Catalyzed oxidation reactions. 4. Picolinic acid catalysis of chromic acid oxidations

1977 ◽  
Vol 99 (23) ◽  
pp. 7622-7631 ◽  
Author(s):  
Jan Rocek ◽  
T. Y. Peng
Keyword(s):  
Acid Catalysis ◽  
Chromic Acid ◽  
Picolinic Acid ◽  
Oxidation Reactions ◽  
Catalyzed Oxidation

scholarly journals Active oxygen species in heterogeneously catalyzed oxidation reactions

2021 ◽  
Vol 614 ◽  
pp. 118057
Author(s):  
Olivia C. Williams ◽  
Carsten Sievers
Keyword(s):  
Active Oxygen Species ◽  
Active Oxygen ◽  
Oxygen Species ◽  
Oxidation Reactions ◽  
Catalyzed Oxidation

The mechanistic aspects of iron(III) porphyrin catalyzed oxidation reactions in mixed solvents

2011 ◽  
Vol 372 (1) ◽  
pp. 295-303 ◽  
Author(s):  
Amit Singh ◽  
Arunava Agarwala ◽  
Kaliappan Kamaraj ◽  
Debkumar Bandyopadhyay
Keyword(s):  
Mixed Solvents ◽  
Oxidation Reactions ◽  
Catalyzed Oxidation

SOME OXIDATION REACTIONS OF DELCOSINE

1957 ◽  
Vol 35 (4) ◽  
pp. 397-408 ◽  
Author(s):  
Ragini Anet ◽  
D. W. Clayton ◽  
Léo Marion
Keyword(s):  
Acetic Acid ◽  
Silver Oxide ◽  
Chromic Acid ◽  
Mercuric Acetate ◽  
Membered Ring ◽  
Oxidation Reactions ◽  
Ethyl Group ◽  
Compound C ◽  
Ring Oxidation ◽  
Group B

The alkaloid delcosine was oxidized by chromic acid in acetic acid, and also by the Oppenauer reaction, to dehydrodelcosine in which the carbonyl was shown by infrared absorption to be in a pentatomic ring. Oxidation of the alkaloid with silver oxide gave two products: (a) N-desethyldelcosine, which could be N-acetylated or converted back to the original base by ethylation, thus proving the presence of an N-ethyl group; (b) a compound, C24H37O7N, the properties of which agreed best with those of an internal ether, i.e., anhydrohydroxydelcosine. The action of N-bromosuccinimide on the alkaloid produced the same two compounds as silver oxide, plus a derivative, C22H33O7N, that proved to be N-desethyl-anhydrohydroxydelcosine. Potassium permanganate oxidized delcosine to a product, C22H31O7N, that had lost the N-ethyl group, contained the internal ether, and also a carbonyl in a five-membered ring. This same product was obtained on similar oxidation of N-desethyl-anhydrohydroxydelcosine. Oxidation of delcosine with mercuric acetate gave N-desethyldelcosine and N-desethyl-anhydrohydroxydelcosine, together with a compound that was very soluble in water and proved to be the carbinolamine formed by hydroxylation of the methylene in the N-ethyl group. These results are discussed in terms of a structure that is tentatively advanced for delcosine.

scholarly journals Substrate Conformation Correlates with the Outcome of Hyoscyamine 6β-Hydroxylase Catalyzed Oxidation Reactions

2018 ◽  
Vol 140 (24) ◽  
pp. 7433-7436 ◽  
Author(s):  
Richiro Ushimaru ◽  
Mark W. Ruszczycky ◽  
Wei-chen Chang ◽  
Feng Yan ◽  
Yung-nan Liu ◽  
...  
Keyword(s):  
Oxidation Reactions ◽  
Substrate Conformation ◽  
Catalyzed Oxidation
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