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• W2083748405 abstract "As a part of our efforts to design prodrugs for antiviral nucleosides, 9-(beta-D-arabinofuranosyl)-6-azidopurine (6-AAP) was synthesized as a prodrug for ara-A that utilizes the azide reduction biotransformation pathway. 6-AAP was synthesized from ara-A via its 6-chloro analogue 4. The bioconversion of the prodrug was investigated in vitro and in vivo, and the pharmacokinetic parameters were determined. For in vitro studies, 6-AAP was incubated in mouse serum and liver and brain homogenates. The half-lives of 6-AAP in serum and liver and brain homogenates were 3.73, 4.90, and 7.29 h, respectively. 6-AAP was metabolized primarily in the liver homogenate microsomal fraction by the reduction of the azido moiety to the amine, yielding ara-A. However, 6-AAP was found to be stable to adenosine deaminase in a separate in vitro study. The in vivo metabolism and disposition of ara-A and 6-AAP were conducted in mice. When 6-AAP was administered by either oral or intravenous route,the half-life of ara-A was 7-14 times higher than for ara-A administered intravenously. Ara-A could not be found in the brain after the intravenous administration of ara-A. However, after 6-AAP administration (by either oral or intravenous route), significant levels of ara-A were found in the brain. The results of this study demonstrate that 6-AAP is converted to ara-A, potentially increasing the half-life and the brain delivery of ara-A. Further studies to utilize the azide reduction approach on other clinically useful agents containing an amino group are in progress in our laboratories." @default.
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• W2083748405 date "1996-01-01" @default.
• W2083748405 modified "2023-09-24" @default.
• W2083748405 title "Synthesis, Biotransformation, and Pharmacokinetic Studies of 9-(β-<scp>d</scp>-Arabinofuranosyl)-6-azidopurine: A Prodrug for Ara-A Designed To Utilize the Azide Reduction Pathway" @default.
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• W2083748405 doi "https://doi.org/10.1021/jm960339p" @default.
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