Macrocyle-embedded b-lactams as novel inhibitors of the Penicillin Binding Protein PBP2a from MRSADive, Georges ; ; et alin European Journal of Medicinal Chemistry (2013), 64 Detailed reference viewed: 4 (3 ULg) Governing Parameters of Long-Range Intramolecular S‑to‑N Acyl Transfers within (S)‑Acyl Isopeptides; Dive, Georges ; et alin Journal of Chemical Theory and Computation (2013), 9(2), 927-934 Detailed reference viewed: 11 (4 ULg) Dimeric bisindole alkaloids from the stem bark of Strychnos nux-vomica L.Jonville, Marie-Caroline ; Dive, Georges ; Angenot, Luc et alin Phytochemistry (2013), 87 Strychnos nux-vomica L. (Loganiaceae) is famous for its monomeric alkaloid content, such as strychnine, a convulsant poison. The stem bark of the tree is traditionally used to treat intermittent fever in ... [more ▼] Strychnos nux-vomica L. (Loganiaceae) is famous for its monomeric alkaloid content, such as strychnine, a convulsant poison. The stem bark of the tree is traditionally used to treat intermittent fever in South East Asia. In various studies, it appeared that dimeric indolo-monoterpenic alkaloids possess a promising activity on Plasmodium falciparum. Three bisindolomonoterpenic alkaloids together with strychnochrysine, previously identified in the root bark of S. nux-vomica, were isolated from the stem bark. The structures of these compounds were established using NMR spectroscopy and mass spectrometry. Stereochemistry of the compounds was confirmed by molecular modelling. This then allowed the structural determination of strychnoflavine, a coloured bisindole alkaloid previously isolated from the root bark of the tree. Moreover, the conformational inversion in alkaloids possessing an ether bond in the strychnane moiety could be easily predicted by specific δ 13C NMR values. These longicaudatine-type alkaloids were found to display in vitro antiplasmodial activity against a chloroquine resistant strain and a chloroquine sensitive strain. The most interesting was strychnochrysine showing an IC 50 value at around 10 μM. © 2012 Elsevier Ltd. All rights reserved. [less ▲] Detailed reference viewed: 19 (10 ULg) 12- to 22-membered bridged b-lactams as potential penicillin-binding protein inhibitors; Dive, Georges ; in Chemistry : An Asian Journal (2012), 7(2), 425-434 Detailed reference viewed: 7 (2 ULg) Novel fragments of clavulanate observed in the structure of the class A b-lactamase from Bacillus licheniformis BS3; Mercuri, Paola ; Herman, Raphaël et alin Journal of Antimicrobial Chemotherapy (2012), 67(10), 2379-2387 Detailed reference viewed: 12 (4 ULg) Combination of capillary electrophoresis, molecular modelling and nuclear magnetic resonance to study the interaction mechanisms between single-isomer anionic cyclodextrin derivatives and basic drug enantiomers in a methanolic background electrolyte.Servais, Anne-Catherine ; ; Dive, Georges et alin Journal of Chromatography. A (2012), 1232 In order to improve our knowledge of the mechanisms of enantiomer recognition pattern in nonaqueous systems, an approach combining nonaqueous CE (NACE), molecular modelling and NMR was undertaken ... [more ▼] In order to improve our knowledge of the mechanisms of enantiomer recognition pattern in nonaqueous systems, an approach combining nonaqueous CE (NACE), molecular modelling and NMR was undertaken. Bupivacaine and propranolol were selected as model compounds and their interactions with two single-isomer highly charged beta-CD derivatives, namely heptakis(2,3-di-O-methyl-6-O-sulfo)-beta-CD (HDMS-beta-CD) and heptakis(2,3-di-O-acetyl-6-O-sulfo)-beta-CD (HDAS-beta-CD), were studied. The CD-bupivacaine complexes were evaluated by 2-D Rotating-frame Overhauser Effect SpectroscopY (ROESY) experiments. From these experiments, it can be assumed that inclusion complexes are not formed, whatever the CD derivative used. Molecular modelling was performed at the RHF/MINI-1 or B3LYP/6-31G(d) level. External as well as inclusion type complexes with the alkyl chain of propranolol into both CD cavities were located. Interaction energies calculated for bupivacaine and propranolol correlated with the enantiomer migration order observed in the NACE experiments using both anionic CD derivatives. The interaction of propranolol with HDMS-beta-CD or HDAS-beta-CD gives rise to a family of external and inclusion complexes in which some are more probably obtained. [less ▲] Detailed reference viewed: 35 (13 ULg) Control in a dissipative environment: the example of a Cope rearrangement; Dive, Georges ; et alin Journal of Physical Chemistry A (2012), 116 Detailed reference viewed: 4 (2 ULg) Laser control in open quantum systems: preliminary analysis toward the Cope rearrangement control in methyl-cyclopentadienylcarboxylate dimerDive, Georges ; ; et alin Theoretical Chemistry Accounts : Theory, Computation, & Modeling (2012), 131(6), 1236-1247 Detailed reference viewed: 8 (2 ULg) UNDERSTANDING THE INTERACTIONS BETWEEN ARTEMISININ AND CYCLODEXTRINS: SPECTROSCOPIC STUDIES AND MOLECULAR MODELING; Dive, Georges ; Piel, Géraldine et alin Journal of Inclusion Phenomena and Molecular Recognition in Chemistry (2012), 74(1), 305-315 Detailed reference viewed: 19 (10 ULg) Quantum chemistry applied to the study of the beta-lactamasesDehareng, Dominique ; Dive, Georges ![]() in Frère, Jean-Marie (Ed.) Beta-lactamases (2012) Detailed reference viewed: 8 (2 ULg) Unprecedented inhibition of resistant penicillin binding proteins by bis-2-oxoazetidinyl macrocycles; Dive, Georges ; Zervosen, Astrid et alin MedChemComm (2012), 3 Detailed reference viewed: 12 (7 ULg) Non-symmetrically substituted phenoxazinones from laccase-mediated oxidative cross-coupling of aminophenols: an experimental and theoretical insight; Dive, Georges ; in Organic & Biomolecular Chemistry (2012), 10 Detailed reference viewed: 5 (2 ULg) Combination of capillary electrophoresis, molecular modelling and nuclear magnetic resonance to study the interaction mechanisms between single-isomer anionic CD derivatives and basic drug enantiomers in a methanolic background electrolyteServais, Anne-Catherine ; ; Dive, Georges et alPoster (2011, June) Detailed reference viewed: 17 (1 ULg) Systèmes génériques pour la séparation d’énantiomères de molécules basiques et acides à l’aide de cyclodextrines en électrophorèse capillaire en milieu non aqueuxServais, Anne-Catherine ; Rousseau, Anne ; Dive, Georges et alConference (2011, March 23) Detailed reference viewed: 34 (10 ULg) Design of new potent and selective secretory phospholipase A2 inhibitors. 6 - Synthesis, structure-activity relationships and molecular modelling of 1-substituted-4-[4,5-dihydro-1,2,4-(4H)-oxadiazol-5-one-3-yl(methyl)]-functionalized aryl piperazin/one/dione derivatives; ; et al in Bioorganic & Medicinal Chemistry (2010), 18 Detailed reference viewed: 61 (8 ULg) Moandaensine, a dimeric indole alkaloid from Strychnos moandaensis (Loganiaceae); Frederich, Michel ; et alin Phytochemistry Letters (2010), 3 Moandaensine contains a rare anhydronium base subunit. It presents a moderate antiplasmodial activity with IC values of 11.2 microM and 9.2 microM against , respectively, the chloroquino sensitive FCA 20 ... [more ▼] Moandaensine contains a rare anhydronium base subunit. It presents a moderate antiplasmodial activity with IC values of 11.2 microM and 9.2 microM against , respectively, the chloroquino sensitive FCA 20 GHA and chloroquino resistant W2 strains of Plasmodium falciparum [less ▲] Detailed reference viewed: 66 (31 ULg) Spectroscopic studies and molecular modeling for understanding the interactions between cholesterol and cyclodextrinsCastagne, Delphine ; Dive, Georges ; Evrard, Brigitte et alin Journal of Pharmacy & Pharmaceutical Sciences : A Publication of the Canadian Society for Pharmaceutical Sciences (2010), 13(2), 362-377 Detailed reference viewed: 28 (11 ULg) Cyclodimerization by ring-closing metathesis: synthesis, computational and biological evaluation of novel bis-azetidinyl-macrocycles; Dive, Georges ; et alin Tetrahedron (2010), 66 Detailed reference viewed: 16 (5 ULg) HDA cycloadditions of 1-diethoxyphosphonyl-1,3-butadiene with nitroso heterodienophiles: a computational investigation; Dive, Georges ; et alin Journal of Molecular Structure : Theochem (2010), 959 Detailed reference viewed: 16 (3 ULg) Studies for understanding the interactions between biological membranes and cyclodextrins and their effects at the cell levelCastagne, Delphine ; Frederich, Michel ; Evrard, Brigitte et alPoster (2009, June) Detailed reference viewed: 13 (5 ULg) |
||