Water-promoted cascade synthesis of α-arylaldehydes from arylalkenes using N-halosuccinimides: an avenue for asymmetric oxidation using Cinchona organocatalysis
作者:Abhishek Sharma、Naina Sharma、Rakesh Kumar、Upendra K. Sharma、Arun K. Sinha
DOI:10.1039/b908717f
日期:——
The direct oxidation of arylalkenes into α-arylaldehydes is achieved for the first time in water without relying on transition metal catalysts, and a novel organocatalytic enantioselective approach is also explored to provide up to 30% ee in initial investigations.
Zeolites as equilibrium-shifting agents in shuttle catalysis
作者:Jesse Dallenes、Jonas Wuyts、Niels Van Velthoven、Andraž Krajnc、Gregor Mali、Oleg A. Usoltsev、Aram L. Bugaev、Dirk De Vos
DOI:10.1038/s41929-023-00967-8
日期:——
we show an approach that harnesses the shape-selective and catalytic properties of zeolites to drive the shuttling equilibrium of transfer hydrocyanation and transfer hydroformylationreactions to near-completion. The zeolites irreversibly convert the transfer reaction co-products in an exergonic tandem reaction while excluding the substrates via pore size restrictions. Through fine-tuning of the zeolite’s