Diversity oriented syntheses of fused pyrimidines designed as potential antifolates

Colin L. Gibson, Judith K. Huggan, Alan Kennedy, Lionel Kiefer, Jeong Hwan Lee, Colin J. Suckling, Carol Clements, Alan L. Harvey, William N. Hunter, Lindsay B. Tulloch

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    45 Citations (Scopus)
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    Abstract

    Diversity oriented syntheses of some furo[2,3-d]pyrimidines and pyrrolo[2,3-d] pyrimidines related to folate, guanine, and diaminopyrimidine-containing drugs have been developed for the preparation of potential anti-infective and anticancer compounds. Amide couplings and Suzuki couplings on the basic heterocyclic templates were used, in the latter case yields being especially high using aromatic trifluoroborates as the coupling partner. A new ring synthesis of 6-aryl-substituted deazaguanines bearing 2-alkylthio groups has been developed using Michael addition of substituted nitrostyrenes. Diversity at C-2 has been introduced by oxidation and substitution with a range of amino nucleophiles. The chemical reactivity of these pyrrolopyrimidines with respect to both electrophilic substitution in ring synthesis and nucleophilic substitution for diversity is discussed. Several compounds were found to inhibit pteridine reductases from the protozoan parasites Trypanosoma brucei and Leishmania major at the micromolar level and to inhibit the growth of Trypanosma brucei brucei in cell culture at higher concentrations. From these results, significant structural features required for inhibition of this important drug target enzyme have been identified.

    Original languageEnglish
    Pages (from-to)1829-1842
    Number of pages14
    JournalOrganic and Biomolecular Chemistry
    Volume7
    Issue number9
    DOIs
    Publication statusPublished - 2009

    Keywords

    • DIHYDROFOLATE-REDUCTASE INHIBITORS
    • CROSS-COUPLING REACTIONS
    • TYROSINE KINASE INHIBITORS
    • SOLID-PHASE SYNTHESIS
    • BIOLOGICAL EVALUATION
    • THYMIDYLATE SYNTHASE
    • RECEPTOR ANTAGONISTS
    • SELECTIVE INHIBITORS
    • CONVENIENT SYNTHESIS
    • ANTITUMOR AGENTS

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