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Syntheses of highly functionalised 6-substituted pteridines

Guiney, D. and Gibson, C.L. and Suckling, C.J. (2003) Syntheses of highly functionalised 6-substituted pteridines. Organic and Biomolecular Chemistry, 1 (4). pp. 664-675. ISSN 1477-0520

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Abstract

Methods for the synthesis of polyfunctional 6-substituted pteridines from the corresponding 6-aldehydes are described. Alkene, ester, ketone, amide, cyano, oxime, bromo, methoxy and dihydroxy functional groups have all been introduced principally through improved methodologies for Wittig reactions using 2-thioalkyl-6-formylpteridines as substrates. Further modification of the alkenes derived from the Wittig reactions was difficult but selective conversion to the vic-diol was possible using ligand assisted catalysis with osmium tetraoxide. These methods are a component of an extensive methodology for the preparation of compounds that might serve as modulators of tetrahydrobiopterin activity or as inhibitors of dihydroneopterin aldolase.