1357077-29-2Relevant academic research and scientific papers
Preparation of a microsized cerium chloride-based catalyst and its application in the Michael addition of β-diketones to vinyl ketones
Terent'Ev, Alexander O.,Vil', Vera A.,Yaremenko, Ivan A.,Bityukov, Oleg V.,Levitsky, Dmitri O.,Chernyshev, Vladimir V.,Nikishin, Gennady I.,Fleury, Fabrice
, p. 1493 - 1502 (2014)
A facile method, which does not require special equipment, was developed for the preparation of microsized cerium chloride by the thermal treatment of CeCl3·7H2O or the evaporation of its alcoholic solutions. The way of the preparation of the cerium chloride-based catalyst plays a decisive role in its catalytic activity. This catalyst is efficient in the Michael addition of β-diketones to vinyl ketones giving β,δ-triketones.
Selective synthesis of cyclic peroxides from triketones and H 2O2
Terent'ev, Alexander O.,Yaremenko, Ivan A.,Chernyshev, Vladimir V.,Dembitsky, Valery M.,Nikishin, Gennady I.
experimental part, p. 1833 - 1842 (2012/04/04)
A method for the assembly of tricyclic structures containing the peroxide, monoperoxyacetal, and acetal moieties was developed based on the acid-catalyzed reaction of β,δ-triketones with H2O2. Tricyclic compounds are formed selectively in yields from 39% to 90% by the reactions with the use of large amounts of strong acids, such as H2SO 4, HClO4, or HBF4, which act both as the catalyst and as the co-solvent. The reaction is unusual in that, despite the diversity of possible peroxidation pathways giving cyclic compounds and oligomers, the reaction proceeds with high selectivity and produces tricyclic peroxides via the monoperoxidation of the carbonyl groups in the β-positions and the transformation of the δ-carbonyl group into the acetal one. The syntheses are scaled up to tens of grams, and the resulting peroxides can be easily isolated from the reaction mixture.
