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- W2061600313 abstract "Phosphonopyruvate (1) is prepared in 56% yield from triethyl phosphonopyruvate (3) and pKa values of 1.63, 2.40 and 7.41 determined. The stability of phosphonopyruvate is monitored at 75 °C in aqueous buffers over the pH range 0.6 to 8.3. The only products detected are pyruvate and inorganic phosphate. The pH–rate profile shows that the C–P bond is hydrolysed fastest in the monoanion and dianion of phosphonopyruvate, with rate constants of 1.94 × 10–4 s–1 for the monoanion and 1.05 × 10–4 s–1 for the dianion. For the reaction at pH 4.75, where the dianion predominates, ΔH‡ is 114.0 kJ mor–1 and ΔS‡ is 5.4 J mol–1 K–1, the deuterium isotope effect, kH/kD is 1.08 ± 0.04, and there is non-selective phosphorylation of methanol and H2O in an equimolar solution of these solvents. These results are consistent with a mechanism of hydrolysis of both the monoanion and dianion that involves a very largely dissociative transition state with monomeric metaphosphate character." @default.
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- W2061600313 date "1991-01-01" @default.
- W2061600313 modified "2023-09-26" @default.
- W2061600313 title "Synthesis and hydrolysis studies of phosphonopyruvate" @default.
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- W2061600313 doi "https://doi.org/10.1039/p29910000263" @default.
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