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Some substituted 2-pyridones form the dimer in solid state, for example the 5-methyl-3-carbonitrile-2-pyridone. The determination of all these structures was done by X-ray crystallography. In the solid state the hydrogen is located closer to the nitrogen so it could be considered to be right to call the colourless crystals in the flask 2-pyridone.
Whereas 2-pyridone (α) and 4-pyridone (γ) predominantly adopt the oxo form, the 3-pyridone (β) cannot, and instead adopts an equilibrium of the zwitterion form, pyridin-1-ium-3-olate, and the enol form, 3-hydroxypyridine (the canonical form). The 3-pyridone is not mesoionic. This property of 3-hydroxypyridine is leveraged in biology in ...
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[1] [2] The initial reaction product is a dihydropyridine which can be oxidized in a subsequent step to a pyridine. [3] The driving force for this second reaction step is aromatization. This reaction was reported in 1881 by Arthur Rudolf Hantzsch. A 1,4-dihydropyridine dicarboxylate is also called a 1,4-DHP compound or a Hantzsch ester.
Download as PDF; Printable version; In other projects ... This category has the following 2 subcategories, out of 2 total. P. ... Pyridone; A. Aurodox; S ...
Mineral salts pyridine broth is a selective medium for bacteria that can metabolize pyridine (which is an unusual carbon source that a select few types of bacteria can use). ). This medium is used to isolate bacteria belonging to the genus Arthrobacter among other bacteria g
Alkaloids with a pyridine partial structure are usually further subdivided according to their occurrence and their biogenetic origin. The most important examples of pyridine alkaloids are the nicotine and anabasine, which are found in tobacco, [2] the areca alkaloids in betel and ricinine in castor oil. [3]
The following other wikis use this file: Usage on bs.wikipedia.org Tautomer; Usage on cs.wikipedia.org 2-pyridon; Usage on de.wikipedia.org 2-Pyridon