Picolinic acid
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| Names | |
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| IUPAC name
pyridine-2-carboxylic acid
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| Identifiers | |
98-98-6  |
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| ChEBI | CHEBI:28747 |
| ChEMBL | ChEMBL72628 |
| ChemSpider | 993 |
| Jmol 3D model | Interactive image |
| PubChem | 1018 |
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| Properties | |
| C6H5NO2 | |
| Molar mass | 123.11 g·mol−1 |
| Appearance | White to tan crystalline solid |
| Melting point | 136 to 138 °C (277 to 280 °F; 409 to 411 K) |
| 887 g/L[1] | |
| Vapor pressure | {{{value}}} |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Picolinic acid is an organic compound with the formula C5H4N(CO2H). It is a derivative of pyridine with a carboxylic acid substituent at the 2-position. It is an isomer of nicotinic acid, which has the carboxyl side chain at the 3-position. It is a white solid that is soluble in water.
In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.[2]:495ff
Coordination chemistry
Picolinic acid is a bidentate chelating agent of elements such as chromium, zinc, manganese, copper, iron, and molybdenum in the human body.[1]:72 Many of its complexes are charge-neutral and thus lipophilic. After its role in absorption was discovered, zinc dipicolinate dietary supplements became popular as they were shown to be an effective means of introducing zinc into the body.[3]
Biosynthesis
Picolinic acid is a catabolite of the amino acid tryptophan through the kynurenine pathway.[1][4]
It is a precursor to the coenzyme NAD+.[3] In addition, it is suggested to assist in the absorption of zinc (II) ions and other divalent or trivalent ions through the small intestine.[5]
See also
References
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- ↑ Picolinic Acid chapter in Philip L. Fuchs. Handbook of Reagents for Organic Synthesis: Catalytic Oxidation Reagents. John Wiley & Sons, Jul 29, 2013 ISBN 9781118704820
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