Organocatalytic peroxidation of malonates, β-ketoesters, and cyanoacetic esters using n-Bu4NI/t-BuOOH-mediated intermolecular oxidative C(sp3)–O coupling
作者:Alexander O. Terent'ev、Alexander T. Zdvizhkov、Dmitri O. Levitsky、Fabrice Fleury、Roman A. Pototskiy、Alena N. Kulakova、Gennady I. Nikishin
DOI:10.1016/j.tet.2015.09.047
日期:2015.11
A new organocatalytic approach for the synthesis of peroxides based on CH activation of a sp(3)-hybridized carbon atom is reported. Peroxides were prepared in 31-89% yield by the reaction of malonates, beta-ketoesters, and cyanoacetic esters with a Bu4NI/tert-butyl hydroperoxide system. The formation of the expected hydroxylation products was not observed. In the discovered reaction, tert-butyl hydroperoxide plays a dual role by acting as the oxidant and the O-reagent for the C-O coupling. The synthesis can be scaled up to generate gram quantities of the target products. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of Asymmetric Peroxides: Transition Metal (Cu, Fe, Mn, Co) Catalyzed Peroxidation of β-Dicarbonyl Compounds with <i>tert</i>-Butyl Hydroperoxide
作者:Alexander O. Terent’ev、Dmitry A. Borisov、Ivan A. Yaremenko、Vladimir V. Chernyshev、Gennady I. Nikishin
DOI:10.1021/jo100793j
日期:2010.8.6
(Cu, Fe, Mn, Co) catalyzed peroxidation of β-dicarbonyl compounds at the α position by tert-butyl hydroperoxide was discovered. A selective, experimentally convenient, and gram-scale method was developed for the synthesis of α-peroxidated derivatives of β-diketones, β-keto esters, and diethyl malonate. Virtually stoichiometric (2−3/1) molar ratios of tert-butyl hydroperoxide and a dicarbonyl compound