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Showing 1 to 6 of 6 for “"Triazolium salts"”.
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Carbene catalyzed asymmetric nucleophilic acylations with novel triazolium salts
… synthesis of a family of new chiral trazolium salts from (S)-glutamic acid. With access to the new precarbene catalysts we started to verify their ability to promote the benzoin condensation and intramolecular Stetter reaction. The optimal conditions were identified and allowed for an expansion …
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Neue Heterazoliumsalze aus Prolin und Pyroglutaminsäure und Anwendungen in Carben-katalysierten asymmetrischen nucleophilen Acylierungen
… reaction. Catalysis with bicyclic heterazolium salts: A chiral triazolium salt that had been developed in the group of Prof. Dr. D. Enders as precatalyst for an asymmetric benzoin condensation was employed in other carbene catalysed reactions (acyloin condensations, intermolecular Stetter …
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Design and Synthesis of Chiral Triazolium and Thiazolium Salts Incorporating Hydrogen-Bonding Motifs as Organocatalysts
… and the reactions which are catalysed by these salts reviewed. Current shortcomings are addressed, and both the project and new catalyst designs are proposed. Synthetic routes to new triazolium and thiazolium salt catalysts with unreported chiral backbones are discussed. These involve …
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Preparation of Novel Carbenes and their Catalytic Application to the Cross-Benzoin, Aza-Benzoin and Stetter Reactions
… carbenes (NHCs) derived from bicyclic triazolium salts possessing a fused 6 membered ring were found to induce chemoselectivity in the cross-benzoin between aromatic and aliphatic aldehydes. Use of these catalysts gave rise to predominantly one cross-benzoin product which could be …
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Preparación estereoselectiva de interesantes líquidos iónicos y carbamatos mediante procesos de resolución cinética y desimetrización enzimática
… A. Menéndez-Velázquez, ¿From enantiopure chiral salts to enantiopure chiral ionic liquids by systematic structural modifications: A rational approach towards the efficient modular synthesis of enantiopure chiral imidazolium salts¿ Chem. Eur. J. 2010, 16, 836-847. J. González-Álvarez, D. …
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Correlation of Aqueous Solubility and Anti-Cancer Activity of Novel Triazolium and Imidazolium Salts
<p>Novel triazolium, imidazolium, and benzimidazolium salts are known to possess anti-cancer properties and have potential as cancer therapeutics. This thesis describes the aqueous solubility and the differential activity of N,AT-bis-substituted-l,2,4-triazolium bromide salts and …