Publication

Chiral Cationic (CpRu)-Ru-x(II) Complexes for Enantioselective Yne-Enone Cyclizations

Nicolai Cramer, David Kossler
2015
Journal Articles

Résumé

The cydopentadienyl (Cp) group is a ligand of great importance for many transition-metal complexes used in catalysis. Cationic CpRuII complexes with three free coordination sites are highly versatile catalysts for many atom-economic transformations. We report the synthesis of a family of (CpRuII)-Ru-x complexes with chiral Cp ligands keeping the maximum number of available coordination sites. The cationic members are efficient and selective catalysts for yne-enone cyclizations via formal hetero-Diels-Alder reactions. The transformation proceeds in

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https://infoscience.epfl.ch/entities/publication/9529fc90-ca0d-40e1-a6d8-66a376328eae

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Nicolai Cramer, David Kossler
2015
Journal Articles

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/9529fc90-ca0d-40e1-a6d8-66a376328eae

À propos de ce résultat

Concepts associés (15)

Unsaturated fat

An unsaturated fat is a fat or fatty acid in which there is at least one double bond within the fatty acid chain. A fatty acid chain is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond. A saturated fat has no carbon to carbon double bonds, so the maximum possible number of hydrogens bonded to the carbons, and is "saturated" with hydrogen atoms. To form carbon to carbon double bonds, hydrogen atoms are removed from the carbon chain.

Complexe de coordination

vignette| Le cisplatine est un complexe de coordination du platine() avec deux ligands chlorure et deux ligands ammoniac formant une ammine. C'est l'un des anticancéreux les plus connus. Un complexe de coordination est constitué d'un atome ou d'ion central, généralement métallique, appelé centre de coordination, et d'un réseau de molécules ou d'ions liés, appelés ligands. De nombreux composés contenant des métaux, en particulier ceux qui comprennent des métaux de transition (éléments tels que le titane qui appartiennent au bloc du tableau périodique), sont des complexes de coordination.

Saturated and unsaturated compounds

A saturated compound is a chemical compound (or ion) that resists addition reactions, such as hydrogenation, oxidative addition, and binding of a Lewis base. The term is used in many contexts and for many classes of chemical compounds. Overall, saturated compounds are less reactive than unsaturated compounds. Saturation is derived from the Latin word saturare, meaning 'to fill'. Unsaturated compounds generally carry out typical addition reactions that are not possible with saturated compounds such as alkanes.

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