<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.
Abstract The 1,2-dibromoethane- and KI-mediated α-acyloxylation of ketones is reported in moderate to good yield without the use of transition metals and strong oxidants. Various acids are well tolerated with wide functional group compatibility. An 1,2-dibromoethane- and KI-catalysed reaction mechanism is proposed based on the results of control experiments.
I<sub>2</sub>/TBHP-mediated oxidative coupling of ketones and toluene derivatives: a facile method for the preparation of α-benzoyloxy ketones
作者:Cui Chen、Weibing Liu、Peng Zhou、Hailing Liu
DOI:10.1039/c7ra02298k
日期:——
An efficient oxidative approach was developed for the α-benzoyloxylation of ketones using tert-butyl hydroperoxide (TBHP). This process provided facile access to a wide range of α-benzoyloxy ketones in good to excellent yields via the direct oxidative α-benzoyloxylation of a structurally diverse series of ketones using simple arylmethane compounds.
NBS/DBU mediated one-pot synthesis of α-acyloxyketones from benzylic secondary alcohols and carboxylic acids
作者:Minghui Zhu、Wei Wei、Daoshan Yang、Hong Cui、Huanhuan Cui、Xuejun Sun、Hua Wang
DOI:10.1039/c6ob02173e
日期:——
A simple and efficient one-pot NBS/DBU-mediated method has been developed for the synthesis of α-acyloxyketones from various benzylic secondary alcohols and carboxylic acids. Through this methodology, a series of α-acyloxyketones could be obtained in good to excellent yields under mild conditions. Importantly, this new reaction avoids the direct usage of toxic metal catalysts or potentially dangerous