Synthesis and Anti-HIV Activity of Further Examples of 1-[3-Deoxy-3-(N-hydroxyamino)-β-d-threo-(and β-d-erythro)-pentofuranosyl]thymine Derivatives¹

Jean M. J. Tronchet Department of Pharmaceutical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Martina Zsély Department of Pharmaceutical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Olivier Lassout Department of Pharmaceutical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Françoise Barbalat-Rey Department of Pharmaceutical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Istvan Komaromi Department of Pharmaceutical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Michel Geoffroy Department of Physical Chemistry, Faculty of Sciences, University of Geneva, 1211, Geneva, 4, Switzerland

Abstract

Upon sodium cyanoborohydride reduction followed by de-O-silylation, the O-methyloxime and N-benzylnitrone of 5′-TBDMS-3′-ketothymidine gave resolvable epimeric mixtures of 1-[2,3-dideoxy-3-(N-methoxyamino)-β-d-threo-and β-d-erythro-pentofuranosyl]thymine and 1-[3-(N-benzyl-N-hydroxyamino)-2,3-dideoxy-β-d-threo- and β-d-erythro-pentofuranosyl]thymine respectively. These compounds were inactive against HIV. On the other hand, 1-[2,3-dideoxy-3-(N-hydroxyamino)-5-O-TBDMS-β-d-threo-pentofuranosyl]thymine, upon treatment with acetone, then de-O-silylation, gave the bicyclonucleoside analogue 15, slightly more active against HIV in vitro than DDI.

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Synthesis and Anti-HIV Activity of Further Examples of 1-[3-Deoxy-3-(N-hydroxyamino)-β-d-threo-(and β-d-erythro)-pentofuranosyl]thymine Derivatives¹

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Synthesis and Anti-HIV Activity of Further Examples of 1-[3-Deoxy-3-(N-hydroxyamino)-β-d-threo-(and β-d-erythro)-pentofuranosyl]thymine Derivatives1

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Synthesis and Anti-HIV Activity of Further Examples of 1-[3-Deoxy-3-(N-hydroxyamino)-β-d-threo-(and β-d-erythro)-pentofuranosyl]thymine Derivatives¹