Oxidative Transformation to Naphthodithiophene and Thia[7]helicenes by Intramolecular Scholl Reaction of Substituted 1,2-Bis(2-thienyl)benzene Precursors

2013 ◽  
Vol 78 (22) ◽  
pp. 11147-11154 ◽  
Author(s):  
Deepali Waghray ◽  
Christiaan de Vet ◽  
Konstantina Karypidou ◽  
Wim Dehaen
Keyword(s):  
Oxidative Transformation

THE INFLUENCE OF HAEMOGLOBIN-S AND G6PD DEFICIENCY ON THE ACTIVITY OF THE 17β-HYDROXYSTEROID DEHYDROGENASE OF INTACT HUMAN ERYTHROCYTES

1974 ◽  
Vol 75 (4) ◽  
pp. 793-800
Author(s):  
A. O. Sogbesan ◽  
O. A. Dada ◽  
B. Kwaku Adadevoh
Keyword(s):  
Enzyme Activity ◽  
Dehydrogenase Activity ◽  
Sex Steroids ◽  
G6pd Deficiency ◽  
Incubation Medium ◽  
Hydroxysteroid Dehydrogenase ◽  
G6pd Activity ◽  
Reverse Transformation ◽  
Oxidative Transformation ◽  
Haemoglobin S

ABSTRACT The 17β-hydroxysteroid dehydrogenase activity in intact erythrocytes of Nigerian patients, in particular with regard to haemoglobin genotypes and G6PD* activity was studied. The G6PD activity of the erythrocyte did not affect the oxidative transformation of testosterone to androstenedione and of oestradiol to oestrone. The reduction (reverse transformation) was inhibited in G6PD-deficient erythrocytes but this inhibition was offset by the addition of 0.025 m glucose to the incubation medium. The per cent oxidation transformation of testosterone was higher in Hb-AA than in Hb-SS erythrocytes. It is suggested that the differences may be a result of either lower enzyme activity in the Hb-SS erythrocytes or of differences in the uptake and possibly binding of sex steroids by intact Hb-SS and Hb-AA erythrocytes.

Sterically Crowded Heterocycles. X. A New Mechanistic Approach to the Ferricyanide Oxidation of 4,6'-Disubstituted 1-(Pyridin-2'-yl)-2,6-diphenylpyridinium Salts

1999 ◽  
Vol 64 (8) ◽  
pp. 1274-1294 ◽  
Author(s):  
Radek Pohl ◽  
Stanislav Böhm ◽  
Josef Kuthan
Keyword(s):  
Transition States ◽  
Oxidative Transformation ◽  
Steric Interactions ◽  
Radical Intermediates ◽  
Mechanistic Approach

The oxidations of the title perchlorates, bearing the sterically diverse 6'-substituents (H, Me, Et, i-Pr, n-Bu, t-Bu and Ph) in two series with the same 4-substituents (Ph and t-Bu) lead to pairs of isomeric 3',5-disubstituted (Z)-1'-phenyl-3'-(2-phenylimidazo[1,2-a]pyridin-3-yl)prop-2'- en-1'-ones and 3,6'-disubstituted [5-phenyl-1-(6'-pyridin-2'-yl)-1H-pyrrol-2-yl](phenyl)methanones except where the both variable substituents are t-Bu and then only pyrrolic product is formed. Considering steric interactions of the substituents in some intermediate and/or transition states a multistep mechanism for the oxidative transformation is proposed and supported by model PM3-PECI calculations of some radical intermediates.

Oxidative transformation of alcohols and organic halides in aqueous solution

2014 ◽  
Vol 38 (8) ◽  
pp. 3749-3754 ◽  
Author(s):  
Neeraj Gupta ◽  
Apoorva Thakur ◽  
Pushpa Bhardwaj
Keyword(s):  
Aqueous Solution ◽  
Oxidative Transformation ◽  
Organic Halides ◽  
Oxidation Of Alcohols

Using water as the only solvent for the oxidation of alcohols and organic halides, a complete solventless process for the preparation of water immiscible aldehydes has been developed.

The Oxidative Transformation of Coordinated Ligands

ChemInform ◽  
2005 ◽  
Vol 36 (27) ◽  
Author(s):  
A. A. Mejidov ◽  
V. G. Usatyuk ◽  
P. A. Fatullayeva
Keyword(s):  
Oxidative Transformation

Cu(ii) catalysed chemoselective oxidative transformation of thiourea to thioamidoguanidine/2-aminobenzothiazole

RSC Advances ◽  
2013 ◽  
Vol 3 (2) ◽  
pp. 438-446 ◽  
Author(s):  
Santosh K. Sahoo ◽  
Nilufa Khatun ◽  
Anupal Gogoi ◽  
Arghya Deb ◽  
Bhisma K. Patel
Keyword(s):  
Oxidative Transformation

The base-free and selective oxidative transformation of 1,3-propanediol into methyl esters by different Au/CeO2 catalysts

2011 ◽  
Vol 13 (10) ◽  
pp. 2690 ◽  
Author(s):  
Xiangwei Wang ◽  
Guoming Zhao ◽  
Huibin Zou ◽  
Yujin Cao ◽  
Yongguang Zhang ◽  
...  
Keyword(s):  
Methyl Esters ◽  
Oxidative Transformation
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