4′-thio-L-xyloy furanosyl nucleosides, precursors...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Carbohydrate doai

Reexamination Certificate

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C514S045000, C514S241000, C514S262100, C514S263230, C514S269000, C514S242000, C514S342000, C514S249000, C514S616000, C536S027600, C536S027700, C536S027810, C536S028550, C544S264000, C549S013000

Reexamination Certificate

active

07838508

ABSTRACT:
Compounds represented by the formula 1:A is selected from the group consisting ofwherein each R individually is H or acyl, Y is X, N3, NH2, monoalkylamino, or dialkylamino; Z is O or S; andX is selected from the group consisting of hydrogen, halo, hydroxy, alkoxy, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, amino, monoalkylamino, dialkylamino, thioaryl, thioalkyl, allylamino, cyano and nitro; tautomers thereof; and pharmaceutically acceptable salts thereof are provided along with methods for their fabrication. Various of these compounds can be used as anticancer agents, or antiviral agents or to inhibit DNA replication.

REFERENCES:
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patent: 6596858 (2003-07-01), Sampath et al.
patent: 6914061 (2005-07-01), Secrist et al.
Trisha Gura; Science Nov. 7, 1997: vol. 278. No. 5340, pp. 1041-1042.
Jonges et al.'s reference, Antiviral Res 2009; 83:290-297.
David Douglas; reuters.com, “Drug-resistant influenza becoming trickier target”, Sep. 10, 2009, pp. 1-2.
“Synthesis and biological activity of certain 4′-thio-D-arabinofuranosylpurine nucleosides.” by Secrist III et al., J. Med. Chem. 41, pp. 3865-3871, 1988.
“Synthesis of (-(4-thioxylofuranosyl) adenine via a novel glycosylation reaction.” by Hartsel et al., Tetrahedron Letters, 39, pp. 205-208, 1998.

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