Microwave-Enhanced Coupling of Carboxylic Acids with Liquid Ketones and Cyclic Ethers Using Tetrabutylammonium Iodide/<i>t</i>-Butyl Hydroperoxide
作者:Pablo Macías-Benítez、F. Javier Moreno-Dorado、Francisco M. Guerra
DOI:10.1021/acs.joc.0c00519
日期:2020.5.1
The oxidative coupling of carboxylic acids with liquid ketones and cyclic ethers has been accomplished in minutes using t-butylhydroperoxide in the presence of tetrabutylammonium iodide under microwave irradiation in the absence of a solvent. In addition to drastically shortening the reaction times, the use of microwaves resulted, in general, in yields equal to or higher than those obtained by conventional
A practical and efficient construction of C–O bonds via oxidative cross-coupling reaction of aldehydes and ethers has been realized under open air. When 2 mol% copper was used as the catalyst, various α-acyloxy ethers were obtained with up to 93% isolated yield.
The copper-catalyzedformation of C–Obonds by oxidativecoupling of benzylicalcohols with ethers was realized in open air. A series of α-acyloxy ethers were obtained in good yields with aqueous tert-butyl hydroperoxide as the oxidant.
Hydroesterification and Difunctionalization of Olefins with <i>N</i>-Hydroxyphthalimide Esters
作者:Lingying Leng、Joseph M. Ready
DOI:10.1021/acscatal.1c03969
日期:2021.11.5
Irradiation of aryl esters of N-hydroxyphthalimides in the presence of unactivated olefins promotes a mild and regioselectivehydroesterification. Optimal results are obtained with the aid of fac-Ir(dFppy)3 in CH2Cl2. Terminal and 1,1-disubstituted olefins provide primary esters, and trisubstituted olefins provide secondary esters. The anti-Markovnikov selectivity is consistent with alkyl radical intermediates