The Bu4NI-catalyzed reaction of ketones with benzylic alcohols was achieved, leading to alfa-acyloxycarbonyl compounds in moderate to good yields. This metal-free procedure featured the employment of facilely and commercially available starting materials and TBHP as a clean oxidant with high atom economy.
<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.
Copper-Catalyzed Methyl Esterification Reactions via C–C Bond Cleavage
作者:Yan Zhu、Hong Yan、Linhua Lu、Defu Liu、Guangwei Rong、Jincheng Mao
DOI:10.1021/jo4016387
日期:2013.10.4
The highly effective synthesis of methyl esters from benzylic alcohols, aldehydes, or acids viacopper-catalyzedC–Ccleavage from tert-butyl hydroperoxide is reported in this paper for the first time. Our protocol is easily accessible and practical, making it a possible supplement for the traditional way.
Synthesis of tert-butyl peresters from aldehydes by Bu4NI-catalyzed metal-free oxidation and its combination with the Kharasch–Sosnovsky reaction
作者:Wei Wei、Chao Zhang、Yuan Xu、Xiaobing Wan
DOI:10.1039/c1cc14602e
日期:——
A new tert-butyl peresterssynthesis directly from aldehydes and TBHP was developed via Bu(4)NI-catalyzed aldehyde C-H oxidation. Mechanistic studies suggest that the protocol proceeds via a radical process. Combining the method with the Kharasch-Sosnovsky reaction offers a practical approach for the synthesis of allylic esters from simple aldehydes and alkenes via a two-step one-pot procedure.
Cobalt (II)-catalyzed direct C3-selective C–H acyloxylation of indoles with <i>tert</i>-butyl peresters
作者:Yuxiang Zhou、Guojun Chen、Chenglong Li、Xiaozu Liu、Peijun Liu
DOI:10.1080/00397911.2018.1524493
日期:2018.11.17
Abstract A Co(II)-catalyzed direct C3-selective C–H acyloxylation of indoles has been realized with tert-butyl peresters serving as both an acyloxy source and an oxidant. This reaction features highly C3 regioselectivity and good functional group tolerance, which provides a convenient and versatile approach to the construction of valuable 3-acyloxyindoles in moderate to excellent yields. Graphical