Copper-Catalyzed Oxaziridine-Mediated Oxidation of C–H Bonds
作者:Hashim F. Motiwala、Belgin Gülgeze、Jeffrey Aubé
DOI:10.1021/jo3012336
日期:2012.8.17
bonds has been observed via copper-catalyzed reactions of oxaziridines. The oxidation proceeded with a variety of substrates, primarily comprising allylic and benzylic examples, as well as one example of an otherwise unactivated tertiary C–H bond. The mechanism of the reaction is proposed to involve single-electrontransfer to the oxaziridines to generate a copper-bound radicalanion, followed by hydrogen
A protocol for the anti-Markovnikov hydrofunctionalization of alkenes has been developed by the use of a benzylgroup as a traceless redox-active hydrogen donor. Under copper catalysis and in the presence of CF3- or N3-containing hypervalent iodine reagents, a series of homoallylic alcohol derivatives were hydrofunctionalized regioselectivity. A similar principle was also applied to the hydrofunctionalization
Copper-catalyzed remote oxidation of alcohols initiated by radical difluoroalkylation of alkenes: facile access to difluoroalkylated carbonyl compounds
作者:Jian Zhang、Weiwei Jin、Cungui Cheng、Fang Luo
DOI:10.1039/c8ob00889b
日期:——
A Cu-catalyzed oxidation of alcohols triggered by the radical difluoroalkylation of alkenes has been developed, providing facile access to a series of difluoroalkylated ketones or aldehydes in moderate to high yields. The concurrent realization of the catalytic oxidation of alcohols and difluoroalkylation of alkenes enables a highly efficient and attractive method for organic synthesis.
Cyclopentane Formation from Flexible Precursors Using Samarium(II) Reagents
作者:Christopher D. Aretz、Humberto Escobedo、Bryan J. Cowen
DOI:10.1002/ejoc.201800102
日期:2018.4.30
This study presents three efficient methods for five‐membered ring carbocycle synthesis using samarium(II) reagents. Simple organic starting materials engage in intramolecular Reformatsky aldol, enolate alkylation, and pinacol cyclizations. A promising lead result has also been established demonstrating enantioselectivity in a chiral ligand controlled Reformatsky aldol reaction.