IBX as a catalyst for dehydration of hydroperoxides: green entry to α,β-unsaturated ketones <i>via</i> oxygenative allylic transposition
作者:Tetsuya Kuga、Yusuke Sasano、Yoshiharu Iwabuchi
DOI:10.1039/c7cc08957k
日期:——
A catalytic transformation of allylic hydroperoxides into α,β-unsaturated carbonyl compounds using IBX as a dehydration catalyst is described. The combination of a singlet oxygen ene reaction and the IBX-catalyzed dehydration provides α,β-unsaturated carbonyl compounds from alkenes via oxygenativeallylictransposition with H2O as the only byproduct.
renewable olefin β‐pinene with molecular oxygen was experimentally and computationally investigated. Peroxyl radicals abstract weakly bonded allylic hydrogen atoms from the substrate, yielding allylic hydroperoxides (i.e., myrtenyl and pinocarvyl hydroperoxide). In addition, peroxyl radicals add to the CC bond of the substrate to form an epoxide. It was found that a relatively high peroxyl radical concentration
Schenck et al., Justus Liebigs Annalen der Chemie, 1953, vol. 584, p. 177,197
作者:Schenck et al.
DOI:——
日期:——
Selective C–H Allylic Oxygenation of Cycloalkenes and Terpenoids Photosensitized by [Cu(Xantphos)(neoc)]BF<sub>4</sub>
作者:Michael G. Kallitsakis、Dimitra K. Gioftsidou、Marina A. Tzani、Panagiotis A. Angaridis、Michael A. Terzidis、Ioannis N. Lykakis
DOI:10.1021/acs.joc.1c01591
日期:2021.10.1
We present herein for the first time the use of the [Cu(Xantphos)(neoc)]BF4 as a photocatalyst for the selective C–H allylic oxygenation of cycloalkenes into the corresponding allylic hydroperoxides or alcohols in the presence of molecular oxygen. The proposed methodology affords the products at good yields and has also been applied successfully to several bioactive terpenoids, such as geraniol, linalool
作者:Mohamed Elsherbini、Rudolf K. Allemann、Thomas Wirth
DOI:10.1002/chem.201903505
日期:2019.9.25
An operationally simple continuous flow generator of "dark" singletoxygen has been developed. The singletoxygen was efficiently reacted with several chemical traps to give the corresponding oxygenated products in high yields. The developed "dark" singletoxygen generator has been successfully applied in the synthesis of the antimalarial drug artemisinin.