Hydrogen/deuterium (H/D) exchange at the α-H of β-carbonyl esters has been used as a useful probe to demonstrate the kinetic aspects of cucurbituril-catalyzed processes. The rate constants for H/D exchange of ethyl acetoacetate (1), methyl acetoacetate (2) and dimethyl malonate (3) have been determined in the absence and presence of cucurbit uril by 1H NMR spectroscopy. H/D exchange at the α-H...
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