Tetrahedron p. 5111 - 5122 (1992)
Update date:2022-08-29
Topics:
Botella
Klaebe
Perie
Monnier
Aminolysis of carbamic esters, a model of the intermediate carboxybiotin in enzymatic carboxylations was studied in organic medium in the presence of a divalent cation. This study establishes electrostatic catalysis of aminolysis, the rate determining step of which is the collapse of the tetrahedral intermediate principally by carbon-nitrogen bond breaking. The results also account for the role of the divalent cation present in the carboxytransferase subunit of carboxylases.
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