Highly Efficient Chromium-Catalyzed Oxidation of Secondary Benzylic Alcohols by Aqueous 70%<i>tert</i>-Butyl Hydroperoxide
作者:Jacques Muzart、Abdelaziz N'ait Ajjou
DOI:10.1055/s-1993-25941
日期:——
The oxidation of secondary benzylic alchols to ketones by the chromium(VI) oxide/tert-butyl hydroperoxide system is compatible wih the presence of methyl, halide, methoxy, acetoxy or nitro substituents on the aryl group and of an unsaturation on the alkyl side chain. Benzyl alchol led to a mixture of benzaldehyde and benzoic acid.
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.
作者:Douglass F. Taber、Yanong Wang、Thomas F. Pahutski
DOI:10.1021/jo991866u
日期:2000.6.1
Electrocatalytic Ketyl-Olefin Cyclization at a Favorable Applied Bias Enabled by a Concerted Proton–Electron Transfer Mediator
作者:Joseph Derosa、Pablo Garrido-Barros、Jonas C. Peters
DOI:10.1021/acs.inorgchem.2c00839
日期:2022.5.2
atom to organic substrates; however, direct application of CPET in the context of C–Cbondformation beyond homocoupling is underexplored. We report herein the expansion of electrocatalytic CPET (eCPET) using a Brønsted base-appended cobaltocene mediator ([CpCoCpNMe2][OTf]) with keto-olefin substrates that undergo cyclization subsequent to ketyl radical generation via eCPET. Using acetophenone-derived