three steps. Analogous preparations of the 7-deaza and 8-aza-7-deaza derivatives of 3 related to 2 (that is, 4 and 12) are also reported. The new derivatives (3, 4, and 12) failed to show improved antiviral activity. Compound 12 was the only derivative with some anti-trypanosomal activity, giving 40% inhibition of growth at 100 microM against bloodstream forms of a Typanosoma brucei brucei isolate in a standard in vitro screen. This study indicated that the C-4'-hydroxyl hydrogen plays a role in the medicinal properties of 1 and 2.status: publishe

Topics: Adenosine, Animals, Antiviral Agents, Cell Line, Transformed, Hepatitis B virus, Humans, Pyrazoles, Pyridines, Structure-Activity Relationship, Trypanocidal Agents, Trypanosoma brucei brucei
Publisher: Pergamon
Year: 1998
DOI identifier: 10.1016/s0968-0896(98)00036-4
OAI identifier:
Provided by: Lirias
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