A Catalytic Cross-Olefination of Diazo Compounds with Sulfoxonium Ylides
A ruthenium-catalysed cross-olefination of diazo compounds and sulfoxonium ylides is presented. Our reaction design exploits the intrinsic difference in reactivity of diazo compounds and sulfoxonium ylides as both carbene precursors and nucleophiles, which results in a highly selective reaction.
Neuhaus, James D.,Bauer, Adriano,Pinto, Alexandre,Maulide, Nuno
p. 16215 - 16218
(2018/11/23)
A robust multifunctional ligand-controlled palladium-catalyzed carbonylation reaction in water
A novel, hydrophilic and recyclable methoxypolyethylene glycol (PEG)-modulated s-triazine-based multifunctional Schiff base/N,P-ligand L9 was prepared and used in Pd-catalyzed Heck-type carbonylative coupling reactions, affording diverse chalcone derivatives and 1,4-dicarbonyl esters in good yields.
Enantioselective conjugate addition of aliphatic thiols to divergently activated electron poor alkenes and dienes
Divergently activated double bonds in electron poor 4-oxo-butenoates and (2E,4E)-6-oxo-2,4-dienoates underwent stereoselective and regioselective addition of mercaptans catalyzed by simple Cinchona alkaloids. Application of quinine and quinidine afforded both enantiomers of the 1,4-adducts with respect to the ketone carbonyl group in ees of up to 80%. Single recrystallization of some adducts resulted in further enrichment of up to 99%ee.
Kowalczyk, Rafa?,Wierzba, Aleksandra J.,Boratyński, Przemys?aw J.,Ba?kowicz, Julia
supporting information
p. 5834 - 5842
(2015/03/30)
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