Synthesis of magnetic core@dual shells Fe 3 O 4 @ SiO 2 @ WO 3 nanocatalyst for olefin double bond oxidative cleavage

2020 ◽  
Author(s):  
Arnaud Gandon ◽  
Chinh‐Chien Nguyen ◽  
Serge Kaliaguine ◽  
Trong‐On Do
Keyword(s):  
Double Bond ◽  
Magnetic Core ◽  
Oxidative Cleavage

Preparation of New Oxidized 18-α-Oleanane Derivatives

2005 ◽  
Vol 70 (9) ◽  
pp. 1447-1464 ◽  
Author(s):  
Miroslav Kvasnica ◽  
Iva Tišlerová ◽  
Jan Šarek ◽  
Jan Sejbal ◽  
Ivana Císařová
Keyword(s):  
Double Bond ◽  
Nmr Spectra ◽  
Biological Activities ◽  
Oxidative Cleavage ◽  
Allylic Oxidation ◽  
Unsaturated Ketone ◽  
Ruthenium Tetroxide ◽  
Unsaturated Compounds ◽  
Starting Compound ◽  
C Nmr

19β,28-Epoxy-4,5-seco-3,5-cyclo-18α-olean-3(5)-ene (2) is an appropriate compound for oxidations, which lead to new oxidized compounds with potential biological activities. Several oxidations were used such as epoxidation, allylic oxidation, oxidative cleavage of double bond and other ones. From the starting compound epoxides 3a, 3b and unsaturated ketone 4 were prepared. This ketone was further oxidized to diketone 6 and anhydride 7. The double bonds of all unsaturated compounds were cleaved with ruthenium tetroxide to afford new A-seco oleananes. The structure and stereochemistry of the compounds were derived from IR, MS, 1H and 13C NMR spectra (1D and 2D COSY, TOCSY, NOESY, HSQC, HMBC).

Oxidative cleavage of propene on Ir(111): double-bond scission during the formation of acetate

1998 ◽  
Vol 398 (1-2) ◽  
pp. 11-27 ◽  
Author(s):  
S.G. Karseboom ◽  
J.E. Davis ◽  
C.B. Mullins
Keyword(s):  
Double Bond ◽  
Oxidative Cleavage ◽  
Bond Scission
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