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Synthèse de nouvelles bases de schiff pour la catalyse asymétrique

Synthèse de nouvelles bases de schiff pour la catalyse asymétrique

          
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About the Book

Dans ce travail de thèse, nous avons mis au point une nouvelle méthode de synthèse des bases de Schiff tétraazotées chirales, qui possèdent en positions ortho et para des noyaux aromatiques, des fonctions amines ou sulfonamides. Ensuite ces bases de Schiff ont servi de ligands pour préparer des complexes avec des métaux de transition. Nous avons pu isoler et caractériser un certain nombre de ces complexes notamment avec le cuivre, le cobalt, le nickel et le zinc. Une structure biszwittérionique du ligand (1R,2R)-N, N'-bis(2-triflataaminobenzylidène)-1,2- diaminocyclohexane (H2CyTf) 23 a été mise en évidence par diffraction X et par RMN. Ces bases de Schiff utilisées en hydrogénation asymétrique d'acétophénone en présence des précurseurs de ruthénium, nous ont permis d'obtenir des résultats intéressants.Une conversion complète et un excès énantiomérique de 76% ont été obtenus avec le système Ru(PPh3)3Cl2/(1R,2R)-N, N'-bis(2-p- tosylaminobenzylidène)-1,2-diphényléthylénediamine 29. Nous avons aussi mis au point une nouvelle méthode efficace et régiosélective pour le réarrangement de Meinwald catalysé par le IrCl3.xH2O


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Product Details
  • ISBN-13: 9786131573255
  • Publisher: Omniscriptum
  • Publisher Imprint: Omniscriptum
  • Height: 229 mm
  • No of Pages: 120
  • Series Title: Omn.Univ.Europ.
  • Weight: 190 gr
  • ISBN-10: 6131573255
  • Publisher Date: 28 Feb 2018
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Spine Width: 7 mm
  • Width: 152 mm


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