scholarly journals A NEW ACID CATALYZED OXIDATION OF SOME ACETYLENIC COMPOUNDS WITH SELENIUM DIOXIDE

1972 ◽  
Vol 1 (3) ◽  
pp. 229-232 ◽  
Author(s):  
Noboru Sonoda ◽  
Yuji Yamamoto ◽  
Shinji Murai ◽  
Shigeru Tsutsumi
Keyword(s):  
Selenium Dioxide ◽  
Acid Catalyzed ◽  
Catalyzed Oxidation ◽  
Acetylenic Compounds

scholarly journals Acid-Catalyzed Oxidation of Olefins with Selenium Dioxide

1970 ◽  
Vol 43 (11) ◽  
pp. 3475-3479 ◽  
Author(s):  
Khan A. Javaid ◽  
Noboru Sonoda ◽  
Shigeru Tsutsumi
Keyword(s):  
Selenium Dioxide ◽  
Oxidation Of Olefins ◽  
Acid Catalyzed ◽  
Catalyzed Oxidation

Le dimère de la cis dihydroxy-5,6 cyclohexène-2 dione-1,4

1969 ◽  
Vol 47 (5) ◽  
pp. 733-737 ◽  
Author(s):  
J. Y. Savoie ◽  
P. Brassard
Keyword(s):  
Solid State ◽  
Sodium Chlorate ◽  
Osmic Acid ◽  
Acid Catalyzed ◽  
Catalyzed Oxidation

The osmic acid catalyzed oxidation of p-benzoquinone by sodium chlorate has long been recognized to yield a dimeric substance. By using progressively more vigorous conditions of acetylation, it has been possible to prepare from it three acetates corresponding to the dimer and to products of increasing degrees of dehydration and aromatization. The compounds have now been identified as the tetraacetates of 1,2,6,7-tetrahydroxydibenzo-p-dioxine (2a), of 2-oxo-1,4a (trans),6,7-tetrahydroxy-1,2,4a,10a-tetrahydrodibenzo-cis-p-dioxinne (3) and of the monohemiacetal dimer of cis-5,6-dihydroxycyclohex-2-ene-1,4-dione(4b). The structure of the dimer in the solid state and in solution is discussed.

Kinetics and Mechanism of Oxidation of Selenium(IV) by Permanganate Ion in Aqueous Perchlorate Solutions

1993 ◽  
Vol 58 (3) ◽  
pp. 538-546 ◽  
Author(s):  
Refat M. Hassan ◽  
Sahr A. El-Gaiar ◽  
Abd El-Hady M. El-Summan
Keyword(s):  
Reaction Mechanism ◽  
Reaction Rate ◽  
Oxidation Process ◽  
Selenium Dioxide ◽  
Order Reaction ◽  
Acid Solutions ◽  
First Order ◽  
Acid Catalyzed ◽  
Mechanism Of Oxidation ◽  
Kinetics Of

The kinetics of permanganate oxidation of selenium dioxide in perchloric acid solutions at a constant ionic strength of 2.0 mol dm-3 has been investigated spectrophotometrically. A first-order reaction in [MnO4-] and fractional order with respect to selenium(IV) were observed. The reaction rate was found to be pH-independent at lower acid concentrations ([H+] < 0.5 mol dm-3) and was acid-catalyzed beyond this range. Addition of Mn2+ and F- ions leads to the prediction that MnO4- is the sole reactive species in the oxidation process. A tentative reaction mechanism consistent with the reaction kinetics has been proposed.

Sulfamic Acid–Catalyzed Oxidation of Sulfides to Sulfoxides and Sulfones Using H2O2: Green and Chemoselective Method

2012 ◽  
Vol 42 (21) ◽  
pp. 3150-3156 ◽  
Author(s):  
Hadi Jafari ◽  
Amin Rostami ◽  
Firoz Ahmad-Jangi ◽  
Arash Ghorbani-Choghamarani
Keyword(s):  
Sulfamic Acid ◽  
Oxidation Of Sulfides ◽  
Acid Catalyzed ◽  
Catalyzed Oxidation

The acid-catalyzed oxido-reduction of spiroketals. Evidence for stereoelectronic control in hydride transfer to cyclic oxenium ions

1981 ◽  
Vol 59 (18) ◽  
pp. 2787-2802 ◽  
Author(s):  
Pierre Deslongchamps ◽  
Daryl D. Rowan ◽  
Normand Pothier
Keyword(s):  
Hydride Transfer ◽  
Reduction Reaction ◽  
Sodium Cyanoborohydride ◽  
Oxidation Reduction ◽  
Oxidation Reduction Reaction ◽  
Stereoelectronic Control ◽  
Acidic Conditions ◽  
Acid Catalyzed ◽  
Ether Ketone ◽  
Catalyzed Oxidation

Tricyclic spiroketal 1 undergoes an acid-catalyzed oxidation–reduction reaction which yields equatorial bicyclic ether aldehyde 5 specifically. Similarly, spiroketals 2, 3, and 4 give equatorial bicyclic ether ketone 12. These results are interpreted by invoking an internal hydride transfer from an alcohol function to a cyclic oxenium ion which takes place with stereoelectronic control. The reduction of tricyclic ketals 1 and 22 with sodium cyanoborohydride under acidic conditions is also reported.

Sign in / Sign up

Export Citation Format

Share Document