Radhia Mazri - Academia.edu (original) (raw)

Papers by Radhia Mazri

Research paper thumbnail of Approche des relations structure-activités dans des nouveaux macrodiolides antibiotiques basée sur la mécanique moléculaire

Le present travail concerne une recherche fondamentale sur la relation structure - activite dans ... more Le present travail concerne une recherche fondamentale sur la relation structure - activite dans des nouveaux macrodiolides antibiotiques a 16 chainons. II est base sur la modelisation moleculaire (QSAR, mecanique moleculaire et dynamique moleculaire, PM3 et Ab-initio). L'analyse conformationnelle des macrocycles symetriques et dissymetriques a 16 chainons montre que les macrocycles 16s ont une mobilite conformationnelle les plus elevees. Les types conformationnels les plus privilegies dans les systemes symetriques de type 4 et dans le systeme dissymetriques de type 6. La structure symetrique represente le noyau de base de nombreux macrodiolides antibiotiques a 16 chainons. Nous avons defini les motifs structuraux intervenant dans les proprietes antibiotiques des nouveaux macrodiolides. Dans les composes substitues, le compose (6), dibromo-7, 15 macrodiolide est le plus actif chimiquement, et le carbone (2) est plus privilegie pour subir une attaque electrophile. Le pyrenophorol...

Research paper thumbnail of Nouvelle approche des relations structures-activités dans des molécules antibiotiques

Le present travail comporte une recherche fondamentale et originale sur deux classes de composes,... more Le present travail comporte une recherche fondamentale et originale sur deux classes de composes, les oxazoles et les thiazoles, dans le but est de predire la reactivite chimique et l’activite biologique dans des nouvelles molecules bioactives. Les methodes de modelisation moleculaire utilisees dans notre travail sont : PM3, (HF/ 6-31** G et DFT /B3LYP/6-31** G). Ces methodes ont ete utilisees pour determiner les parametres structuraux, electroniques et energetiques associes aux molecules etudiees. Cette etude presente des resultats similaires entre ces differentes methodes de calcul, la nature de type de substituant (donneur, accepteur) influe sur les parametres electroniques et energetiques du noyau de base des deux classes de composes. En effet, cette etude nous permet de predire la reactivite chimique des derives de deux types de molecule. Une etude qualitative de la relation structure -activite a ete effectuee egalement pour une series bioactives de derives des thiazoles. Les m...

Research paper thumbnail of Electronic Structure and Effect of Methyl Substitution in Oxazole and Thiazole by Quantum Chemical Calculations

Research Journal of Pharmaceutical, Biological and Chemical Sciences

Geometric and electronic structure of oxazole and thiazole and the effect of methyl group substit... more Geometric and electronic structure of oxazole and thiazole and the effect of methyl group substitution in thiazole and oxazole have been studied by PM3, ab initio method and density functional Theory. In the present work, the calculated values, namely net charges, bond length, dipole moments, ionization potentials, electronaffinities and heats of formation are reported and discussed in terms of the reactivity of oxazole and thiazole systems. Keywords: PM3, DFT, HOMO, LUMO, oxazole and thiazole

Research paper thumbnail of Conformational Analysis, Substituent Effect and Structure Activity Relationships of 16-Membered Macrodiolides

International Letters of Chemistry, Physics and Astronomy, 2014

Electronic structures, Conformational Analysis, effect of the substitution and structure activity... more Electronic structures, Conformational Analysis, effect of the substitution and structure activity Relationships for macrodiolides, have been studied by PM3 and ab initio methods. In the present work, the calculated values, namely net charges, bond lengths, MESP, dipole moments, electron-affinities, heats of formation, drug-likeness and QSAR properties, are reported and discussed in terms of the biological activity of macrodiolides.

Research paper thumbnail of Electronic Structure and Physical-Chemistry Properties Relationship for Phenothiazine Derivatives by Quantum Chemical Calculations

Journal of Computational and Theoretical Nanoscience, 2014

ABSTRACT Electronic structures, effect of the substitution and structure physical-chemistry prope... more ABSTRACT Electronic structures, effect of the substitution and structure physical-chemistry properties relationship for phenothiazine derivatives, have been studied by PM3, ab initio, and DFT theory. In the present work, the calculated values, namely net charges, bond lengths, dipole moments, electron-affinities, heats of formation and QSAR properties, are reported and discussed in terms of the biological activity of aliphatic phenothiazine.

Research paper thumbnail of Electronic Structure and Physico-Chemical Property Relationship for Thiazole Derivatives

Asian Journal of Chemistry, 2013

Electronic structure, effect of the substitution and structure physico-chemical property relation... more Electronic structure, effect of the substitution and structure physico-chemical property relationship for thiazole derivatives, has been studied by ab initio and DFT method. In the present work, the calculated values, i.e., net charges, bond lengths, dipole moments, electronaffinities, heats of formation and QSAR properties, are reported and discussed in terms of the reactivity of thiazole derivatives.

Research paper thumbnail of Approche des relations structure-activités dans des nouveaux macrodiolides antibiotiques basée sur la mécanique moléculaire

Le present travail concerne une recherche fondamentale sur la relation structure - activite dans ... more Le present travail concerne une recherche fondamentale sur la relation structure - activite dans des nouveaux macrodiolides antibiotiques a 16 chainons. II est base sur la modelisation moleculaire (QSAR, mecanique moleculaire et dynamique moleculaire, PM3 et Ab-initio). L'analyse conformationnelle des macrocycles symetriques et dissymetriques a 16 chainons montre que les macrocycles 16s ont une mobilite conformationnelle les plus elevees. Les types conformationnels les plus privilegies dans les systemes symetriques de type 4 et dans le systeme dissymetriques de type 6. La structure symetrique represente le noyau de base de nombreux macrodiolides antibiotiques a 16 chainons. Nous avons defini les motifs structuraux intervenant dans les proprietes antibiotiques des nouveaux macrodiolides. Dans les composes substitues, le compose (6), dibromo-7, 15 macrodiolide est le plus actif chimiquement, et le carbone (2) est plus privilegie pour subir une attaque electrophile. Le pyrenophorol...

Research paper thumbnail of Nouvelle approche des relations structures-activités dans des molécules antibiotiques

Le present travail comporte une recherche fondamentale et originale sur deux classes de composes,... more Le present travail comporte une recherche fondamentale et originale sur deux classes de composes, les oxazoles et les thiazoles, dans le but est de predire la reactivite chimique et l’activite biologique dans des nouvelles molecules bioactives. Les methodes de modelisation moleculaire utilisees dans notre travail sont : PM3, (HF/ 6-31** G et DFT /B3LYP/6-31** G). Ces methodes ont ete utilisees pour determiner les parametres structuraux, electroniques et energetiques associes aux molecules etudiees. Cette etude presente des resultats similaires entre ces differentes methodes de calcul, la nature de type de substituant (donneur, accepteur) influe sur les parametres electroniques et energetiques du noyau de base des deux classes de composes. En effet, cette etude nous permet de predire la reactivite chimique des derives de deux types de molecule. Une etude qualitative de la relation structure -activite a ete effectuee egalement pour une series bioactives de derives des thiazoles. Les m...

Research paper thumbnail of Electronic Structure and Effect of Methyl Substitution in Oxazole and Thiazole by Quantum Chemical Calculations

Research Journal of Pharmaceutical, Biological and Chemical Sciences

Geometric and electronic structure of oxazole and thiazole and the effect of methyl group substit... more Geometric and electronic structure of oxazole and thiazole and the effect of methyl group substitution in thiazole and oxazole have been studied by PM3, ab initio method and density functional Theory. In the present work, the calculated values, namely net charges, bond length, dipole moments, ionization potentials, electronaffinities and heats of formation are reported and discussed in terms of the reactivity of oxazole and thiazole systems. Keywords: PM3, DFT, HOMO, LUMO, oxazole and thiazole

Research paper thumbnail of Conformational Analysis, Substituent Effect and Structure Activity Relationships of 16-Membered Macrodiolides

International Letters of Chemistry, Physics and Astronomy, 2014

Electronic structures, Conformational Analysis, effect of the substitution and structure activity... more Electronic structures, Conformational Analysis, effect of the substitution and structure activity Relationships for macrodiolides, have been studied by PM3 and ab initio methods. In the present work, the calculated values, namely net charges, bond lengths, MESP, dipole moments, electron-affinities, heats of formation, drug-likeness and QSAR properties, are reported and discussed in terms of the biological activity of macrodiolides.

Research paper thumbnail of Electronic Structure and Physical-Chemistry Properties Relationship for Phenothiazine Derivatives by Quantum Chemical Calculations

Journal of Computational and Theoretical Nanoscience, 2014

ABSTRACT Electronic structures, effect of the substitution and structure physical-chemistry prope... more ABSTRACT Electronic structures, effect of the substitution and structure physical-chemistry properties relationship for phenothiazine derivatives, have been studied by PM3, ab initio, and DFT theory. In the present work, the calculated values, namely net charges, bond lengths, dipole moments, electron-affinities, heats of formation and QSAR properties, are reported and discussed in terms of the biological activity of aliphatic phenothiazine.

Research paper thumbnail of Electronic Structure and Physico-Chemical Property Relationship for Thiazole Derivatives

Asian Journal of Chemistry, 2013

Electronic structure, effect of the substitution and structure physico-chemical property relation... more Electronic structure, effect of the substitution and structure physico-chemical property relationship for thiazole derivatives, has been studied by ab initio and DFT method. In the present work, the calculated values, i.e., net charges, bond lengths, dipole moments, electronaffinities, heats of formation and QSAR properties, are reported and discussed in terms of the reactivity of thiazole derivatives.