Abstract
AbstractThe title compounds (I), which are stable as pure liquids or in aprotic solutions, decompose in aqueous solution in the pH range 9‐ 12. The dependence of the rate constants on pH, buffer pKa and buffer concentration (buffer: cyclohexylaminopropanesulfonic acid (CAPS), phosphate, carbonate), as well as an inverse solvent isotope effect exhibit that the initial step of the reaction of (Ia) or (Ib) is specific acid‐catalyzed which is followed by a rate‐limiting general base‐catalyzed reaction in the presence of carbonate and phosphate.
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