作者:Indrek Reile、Anne Paju、Aleksander-Mati Müürisepp、Tõnis Pehk、Margus Lopp
DOI:10.1016/j.tet.2011.06.036
日期:2011.8
The asymmetric oxidation of 3-alkyl-cyclopentane-1,2-diones with the Ti((OPr)-Pr-i)(4)/tartaric ester/t-BuOOH complex, which gives, in a cascade process, highly enantiomerically enriched gamma-lactone acids, was studied by O-18 isotopic labeling in the substrate and in the oxidant. The path of the labeled atoms was followed by C-13 NMR spectroscopy. It was found that the oxidative ring cleavage of 1,2-dione proceeds via a Baeyer-Villiger-type oxidation mechanism. (C) 2011 Elsevier Ltd. All rights reserved.