6533b7d3fe1ef96bd1260966
RESEARCH PRODUCT
Water-Assisted Alkaline Hydrolysis of Monobactams: A Theoretical Study
Estanislao SillaNatalia DíazDimas SuárezTomás L. SordoIñaki Tuñónsubject
Molecular StructureHydrolysisOrganic ChemistryInorganic chemistrySubstituentWaterGeneral ChemistryCatalysisIonSolventStructure-Activity RelationshipHydrolysischemistry.chemical_compoundModels ChemicalchemistryHydroxidesSolventsAzetidinesThermodynamicsMoleculeSolvent effectsMonobactamsAlkaline hydrolysisMonobactamsdescription
A theoretical study of the water-assisted alkaline hydrolysis of 2-azetidinone, 3-formylamino-2-azetidinone and 3-formylamino-2-azetidine-1-sulfonate ion is carried out at the B3LYP/6-31+G* level. The effect of bulk solvent is taken into account using the PCM solvation model while specific solvent effects are represented by the inclusion of an ancillary water molecule along the reaction profile. The calculated free energy barriers in solution are in reasonable agreement with experimental values. The observed substituent effects due to the presence of the 3-formylamino and the SO(3) groups attached to the beta-lactam ring are crucial factors determining the hydrolysis of monobactam antibiotics.
year | journal | country | edition | language |
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2002-02-15 | Chemistry - A European Journal |