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Pyridine derivatives

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The important pyridine derivatives include niacin, nicotinamide, isonicotinoylhydrazine, nicotine, strychnine, and vitamin B6.

Vitamin B6 is a class of tetrasubstituted pyridine derivatives with coenzyme function, used clinically for the treatment of vomiting of pregnancy, radioactive vomiting, isoniazid poisoning, seborrheic dermatitis and pellagra, etc.

Pyridine is a kind of colorless or slightly yellow liquid with an alkalescence and special odor, naturally present in coal tar, shale oil, coal gas and petroleum. Miscible with water, alcohols, ethers, petroleum ether, oils, benzene, chloroform and most of other organic solvents, pyridine is an important chemical raw materials and solvents.

Similar to benzene with the same electronic structure pyridine has an almost hexagonal structure. The electron density of 2, 4, 6 sites is lower than that of 3, 5 sites due to the electronic absorption of nitrogen atoms in the ring. Therefore, in an acidic medium, electrophilic substitution reactions occur in the 3,5 positions and nucleophilic reactions such as amination, alkylation, arylation, acylation occur on the 2,4,6 position. Pyridine is a weak tertiary amine that can generate water-insoluble salts with various acids such as picric acid and perchloric acid in an ethanol solution; and pyridine hydrochloride ( C5H5N • HCl) can be generated by hydrochloric acid with pyridine due to its alkalescence. Piperidine can be generated from the hydrogenation of pyridine under the catalysis of nickel at 200 ℃ and 15 ~ 30MPa, or from the electrolysis reduction. It's relatively easier to be reduced but more difficult to be oxidized than benzene. But it can be oxidized by hydrogen peroxide or peroxy acids to form pyridine N-oxide, which is an important pyridine derivative.  Pyridine N-oxide can’t form a positively charged pyridinium cation after the oxidation of nitrogen atoms, which is therefore in favor of electrophilic substitution reaction of aryl group. Electrophilic substitution reactions of pyridine such as pyridine nitration, sulfonation and halogenation are difficult. But 3,5-dichloro-pyridine, or 3,4.5- trichloro pyridine can be obtained at more than 200 ℃ through halogenation which is slightly easier than the former two. Pyridine can form crystalline coordination compounds with various metal ions.

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Structure:
Chemical Name:
1H-Pyrrolo[2,3-b]pyridine-2-carboxaldehyde (9CI)
CAS:
394223-03-1
MF:
C8H6N2O
Structure:
Chemical Name:
3-AMINOIMIDAZO(1,2-A)PYRIDINE
CAS:
28036-33-1
MF:
C7H7N3
Structure:
Chemical Name:
2,6-DICHLORO-4-NITROPYRIDINE-N-OXIDE
CAS:
2587-01-1
MF:
C5H2Cl2N2O3
Structure:
Chemical Name:
6-Methyl-3-pyridineethanol
CAS:
100189-17-1
MF:
C8H11NO
Structure:
Chemical Name:
2-PHENYLNICOTINIC ACID
CAS:
33421-39-5
MF:
C12H9NO2
Structure:
Chemical Name:
7-IODO[1,2,4]TRIAZOLO[1,5-A]PYRIDINE
CAS:
690258-25-4
MF:
C6H4IN3
Structure:
Chemical Name:
2-BROMOPYRIDINE-4-N-METHYLCARBOXAMIDE
CAS:
337536-01-3
MF:
C7H7BrN2O
Structure:
Chemical Name:
1-(PYRIDIN-4-YL)-PIPERIDINE-4-CARBOXYLIC ACID
CAS:
93913-86-1
MF:
C11H14N2O2
Structure:
Chemical Name:
NICOTINANILIDE
CAS:
1752-96-1
MF:
C12H10N2O
Structure:
Chemical Name:
4'-(4-METHOXYPHENYL)-2,2':6',2''-TERPYRIDINE
CAS:
13104-56-8
MF:
C22H17N3O
Structure:
Chemical Name:
2-FLUORO-6-HYDROXYMETHYL PYRIDINE
CAS:
315180-17-7
MF:
C6H6FNO
Structure:
Chemical Name:
ETHYL IMIDAZO[1,2-A]PYRIDINE-7-CARBOXYLATE 98
CAS:
372147-49-4
MF:
C10H10N2O2
Structure:
Chemical Name:
Copper Pyrithione
CAS:
14915-37-8
MF:
C10H8CuN2O2S2
Structure:
Chemical Name:
2-AMINO-3,6-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE
CAS:
675602-89-8
MF:
C6H3F5N2
Structure:
Chemical Name:
2-Pyridylamid oxime
CAS:
1772-01-6
MF:
C6H7N3O
Structure:
Chemical Name:
6-METHYL-4-(TRIFLUOROMETHYL)-2(1H)-PYRIDONE
CAS:
22123-19-9
MF:
C7H6F3NO
Structure:
Chemical Name:
1H-Pyrrolo[3,2-c]pyridine, 6-methyl-
CAS:
183586-34-7
MF:
C8H8N2
Structure:
Chemical Name:
Ethyl 6-bromoimidazo[1,2-a]pyridine-2-carboxylate
CAS:
67625-37-0
MF:
C10H9BrN2O2
Structure:
Chemical Name:
PYRIDINE,3-CHLORO-5-ETHYNYL
CAS:
329202-22-4
MF:
C7H4ClN
Structure:
Chemical Name:
Pyridine, 2-fluoro-3-methoxy- (9CI)
CAS:
163234-74-0
MF:
C6H6FNO
Structure:
Chemical Name:
Cyclopropanamine, 1-(2-pyridinyl)- (9CI)
CAS:
503417-37-6
MF:
C8H10N2
Structure:
Chemical Name:
Pyridine, 2-(1-methylethyl)-5-nitro- (9CI)
CAS:
131941-21-4
MF:
C8H10N2O2
Structure:
Chemical Name:
Pyridine, 5-(chloromethyl)-2-methyl- (6CI,9CI)
CAS:
52426-66-1
MF:
C7H8ClN
Structure:
Chemical Name:
Pyridine, 5-ethynyl-2-methoxy- (9CI)
CAS:
663955-59-7
MF:
C8H7NO
Structure:
Chemical Name:
Pyridine, 2-fluoro-6-methoxy- (9CI)
CAS:
116241-61-3
MF:
C6H6FNO
Structure:
Chemical Name:
6-(2,2,2-TRIFLUOROETHOXY)NICOTINIC ACID
CAS:
175204-90-7
MF:
C8H6F3NO3
Structure:
Chemical Name:
2-amino-4-methoxypyridine-3-carbonitrile
CAS:
98651-70-8
MF:
C7H7N3O
Structure:
Chemical Name:
(S)-(-)-N-(5-NITRO-2-PYRIDYL)ALANINOL
CAS:
115416-52-9
MF:
C8H11N3O3
Structure:
Chemical Name:
5-BROMO-2-ETHYNYLPYRIDINE
CAS:
111770-86-6
MF:
C7H4BrN
Structure:
Chemical Name:
1-(5-Bromopyridin-2-yl)-1H-pyrazole
CAS:
433922-57-7
MF:
C8H6BrN3
Structure:
Chemical Name:
1H-Pyrrolo[3,2-b]pyridine,7-methoxy-(9CI)
CAS:
425380-39-8
MF:
C8H8N2O
Structure:
Chemical Name:
Furo[3,2-b]pyridin-3(2H)-one(9CI)
CAS:
119293-03-7
MF:
C7H5NO2
Structure:
Chemical Name:
3-Pyridinemethanol,2-methoxy-(9CI)
CAS:
112197-16-7
MF:
C7H9NO2
Structure:
Chemical Name:
3-Pyridinethiol,2-amino-(9CI)
CAS:
110402-20-5
MF:
C5H6N2S
Structure:
Chemical Name:
5H-Cyclopenta[b]pyridin-3-amine,6,7-dihydro-(9CI)
CAS:
178209-29-5
MF:
C8H10N2
Structure:
Chemical Name:
1H-Pyrrolo[2,3-c]pyridin-5-amine(9CI)
CAS:
174610-12-9
MF:
C7H7N3
Structure:
Chemical Name:
3-Pyridinemethanamine,6-methoxy-(9CI)
CAS:
262295-96-5
MF:
C7H10N2O
Structure:
Chemical Name:
3-Pyridinecarbonitrile,6-methoxy-2-methyl-(9CI)
CAS:
105277-11-0
MF:
C8H8N2O
Structure:
Chemical Name:
3-Pyridineacetonitrile,2-methyl-(6CI,9CI)
CAS:
101166-73-8
MF:
C8H8N2
Structure:
Chemical Name:
5-Bromo-2-iodo-4-picoline
CAS:
941294-57-1
MF:
C6H5BrIN
Structure:
Chemical Name:
Ethyl 6-methylimidazo[1,2-a]pyridine-2-carboxylate
CAS:
70705-30-5
MF:
C11H12N2O2
Structure:
Chemical Name:
4-IODO-2-PYRIDONE
CAS:
858839-90-4
MF:
C5H4INO
Structure:
Chemical Name:
6-Pyrrolidin-1-yl-nicotinic acid
CAS:
210963-95-4
MF:
C10H12N2O2
Structure:
Chemical Name:
4,4'-Dipyridyl hydrate
CAS:
123333-55-1
MF:
C10H10N2O
Structure:
Chemical Name:
5-Amino-2-ethoxypyridine
CAS:
52025-34-0
MF:
C7H10N2O
Structure:
Chemical Name:
3-(AMINOMETHYL)-6-(TRIFLUOROMETHYL)PYRIDINE
CAS:
388565-75-1
MF:
C12H13N3O2S
Structure:
Chemical Name:
2,6-Dichloroisonicotinamide
CAS:
89281-13-0
MF:
C6H4Cl2N2O
Structure:
Chemical Name:
3-BROMO-2-HYDRAZINO-5-NITROPYRIDINE
CAS:
15862-38-1
MF:
C5H5BrN4O2
Structure:
Chemical Name:
4-Amino-3-methoxypyridine
CAS:
52334-90-4
MF:
C6H8N2O
Structure:
Chemical Name:
3,4-Pyridinediamine,5-methyl-(9CI)
CAS:
13958-86-6
MF:
C6H9N3
Structure:
Chemical Name:
1H-Pyrazolo[4,3-b]pyridine,3-methyl-(9CI)
CAS:
194278-45-0
MF:
C7H7N3
Structure:
Chemical Name:
1H-Pyrrolo[2,3-c]pyridine,7-methoxy-(9CI)
CAS:
160590-40-9
MF:
C8H8N2O
Structure:
Chemical Name:
3-Quinolinamine,5,6,7,8-tetrahydro-(9CI)
CAS:
151224-99-6
MF:
C9H12N2
Structure:
Chemical Name:
3-Pyridinemethanamine,2-methoxy-(9CI)
CAS:
354824-19-4
MF:
C7H10N2O
Structure:
Chemical Name:
2-Pyridinecarboxylicacid,4-amino-,ethylester(9CI)
CAS:
773140-43-5
MF:
C8H10N2O2
Structure:
Chemical Name:
Methyl 1-(4-fluorophenyl)-6-oxo-1,6-dihydropyridine-3-carboxylate
CAS:
929000-81-7
MF:
C13H10FNO3
Structure:
Chemical Name:
2-Hydrazinyl-5-methyl-3-nitropyridine
CAS:
21901-25-7
MF:
C6H8N4O2
Structure:
Chemical Name:
3-AMINO-2-(2-FLUOROPHENOXY)PYRIDINE
CAS:
175135-66-7
MF:
C11H9FN2O
Structure:
Chemical Name:
2,3-DIAMINO-5-BROMO-6-METHYLPYRIDINE
CAS:
59352-90-8
MF:
C6H8BrN3
Structure:
Chemical Name:
Inabenfide
CAS:
82211-24-3
MF:
C19H15ClN2O2
Structure:
Chemical Name:
2-BENZYLOXY-NICOTINIC ACID
MF:
C13H11NO3
Structure:
Chemical Name:
METHYL 4-CHLOROPYRIDIN-2-YLCARBAMATE 97
CAS:
889676-38-4
MF:
C7H7ClN2O2
Structure:
Chemical Name:
2,3-CYCLOHEPTENOPYRIDINE
CAS:
7197-96-8
MF:
C10H13N
Structure:
Chemical Name:
2-PHENYL-NICOTINIC ACID METHYL ESTER
CAS:
188797-88-8
MF:
C13H11NO2
Structure:
Chemical Name:
2-FLUORO-4-PYRIDINEMETHANOL
CAS:
131747-60-9
MF:
C6H6FNO
Structure:
Chemical Name:
2-CHLORO-3-IODO-5-(TRIFLUOROMETHYL)PYRIDINE
CAS:
505084-56-0
MF:
C6H2ClF3IN
Structure:
Chemical Name:
Furo[2,3-c]pyridin-3(2H)-one (9CI)
CAS:
106531-52-6
MF:
C7H5NO2
Structure:
Chemical Name:
(6-methoxypyridin-2-yl)methanamine
CAS:
194658-13-4
MF:
C7H10N2O
Structure:
Chemical Name:
3-(aminomethyl)pyridin-4-amine
CAS:
158531-09-0
MF:
C6H9N3
Structure:
Chemical Name:
(5-Bromopicolinoyl)piperidine, (5-Bromopyridin-2-yl)(piperidin-1-yl)methanone
CAS:
934000-33-6
MF:
C11H13BrN2O
Structure:
Chemical Name:
3-Pyridinol,4-amino-6-chloro-(9CI)
CAS:
138084-65-8
MF:
C5H5ClN2O
Structure:
Chemical Name:
2-Pyridinemethanamine,3-chloro-(9CI)
CAS:
500305-98-6
MF:
C6H7ClN2
Structure:
Chemical Name:
1H-Pyrazolo[3,4-b]pyridine,4-methoxy-(9CI)
CAS:
119368-03-5
MF:
C7H7N3O
Structure:
Chemical Name:
6-Methyl-8-nitro-[1,2,4]triazolo[4,3-a]pyridine
CAS:
929000-70-4
MF:
C7H6N4O2
Structure:
Chemical Name:
8-Hydroxyimidazo[1,2-a]pyridine, HCl
CAS:
100592-11-8
MF:
C7H7ClN2O
Structure:
Chemical Name:
3-BENZOYL-2-PYRIDINECARBOXYLIC ACID
CAS:
64362-32-9
MF:
C13H9NO3
Structure:
Chemical Name:
3-AMINO-4-PHENYLPYRIDINE
CAS:
146140-99-0
MF:
C11H10N2
Structure:
Chemical Name:
2-(2-AMINOETHYLAMINO)-5-NITROPYRIDINE
CAS:
29602-39-9
MF:
C7H10N4O2
Structure:
Chemical Name:
5-BROMO-3-PYRIDINECARBOXYLIC ACID TERT-BUTYL ESTER
CAS:
263270-02-6
MF:
C10H12BrNO2
Structure:
Chemical Name:
2-ETHOXYNICOTINONITRILE 98%3-CYANO-2-ETHOXYPYRIDINE
CAS:
14248-71-6
MF:
C8H8N2O
Structure:
Chemical Name:
2-Amino-5-nitronicotinic acid
CAS:
6760-14-1
MF:
C6H5N3O4
Structure:
Chemical Name:
1H-PYRROLO[3,2-C]PYRIDINE-2-CARBALDEHYDE
CAS:
630395-95-8
MF:
C8H6N2O
Structure:
Chemical Name:
2-Amino-3-ethoxypyridine
CAS:
10006-74-3
MF:
C7H10N2O
Structure:
Chemical Name:
4-[(2-Chloropyridin-3-yl)sulphonyl]morpholine
CAS:
60597-72-0
MF:
C9H11ClN2O3S
Structure:
Chemical Name:
Benzeneacetic acid, 3-(3-pyridinyl)- (9CI)
CAS:
597584-62-8
MF:
C13H11NO2
Structure:
Chemical Name:
2-Fluoro-4-methylpyridine-5-carboxylic acid
CAS:
944582-95-0
MF:
C7H6FNO2
Structure:
Chemical Name:
5-Bromo-3-nitro-2-(1H-pyrazol-1-yl)pyridine 98%
CAS:
446284-40-8
MF:
C8H5BrN4O2
Structure:
Chemical Name:
3-Pyridinethiol,4-amino-(6CI,9CI)
CAS:
52334-54-0
MF:
C5H6N2S
Structure:
Chemical Name:
2,7-Naphthyridine(7CI,8CI,9CI)
CAS:
253-45-2
MF:
C8H6N2
Structure:
Chemical Name:
2-Pyridinecarbonitrile,5-formyl-(9CI)
CAS:
131747-68-7
MF:
C7H4N2O
Structure:
Chemical Name:
1H-Pyrrolo[2,3-c]pyridine,4-methoxy-(9CI)
CAS:
357263-40-2
MF:
C8H8N2O
Structure:
Chemical Name:
1-(4-Pyridinylmethyl)-4-piperidinemethanol
CAS:
914349-22-7
MF:
C12H18N2O
Structure:
Chemical Name:
4-Pyridinethiol,3-amino-(9CI)
CAS:
89002-13-1
MF:
C5H6N2S
Structure:
Chemical Name:
4-Chloro-6-(4-methyl-1H-imidazol-1-yl)pyrimidine
CAS:
941294-32-2
MF:
C8H7ClN4
Structure:
Chemical Name:
Ethyl 8-bromoimidazo[1,2-a]pyridine-6-carboxylate, HCl
CAS:
957062-60-1
MF:
C10H10BrClN2O2
Structure:
Chemical Name:
2,6-DICHLORO-4-ISOCYANATOPYRIDINE
CAS:
159178-03-7
MF:
C6H2Cl2N2O
Structure:
Chemical Name:
(2-CHLORO-6-ISOPROPYLPYRIDIN-3-YL)BORONIC ACID
CAS:
1003043-37-5
MF:
C8H11BClNO2
Structure:
Chemical Name:
4-(4-CHLOROPHENYL)-1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE
CAS:
51304-61-1
MF:
C11H13Cl2N
Structure:
Chemical Name:
6-Chloro-3-nitro-2-(trifluoromethyl)pyridine
CAS:
117519-12-7
MF:
C6H2ClF3N2O2
Structure:
Chemical Name:
5-BROMO-2-ETHOXYPYRIDIN-3-YLBORONIC ACID
CAS:
871332-98-8
MF:
C7H9BBrNO3