Abstract
Designed as competitive inhibitors of the isomerization reaction catalyzed by the potential chemotherapeutic target phosphoglucose isomerases (PGI), d-arabinonamide-5-phosphate and d-arabinonhydrazide-5-phosphate were synthesized and fully characterized. These new types of phosphorylated sugar derivatives were easily and efficiently obtained in a one-step procedure from the promising synthon d-arabinono-1,4-lactone 5-phosphate. These two compounds proved to be new good competitive inhibitors of yeast PGI with the substrate d-fructose-6-phosphate, though not as strong as d-arabinonhydroxamic acid-5-phosphate. Overall, our results are in accord with the postulated 1,2- cis-enediolate species as a probable high-energy intermediate of the PGI-catalyzed reaction.
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