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3-Pyridinecarboxylic acid

The ultraviolet spectra of the pyridinecarboxylic acids (334) were initially interpreted assuming that the proportion of the zwitterion structure 335 was not appreciable,and the early pK work was inconclusive. However, Jaffe s calculations based on the Hammett equation indicated that about 95% of nicotinic and isonicotinic acids existed in the zwitterion form, and ultraviolet spectral data showed that the actual percentages of picolinic, nicotinic, and isonieotinie acids existing in the zwitterion form in aqueous solution are 94, 91, and 96%, respectively.This was later confirmed by Stephenson and Sponer, who further demonstrated that the proportion of the zwitterion form decreases in solvents of low dielectric constant, becoming very low in ethanol. Dipole moment data indicate that isonicotinic acid exists as such in dioxane, and 6-hydroxypyridine-3-carboxyiic acid has been shown to exist in form 336 u.sing pK data.  [Pg.435]

Dipping solution Dissolve 1 g isonicotinic acid hydrazide (4-pyridinecarboxylic acid hydrazide, isoniazide) in 100 ml ethanol and add 500 gl trifluoroacetic acid [1] or 1 ml glacial acetic acid. [Pg.318]

These considerations show that caution must be exercised in applying of the Hammett equation to systems which are known to involve tautomeric equilibria, e.g. the pyridinecarboxylic acids or y-hydroxypyridines. If in such systems the experimental p L "values are linear in a, there is at least a strong suggestion that Krp is insensitive to the nature of the substituents. Some applications of these ideas in the azobenzene series have proved of considerable interest. ... [Pg.261]

Synthesis of acylpyridines, pyridinecarboxylic acids and their derivatives 98KGS1013. [Pg.257]

Pyridine 210 is oxidized by 20% nitric acid at the acetyl group to 2-methyl-5-pyridinecarboxylic acid, while its ozonation gives cinchomeronic acid [pyridine-2,5-dicarboxylic acid (215)] (75DIS) which is decarboxylated (200°C, 2 h) to nicotinic acid 216 in 97% yield (75DIS). [Pg.212]

Hydrogenation of 3-pyridinecarboxylic acids is apt to be accompanied by extensive decarboxylation (2S), but this unwanted reaction can be prevented by carrying out the reaction in the presence of one equivalent of base (33,79). Ruthenium (33), rhodium (29), platinum oxide (2S,59), and palladium (30) have all proved effective catalysts for reduction of pyridinecarboxylic acids to the saturated acid. [Pg.137]

Chemical Name 3-pyridinecarboxylic acid aluminum salt Common Name Tris(nicotinato)aluminum Structural Formula ... [Pg.50]

Therapeutic Function Antidepressant monoamine oxidase inhibitor Chemical Name 4-Pyridinecarboxylic acid 2-(1-methylethyl)hydrazide Common Name —... [Pg.837]

Therapeutic Function Antitubercular Chemical Name 4-pyridinecarboxylic acid hydrazide Common Name Isonicotinic acid hydrazide Structural Formula ... [Pg.846]

Chemical Name 3-pyridinecarboxylic acid 2,2-bis[[(3-pyridinylcarbonyl)oxy] methyl]-1,3-propanediyl ester... [Pg.1071]

Chemicel Name 2-[ [3-(trifluoromethyl)phenyl] amino]-3-pyridinecarboxylic acid... [Pg.1077]

Niacin methyl ester nicometh 3-carbomethoxypyridine methyl 3-pyridinecarboxylate 3-pyridinecarboxylic acid methyl ester... [Pg.188]

RN 1976-28-9 MF CisHijAlNjO MW 393.29 EINECS 217-832-7 CN 3-pyridinecarboxylic acid aluminum salt... [Pg.75]

CN 3-pyridinecarboxylic acid 2-[2-(4-chlorophenoxy)-2-methyl-l-oxopropoxy]ethyl ester... [Pg.814]

CN ( )-cw-3-pyridinecarboxylic acid 2-oxo-l-phenyl-2-[(3,3,5-trimethylcyclohexyl)oxy]ethyl ester... [Pg.1325]

CN 4-pyridinecarboxylic acid 2-[3-oxo-3-[(phenylmethyl)amino]propyl]hydrazide... [Pg.1423]

RN 70-19-9 MF Ci.HijNOj MW 207.23 EINECS 200-727-5 CN 3-pyridinecarboxylic acid (tetrahydro-2-furanyl)methyl ester... [Pg.1430]

RN 2066-89-9 MF C7H7NO3 C,H,N30 MW 290.28 EINECS 218-183-2 CN 4-pyridinecarboxylic acid hydrazide mono(4-amino-2-hydroxybenzoate)... [Pg.1569]

CN 4-pyridinecarboxylic acid hydrazide, hydrazone with 0-2-deoxy-2-(methylamino)-a-L-glucopyranosyl-... [Pg.1906]

I CN 6-[(3,4-dihydro-4,4-dimethyl-2//-l-benzothiopyran-6-yl)ethynyl]-3-pyridinecarboxylic acid ethyl ester... [Pg.1973]

CN 3-pyridinecarboxylic acid compd. with 3,7-dihydro-7-[2-hydroxy-3-[(2-... [Pg.2184]

See other pages where 3-Pyridinecarboxylic acid is mentioned: [Pg.574]    [Pg.789]    [Pg.789]    [Pg.568]    [Pg.318]    [Pg.5]    [Pg.340]    [Pg.435]    [Pg.155]    [Pg.245]    [Pg.246]    [Pg.735]    [Pg.1002]    [Pg.1095]    [Pg.1105]    [Pg.1432]    [Pg.1432]    [Pg.1436]    [Pg.2339]    [Pg.2356]    [Pg.2379]    [Pg.2438]   
See also in sourсe #XX -- [ Pg.336 , Pg.435 ]

See also in sourсe #XX -- [ Pg.31 ]

See also in sourсe #XX -- [ Pg.160 ]

See also in sourсe #XX -- [ Pg.307 ]

See also in sourсe #XX -- [ Pg.1035 ]

See also in sourсe #XX -- [ Pg.450 ]

See also in sourсe #XX -- [ Pg.307 ]



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2- Methyl-5-pyridinecarboxylic acid

2-Pyridinecarboxylic acid Curtius reaction

2-Pyridinecarboxylic acid esters

2-Pyridinecarboxylic acid, reaction with

3- Pyridinecarboxylic acid, methyl ester

4-Pyridinecarboxylic acid hydrazide

4-Pyridinecarboxylic acid, 2,6-diphenylsynthesis via oxidative cleavage of alkenes

4-Pyridinecarboxylic acid, cobalt complexes

4-Pyridinecarboxylic acid, rhodium

4-Pyridinecarboxylic acid, rhodium complex

Pyridinecarboxylic acids and

Pyridinecarboxylic acids hydrogenation

Pyridinecarboxylic acids oxidation

Pyridinecarboxylic acids synthesis

Pyridinecarboxylic acids tautomerism

Pyridinecarboxylic acids, directed

Pyridinecarboxylic acids, reduction

Tetrahydro-methyl-pyridinecarboxylic acid

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