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Titre : Reductive removal of trityl group from tetrazoles via indium : Zinc and Arene catalyzed lithiation Type de document : texte imprimé Auteurs : Kenza Bouchelouche, Auteur ; Cherif Behloul, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 202 f. Format : 30 cm. Note générale : 2 copies imprimes disponibles Langues : Anglais (eng) Catégories : Français - Anglais
ChimieTags : chimie organique Tétrazoles protéction aréne lithiation cleavage zinc indium trityl Tetrazoles protection arene تيترازول ليثيوم حلقة ارينية حماية ازاحة زنك انديوم تريتيل Index. décimale : 540 Chimie et sciences connexes Résumé : This manuscript describes the reductive removal of trityl groups from N-protected
tetrazoles, using indium, zinc and arene-catalysed lithiation processes.
Chapters 1 and 2 report the development of two efficient processes one for transforming a
wide variety of nitriles into the corresponding tetrazoles in high yield, using a simple and sofe
protocole, and other to protect tetrazoles wich is our starting materials.
Chapter 3 shows the deprotection of the trityl (triphenylmethyl) group, from tritylated
tetrazoles using lithium powder and a catalytic amount of naphtalene to give corresponding free
tetrazoles without decomposition of the tetrazole ring.
Chapter 4 describes the reductive cleavage of the same group from the same protected Ntetrazoles using indium as a source of free electron transfer which can show you a good method
even in the presence of the air moister.
Chapter 5 In the latter case, deals with the deblocking of tetrazoles, protected with trityl
group, respectively. Using in this case zinc as a dissolving metal in Methanol/THF, in the
opposite of lithium; this methodology led to the removal of this group from different tetrazoles
even in the presence of the proton source.
Diplôme : Doctorat En ligne : ../theses/chimie/BOU6831.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10123 Reductive removal of trityl group from tetrazoles via indium : Zinc and Arene catalyzed lithiation [texte imprimé] / Kenza Bouchelouche, Auteur ; Cherif Behloul, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 202 f. ; 30 cm.
2 copies imprimes disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
ChimieTags : chimie organique Tétrazoles protéction aréne lithiation cleavage zinc indium trityl Tetrazoles protection arene تيترازول ليثيوم حلقة ارينية حماية ازاحة زنك انديوم تريتيل Index. décimale : 540 Chimie et sciences connexes Résumé : This manuscript describes the reductive removal of trityl groups from N-protected
tetrazoles, using indium, zinc and arene-catalysed lithiation processes.
Chapters 1 and 2 report the development of two efficient processes one for transforming a
wide variety of nitriles into the corresponding tetrazoles in high yield, using a simple and sofe
protocole, and other to protect tetrazoles wich is our starting materials.
Chapter 3 shows the deprotection of the trityl (triphenylmethyl) group, from tritylated
tetrazoles using lithium powder and a catalytic amount of naphtalene to give corresponding free
tetrazoles without decomposition of the tetrazole ring.
Chapter 4 describes the reductive cleavage of the same group from the same protected Ntetrazoles using indium as a source of free electron transfer which can show you a good method
even in the presence of the air moister.
Chapter 5 In the latter case, deals with the deblocking of tetrazoles, protected with trityl
group, respectively. Using in this case zinc as a dissolving metal in Methanol/THF, in the
opposite of lithium; this methodology led to the removal of this group from different tetrazoles
even in the presence of the proton source.
Diplôme : Doctorat En ligne : ../theses/chimie/BOU6831.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10123 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6831 BOU/6831 Thèse Bibliothèque principale Thèses Disponible Removal of Pivaloyl and trityl groups from Tetrazoles and alcohols via Indium, lithium chloride and arene catalyzed lithiation / Aicha Chouti
Titre : Removal of Pivaloyl and trityl groups from Tetrazoles and alcohols via Indium, lithium chloride and arene catalyzed lithiation Type de document : texte imprimé Auteurs : Aicha Chouti, Auteur ; Cherif Behloul, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 201 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Arganic synthesis tetrazoles alcohols lithium indium lithium chloride pivaloyl chloride trityl
ether tétrazoles alcools chlorure de lithium chlorure de pivaloyle éther tritylé لتیترزول الكحولات اللیثیوم الإندیوم كلورید اللیثیوم كلورید البیفالویل تریتیل
الاثیرIndex. décimale : 540 Chimie et sciences connexes Résumé : This manuscript encloses three principal parts: the first part, we have described the
synthesis of tetrazoles which are a class of heterocycles with a wide range of applications in
medicinal chemistry and in material sciences. We report herein a novel efficient process for
transforming a wide variety of nitriles into the corresponding tetrazoles in high yield, using a
simple and safe protocol.
We have reported in the second part, the protection of tetrazoles using pivaloyl chloride, the
same reaction is made to protect a wide range of alcohols with trityl chloride giving trityl
ethers and pivaloyl tetrazoles in good yields.
Finally, we have reported the use of lithium and a catalytic amount of naphthalene to remove
the pivaloyl protecting group from tetrazoles under very mild condition we have reported
successfully the use of a new catalyst for the detritylation of trityl ethers using indium and
lithium chloride generally with very good yields.Diplôme : Doctorat En ligne : ../theses/chimie/CHO6838.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10113 Removal of Pivaloyl and trityl groups from Tetrazoles and alcohols via Indium, lithium chloride and arene catalyzed lithiation [texte imprimé] / Aicha Chouti, Auteur ; Cherif Behloul, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 201 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Arganic synthesis tetrazoles alcohols lithium indium lithium chloride pivaloyl chloride trityl
ether tétrazoles alcools chlorure de lithium chlorure de pivaloyle éther tritylé لتیترزول الكحولات اللیثیوم الإندیوم كلورید اللیثیوم كلورید البیفالویل تریتیل
الاثیرIndex. décimale : 540 Chimie et sciences connexes Résumé : This manuscript encloses three principal parts: the first part, we have described the
synthesis of tetrazoles which are a class of heterocycles with a wide range of applications in
medicinal chemistry and in material sciences. We report herein a novel efficient process for
transforming a wide variety of nitriles into the corresponding tetrazoles in high yield, using a
simple and safe protocol.
We have reported in the second part, the protection of tetrazoles using pivaloyl chloride, the
same reaction is made to protect a wide range of alcohols with trityl chloride giving trityl
ethers and pivaloyl tetrazoles in good yields.
Finally, we have reported the use of lithium and a catalytic amount of naphthalene to remove
the pivaloyl protecting group from tetrazoles under very mild condition we have reported
successfully the use of a new catalyst for the detritylation of trityl ethers using indium and
lithium chloride generally with very good yields.Diplôme : Doctorat En ligne : ../theses/chimie/CHO6838.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10113 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHO/6838 CHO/6838 Thèse Bibliothèque principale Thèses Disponible
Titre : Synthèse, étude structurale par diffraction des rayons X et topologique de nouveaux matériaux à base de composés cycliques azotés. Type de document : texte imprimé Auteurs : Mohamed Abdellatif Bensegueni, Auteur ; Aouatef Cherouana, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 252 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Tétrazole imidazole synthèse InSitu par voie hydrothermale topologie comportement thermique matériau diélectrique Tetrazoles imidazoles topologies hydrothermal InSitu synthesis thermal stability dielectric materials تترازولات إميدازولات طوبولوجيا دراسة جزيئية خصائص حرارية خصائص كهربائية Index. décimale : 540 Chimie et sciences connexes Résumé : The [2+3] Cycloaddition between an azide and a nitrile, is a reaction catalyzed by zinc, and it is of a great interest because of its efficiency, still it presents a disadvantage that is of producing highly toxic and explosives intermediates, fortunately another synthesis protocol appears. The protocol was developed by the researcher Ren-Gen Xiong, it is called; InSitu hydrothermal synthesis, this method attracted much interest. It was applied in the synthesis of most of the products studied in this thesis for the development of structures based on tetrazole with new
topologies.
The compounds reported in this manuscript are salts, or mononuclear coordination compounds, has mono, di- or polymeric forms and comprising imidazole or tetrazole functions. TGA-DSC thermal behavior studies as well as infrared and Raman spectroscopic analysis are reported in this manuscript.
We report here, six compounds synthesized by hydrothermal method including a strontium-based complex which is regarded as the first example of a new topology (3.42), (34.422.522.617.7), and two other complexes based imidazole obtained by aqueous conditions, both containing imidazole and thiocyano group.
Tetrazole-based complexes are high energy compounds and having dielectric properties, a first test of dielectric measurement was carried out on a calcium-containing complex, and show a behavior similar to that found in the literature the analysis continues on the other compounds reported herein and it is a part of the perspectives of this thesis.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BEN6861.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10175 Synthèse, étude structurale par diffraction des rayons X et topologique de nouveaux matériaux à base de composés cycliques azotés. [texte imprimé] / Mohamed Abdellatif Bensegueni, Auteur ; Aouatef Cherouana, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 252 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Tétrazole imidazole synthèse InSitu par voie hydrothermale topologie comportement thermique matériau diélectrique Tetrazoles imidazoles topologies hydrothermal InSitu synthesis thermal stability dielectric materials تترازولات إميدازولات طوبولوجيا دراسة جزيئية خصائص حرارية خصائص كهربائية Index. décimale : 540 Chimie et sciences connexes Résumé : The [2+3] Cycloaddition between an azide and a nitrile, is a reaction catalyzed by zinc, and it is of a great interest because of its efficiency, still it presents a disadvantage that is of producing highly toxic and explosives intermediates, fortunately another synthesis protocol appears. The protocol was developed by the researcher Ren-Gen Xiong, it is called; InSitu hydrothermal synthesis, this method attracted much interest. It was applied in the synthesis of most of the products studied in this thesis for the development of structures based on tetrazole with new
topologies.
The compounds reported in this manuscript are salts, or mononuclear coordination compounds, has mono, di- or polymeric forms and comprising imidazole or tetrazole functions. TGA-DSC thermal behavior studies as well as infrared and Raman spectroscopic analysis are reported in this manuscript.
We report here, six compounds synthesized by hydrothermal method including a strontium-based complex which is regarded as the first example of a new topology (3.42), (34.422.522.617.7), and two other complexes based imidazole obtained by aqueous conditions, both containing imidazole and thiocyano group.
Tetrazole-based complexes are high energy compounds and having dielectric properties, a first test of dielectric measurement was carried out on a calcium-containing complex, and show a behavior similar to that found in the literature the analysis continues on the other compounds reported herein and it is a part of the perspectives of this thesis.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/BEN6861.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10175 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/6891 BEN/6891 Thèse Bibliothèque principale Thèses Disponible
