Glycosidic bond formation in aqueous solution: on the oxocarbenium intermediate |
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| Authors: | Stubbs John M Marx Dominik |
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| Affiliation: | Lehrstuhl für Theoretische Chemie, Ruhr-Universit?t Bochum, 44780 Bochum, Germany. stubbs@chem.umn.edu |
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| Abstract: | The mechanism of specific acid-catalyzed glycosidic bond formation between methanol and alpha-d-glucopyranoside in aqueous solution at 300 K was studied using Car-Parrinello molecular dynamics. The reaction was found to proceed through a non-solvent equilibrated oxocarbenium cation intermediate characterized by the loss of a hydrogen-bonding interaction between the ring oxygen and solvating water. The mechanism, which was found to be D(N)A(N) in nature, is discussed in detail. |
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