The mechanism of formamide hydrolysis in water from ab initio calculations and simulations

L Gorb, A Asensio, I Tuñón… - Chemistry–A European …, 2005 - Wiley Online Library
The neutral hydrolysis of formamide in water is a suitable reference to quantify the efficiency
of proteolytic enzymes. However, experimental data for this reaction has only very recently …

Theoretical studies on the ring opening of β-lactams: Processes in solution and in enzymatic media

R Lopez, MI Menendez, N Diaz… - Current Organic …, 2006 - ingentaconnect.com
Herein we present an overview of the theoretical studies on the cleavage of the β-lactam CN
bond in aqueous solution and in enzymatic media. We discuss first the alkaline hydrolysis of …

Detection of antibiotic residues in Cow's milk: A theoretical and experimental vibrational study

RC Teixeira, LC Luiz, GMA Junqueira, MJV Bell… - Journal of Molecular …, 2020 - Elsevier
The presence of antibiotic residues in milk has been one of the biggest challenges for public
health agencies. When these residues are above the established maximum limits, it …

DFT Studies on Schiff Base Formation of Vitamin B6 Analogues

A Salvà, J Donoso, J Frau, F Muñoz - The Journal of Physical …, 2003 - ACS Publications
A comprehensive study of Schiff base formation of vitamin B6 analogues by using DFT
calculations (B3LYP/6-31+ G*) and a study of the topology of the density charge function of …

Neutral and alkaline hydrolyses of model β-lactam antibiotics. An ab initio study of water catalysis

J Pitarch, MF Ruiz-López, E Silla… - Journal of the …, 1998 - ACS Publications
The effect of an ancillary water molecule on the neutral and alkaline hydrolysis mechanisms
of a simple β-lactam molecule (N-methylazetidinone) has been studied at the Hartree− Fock …

[PDF][PDF] Alkaline and acidic hydrolysis of the β-lactam ring

J Frau, M Coll, J Donoso, F Muñoz… - Electronic Journal of …, 1997 - academia.edu
SUMMARY A complete study of the alkaline and acidic hydrolysis of the β-lactam ring of
azetidin-2-one was carried out using ab initio molecular orbital calculations at the RHF/6 …

A density functional theory study of the mechanism of the Paal–Knorr pyrrole synthesis

B Mothana, RJ Boyd - Journal of Molecular Structure: THEOCHEM, 2007 - Elsevier
The Paal–Knorr pyrrole synthesis, which involves the reaction of 1, 4-dicarbonyls with
amines, is among the most classical methods of heterocyclic pyrrole ring synthesis. The …

Modelling the hydrolysis of succinimide: formation of aspartate and reversible isomerization of aspartic acid via succinimide

FAS Konuklar, V Aviyente - Organic & biomolecular chemistry, 2003 - pubs.rsc.org
In the present study, we have modelled the nucleophilic attack of water and a hydroxyl anion
on the carbonyl carbon of a succinimide derivative leading to aspartate and aspartic acid …

Ab initio calculations on neutral and alkaline hydrolyses of β-lactam antibiotics. A theoretical study including solvent effects

J Pitarch, MF Ruiz-López… - The Journal of …, 1997 - ACS Publications
In this work we present a theoretical study of neutral and alkaline hydrolyses of N-
methylazetidinone as a model of biological hydrolysis of β-lactam antibiotics. Calculations …

Theoretical studies on Schiff base formation of vitamin b6 analogues

A Salvà, J Donoso, J Frau, F Muñoz - Journal of Molecular Structure …, 2002 - Elsevier
A comprehensive study of Schiff base formation of vitamin b6 analogues in gas-phase and
water solvation environment is carried out using semiempirical (PM3) quantum mechanics …