A convenient “one-pot” synthesis of epoxy alcohols via photooxygenation of olefins in the presence of titanium(IV) catalyst
作者:Waldemar Adam、Axel Griesbeck、Eugen Staab
DOI:10.1016/s0040-4039(00)84656-0
日期:1986.1
The ene reaction of singlet oxygen with alkenes in the presence of titanium alkoxides was employed to prepare epoxyalcohols in high diastereoselectivity; enantioselectivity could be achieved by use of diethyl tartrate as chiral auxiliary.
AbstractAn efficient and mild method for the allylic oxidation of cyclic alkenes employing molecular oxygen and tert-butyl hydroperoxide as the oxidant, copper-manganese oxides as heterogeneous catalyst under ambient temperature is proposed. The catalyst, which was prepared by co-precipitation and characterized, was evaluated oxidation of isolongifolene as a typical mode substrate. The catalyst showed
Mechanistic features of the semiconductor photocatalyzed olefin-to-carbonyl oxidative cleavage
作者:Marye Anne Fox、C. C. Chen
DOI:10.1021/ja00412a044
日期:1981.11
electron-transfer reactions was used to investigate the mechanism of the high-yield selective oxidation of organic olefins which occurs upon irradiation of platinized or metal-free TiO/sub 2/, ZnO, or CdS. Absence of an acceptable mechanism for the oxidation in homogeneous solution implies that the oxidations may occur at the catalyst surface, i.e., at the semiconductor-liquid junction interface. The
Carbon–carbon bond scission during the reactions of allylic hydroperoxides with some transition metal compounds. Results relevant to a recent proposal
作者:John L. Courtneidge
DOI:10.1039/c39920000381
日期:——
range of alternative copper and iron reagents and with the previously examined reagents in the presence or absence of suitable traps: an acid-catalysed pathway is proposed to account for the observed scission reaction.
Selective Allylic Oxidation of Terpenic Olefins Using Co-Ag Supported on SiO<sub>2</sub> as a Novel, Efficient, and Recyclable Catalyst
作者:Abderrazak Aberkouks、Ayoub Abdelkader Mekkaoui、Mustapha Ait Ali、Larbi El Firdoussi、Soufiane El Houssame
DOI:10.1155/2020/1241952
日期:2020.1.24
Co-Ag supported on the SiO2 catalyst was synthesized by the sol-gel method and characterized using XRD, FT-IR, TG-DTG, BET, CV, and SEM/EDX analysis. The catalytic performance of the resulting catalyst was examined by the oxidation of mono and sesquiterpenic olefinsusing hydrogen peroxide and tert-butyl peroxide as oxidant agents. Various parameters such as catalyst amount, temperature, and solvents