Application of Bulky NHC–Rhodium Complexes in Efficient S–Si and S–S Bond Forming Reactions

Autor:	Małgorzata Bołt, Patrycja Żak
Rok vydání:	2021
Předmět:	chemistry.chemical_classification Chemistry chemistry.chemical_element Combinatorial chemistry Article Coupling reaction Silsesquioxane Rhodium Catalysis Inorganic Chemistry chemistry.chemical_compound Reagent Thiol Physical and Theoretical Chemistry Carbene
Zdroj:	Inorganic Chemistry
ISSN:	1520-510X 0020-1669
Popis:	The efficient and straightforward syntheses of silylthioethers and disulfides are presented. The synthetic methodologies are based on new rhodium complexes containing bulky N-heterocyclic carbene (NHC) ligands that turned out to be efficient catalysts in thiol and thiol–silane coupling reactions. These green protocols, which use easily accessible reagents, allow obtaining compounds containing S–Si and S–S bonds in solvent-free conditions. Additionally, preliminary tests on coupling of mono- and octahydro-substituted spherosilicates with selected thiols have proved to be very promising and showed that these catalytic systems can be used for the synthesis of a novel class of functionalized silsesquioxane derivatives. Two novel rhodium complexes bearing bulky N-heterocyclic carbene ligands have been synthesized and isolated. Both compounds enable efficient and selective formation of silylthioethers and disulfides in solvent-free conditions. A comparison between bulky NHC−rhodium complexes and their smaller derivatives shows that the steric hindrance around the metal center is crucial for effective formation of a product in both catalytic reactions. It has also been proved that the catalysts can be reused several times without loss of activity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19afd993c19ea3267b025fd06454ef4c https://doi.org/10.1021/acs.inorgchem.1c02160 Zobrazit plný text záznamu