Intramolecular reactions of azidoalkenes. The 2-(azidoalkyl)quinone rearrangement

1984 ◽  
Vol 49 (9) ◽  
pp. 1676-1678 ◽  
Author(s):  
Arthur G. Schultz ◽  
Wayne G. McMahon

The diquinones have been but little investigated, and as they contain two condensed highly active quinonid systems it is to be anticipated that they should be capable of interesting intramolecular reactions. When heated to 210-215º, 4 : 4'-dimethoxydiquinone is rapidly converted into a red crystalline isomeride (yield, 90%), soluble in alkali with an intense blue colour, and yielding a mono-acetate indicating the occurrence of a free hydroxyl group. Two hydrogen atoms are taken up on reduction, and the phenolic product yields a triacetate and a trimethyl ether. It follows that of the four carbonyl oxygens of 4 : 4'-dimethoxydiquinone, one has been converted into a hydroxyl group, and another which does not exhibit any functional activity, is probably present as ethereal oxygen. These results led to formula (III) as representing the product of rearrangement.


Inorganics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 79
Author(s):  
Fernanda Paiva Franguelli ◽  
Kende Attila Béres ◽  
Laszló Kótai

We reviewed the synthesis, structure, and properties of pyridine complexes of AgXO4 (X = Cl, Mn, and Re) compounds with various compositions ([AgPy2] XO4, [AgPy2XO4]·0.5Py, [AgPy4] XO4, and 4 [AgPy2XO4] [AgPy4] XO4). We also clarified the controversial information about the existence and composition of pyridine complexes of silver permanganate, used widely as mild and selective oxidants in organic chemistry. We discussed in detail the available structural and spectroscopic (IR, Raman, and UV) data and thermal behavior, including the existence and consequence of quasi-intramolecular reactions between the reducing ligand and anions containing oxygen.


ChemInform ◽  
2005 ◽  
Vol 36 (52) ◽  
Author(s):  
Henning Hopf

ChemInform ◽  
2010 ◽  
Vol 29 (16) ◽  
pp. no-no
Author(s):  
G. BROGGINI ◽  
G. MOLTENI ◽  
G. ZECCHI

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