<i>n</i>Bu<sub>4</sub>NI-Catalyzed α-Benzoxylation of Ketones with Terminal Aryl Alkenes
作者:Buddhadeb Mondal、Subas Chandra Sahoo、Subhas Chandra Pan
DOI:10.1002/ejoc.201500233
日期:2015.5
A metal-free protocol for the α-benzoxylation of ketones has been developed by using terminalarylalkenes as an arylcarboxy surrogate. Moderate to good yields were attained for a variety of propiophenones and acetophenones by using tetra-n-butylammonium iodide (TBAI) as the catalyst and tert-butyl hydroperoxide (TBHP) as the oxidant under ambient reaction conditions.
Bu4NI-catalyzed α-acyloxylation reaction of ethers and ketones with aldehydes and tert-butyl hydroperoxide
作者:Feng Zhu、Zhong-Xia Wang
DOI:10.1016/j.tet.2014.11.002
日期:2014.12
The reaction of (hetero)aromatic aldehydes or cinnamaldehyde with di-/multi-ethers in the presence of Bu4NI and tert-butylhydroperoxide generated corresponding α-acyloxy ethers. Reactions between (hetero)aromatic aldehydes or cyclohexanecarbaldehyde with arylalkyl ketones under similar conditions resulted in α-acyloxy ketones. Collectively, Bu4NI-catalyzed α-acyloxylation reactions exhibit a broad
Herein, a copper/TBHP catalyst system for the α-C–H acyloxylation of carbonyl compounds is developed using terminal alkynes as the acyloxy source. A variety of carbonyl compounds and terminal alkynes are tolerated in this reaction. In addition, its possible mechanism is proposed.