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Barbituric acid (BA) cannot be used for synthesis of oligoetherols in a straightforward reaction with ethylene oxide (EO) or propylene oxide (PO) or alkylene carbonates because it undergoes tautomeric conversion into the tri-enolic form. The latter is insoluble in oxiranes and alkylene carbonates and does not react with them further. This obstacle was eliminated by initial functionalization of BA...
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