Abstract
The title compound has been prepared. Using 1H NMR, 13C NMR and selected decoupling method, the compound is shown in the keto-form. DNMR method was used to investigated the exchange between NH in the title compound and water in DMSO-d6. The rate process was calculated by complete line shape analysis method and activation parameters ΔH≠, ΔG≠ and ΔS≠ were found to be 8.4±0.5 kcalmol−1, 16.9±0.2 kcalmol−1 and −26.9±1.5 calmol−1 k−1 respectively.
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