<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.
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.
One-pot synthesis of α-acyloxycarbonyl compounds via oxidative decarboxylation coupling reaction of α-oxo carboxylic acids with carbonyl compounds
作者:Li-Ming Chang、Gao-Qing Yuan
DOI:10.1016/j.tet.2016.09.031
日期:2016.11
With tetrabutylammonium iodide (TBAI) as the catalyst and tert-butyl hydroperoxide (TBHP) as the oxidant, a simple metal-free protocol has been developed for the synthesis of α-acyloxycarbonyl compounds from carbonylcompounds and α-oxo carboxylic acids via decarboxylative coupling reaction. The target products could be obtained in moderate to high yields.
Metal-free one-pot α -benzoxylation of benzylic alcohols with acids or aldehydes
作者:Yefu Zhu、Yong Zheng、Weibin Song、Bole Wei、Lijiang Xuan
DOI:10.1016/j.tetlet.2017.12.030
日期:2018.1
A metal-free strategy has been developed for α-benzoxylation of benzylic alcohols with acids or aldehydes. The reaction proceeds via sequential oxidation and α-benzoxylation in one pot. Importantly, the reactions are performed in metal-free condition and utilize cheap aqueous TBHP as an oxidant, affording α-benzoxy ketones in moderate to good yields.