Pyridine compound

Pyridine compound is one of the most widely developed and used heterocyclic compound. As an important fine chemical raw material, its derivatives mainly include alkyl pyridine, halogenated pyridine, aminopyridine, bromo pyridine, picoline , iodine pyridine, chloropyridine, nitropyridine-hydroxypyridine, benzyl pyridine, ethyl pyridine, pyridine cyano, fluoro pyridine, dihydropyridine, etc., in which the pesticide accounts for about 50% of the total consumption of pyridine products, feed additive about 30% and  medicine and other areas 20%.

Pyridine is a colorless or slightly yellow liquid that has weak alkaline and special odor. It is an important chemical raw material and solvent, which naturally presents in coal tar, shale oil, gas and petroleum and is miscible with most of the water, alcohols, ethers, petroleum ether, oils, benzene, chloroform and other organic solvents.

The important derivatives of pyridine mainly include nicotinic acid, nicotinamide, isonicotinic hydrazide, nicotine, strychnine, and vitamin B6.

Pyridine has a close hexagonal structure that is similar to benzene. Because of the electron-withdrawing effect of the nitrogen atom in the ring, the electron density of 2,4,6 positions is less than that of 3,5 positions. In an acidic medium, electrophilic substitution reactions occur in the 3,5 positions and nucleophilic reactions, such as amination, alkylation, arylation, acylation, occur in the 2,4,6 positions. Pyridine is a weak tertiary amine, which can form different water-soluble salts with various acids (such as picric acid, perchloric acid or the like) in an ethanol solution. Due to the alkaline of pyridine, it can generate hydrochloride (C5H5N•HCl)with hydrochloric acid. In the effect of nickel catalyst at 200 ℃ and 15-30MPa, it can generate piperidine via hydrogenation or electrolysis reduction. The reduction of pyridine is easier than benzene, while the oxidation is more difficult than benzene. But we can oxidize pyridine by the catalysis of hydrogen peroxide or peroxy acids. N-pyridine oxide is an important pyridine derivative, which is easier for the happen of aryl group electrophilic substitution reaction because the oxidation of nitrogen atoms make the formation of positively charged pyridinium cation impossible. Electrophilic substitutions, such as pyridine nitration, sulfonation, halogenation, are relatively difficult, but the previous actions are slightly easier than halogenation. We can obtain 3,5-dichloro-pyridine or 3,4,5-trichloro pyridine via pyridine nitration and sulfonation at more than 200℃. Pyridine can form many crystalline complex compounds with various metal ions.

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Structure Chemical Name CAS MF
CHEMPACIFIC 38141 CHEMPACIFIC 38141 24103-75-1 C7H9NO
2-CHLORO-5-NITRONICOTINIC ACID METHYL ESTER 2-CHLORO-5-NITRONICOTINIC ACID METHYL ESTER 190271-88-6 C7H5ClN2O4
4-(CYCLOPROPYLAMINO)-3-NITROPYRIDINE 4-(CYCLOPROPYLAMINO)-3-NITROPYRIDINE 380605-28-7 C8H9N3O2
2-AMINO-3-(3-BROMOBENZYLAMINO)-PYRIDINE 2-AMINO-3-(3-BROMOBENZYLAMINO)-PYRIDINE 934537-52-7 C12H12BrN3
C-(4-Trifluoromethyl-pyridin-2-yl)-methylamine C-(4-Trifluoromethyl-pyridin-2-yl)-methylamine 872577-05-4 C7H7F3N2
ethyl 4-cyano-2-pyridinecarboxylate ethyl 4-cyano-2-pyridinecarboxylate 97316-50-2 C9H8N2O2
2,6-BIS[1-(2,6-DI-I-PROPYLPHENYLIMINO)ETHYL]PYRIDINE 2,6-BIS[1-(2,6-DI-I-PROPYLPHENYLIMINO)ETHYL]PYRIDINE 204203-14-5 C33H43N3
6-Chloro-3-fluoro-pyridine-2-carboxylic acid 6-Chloro-3-fluoro-pyridine-2-carboxylic acid 884494-76-2 C6H3ClFNO2
2,3,4,5-Tetrachloro-6-(trichloromethyl)pyridine 2,3,4,5-Tetrachloro-6-(trichloromethyl)pyridine 1134-04-9 C6Cl7N
2-(4-CHLOROPHENOXY)-5-NITROPYRIDINE 2-(4-CHLOROPHENOXY)-5-NITROPYRIDINE 28232-30-6 C11H7ClN2O3
3-AMINO-2,4-DIBROMO-5-FLUOROPYRIDINE 3-AMINO-2,4-DIBROMO-5-FLUOROPYRIDINE 884494-90-0 C5H3Br2FN2
2-BROMO-6-(1H-PYRAZOL-1-YL)PYRIDINE 2-BROMO-6-(1H-PYRAZOL-1-YL)PYRIDINE 123640-41-5 C8H6BrN3
3-iodopyridin-4-ol 3-iodopyridin-4-ol 89282-03-1 C5H4INO
2-(CYCLOPROPYLMETHOXY)-5-IODOPYRIDINE 2-(CYCLOPROPYLMETHOXY)-5-IODOPYRIDINE 902837-53-0 C9H10INO
2-BROMO-5-(TERT-BUTOXYCARBONYLAMINO)PYRIDINE 2-BROMO-5-(TERT-BUTOXYCARBONYLAMINO)PYRIDINE 218594-15-1 C10H13BrN2O2
Pyridoxal 5’-Phosphate Pyridoxal 5’-Phosphate 853645-22-4 C8H10NO6P
5-CHLORO-PYRIDINE-2-SULFONYL CHLORIDE 5-CHLORO-PYRIDINE-2-SULFONYL CHLORIDE 885277-08-7 C5H3Cl2NO2S
2-Pyridinecarboxylic  acid,5-(trifluoromethyl)-,ethyl  ester 2-Pyridinecarboxylic acid,5-(trifluoromethyl)-,ethyl ester 128072-94-6 C9H8F3NO2
4-(6-Bromo-pyridin-2-yl)-2-methyl-benzoicacid 4-(6-Bromo-pyridin-2-yl)-2-methyl-benzoicacid 1020718-62-0 C13H10BrNO2
3-AMINOIMIDAZO(1,2-A)PYRIDINE 3-AMINOIMIDAZO(1,2-A)PYRIDINE 28036-33-1 C7H7N3
2,6-DICHLORO-4-NITROPYRIDINE-N-OXIDE 2,6-DICHLORO-4-NITROPYRIDINE-N-OXIDE 2587-01-1 C5H2Cl2N2O3
3-BROMO-5-(CHLOROMETHYL)PYRIDINE HYDROCHLORIDE 3-BROMO-5-(CHLOROMETHYL)PYRIDINE HYDROCHLORIDE 39741-46-3 C6H5BrClN.ClH
3-Methoxy-6-Amino-2-Picoline 3-Methoxy-6-Amino-2-Picoline 52334-83-5 C7H10N2O
2-CYANO-3-PYRIDINECARBOXYLIC ACID METHYL ESTER 2-CYANO-3-PYRIDINECARBOXYLIC ACID METHYL ESTER 75358-89-3 C8H6N2O2
2H-Pyrano[3,2-b]pyridin-4-ol, 3,4-dihydro- (9CI) 2H-Pyrano[3,2-b]pyridin-4-ol, 3,4-dihydro- (9CI) 754149-09-2 C8H9NO2
1H-Pyrrolo[2,3-b]pyridine-2-carboxaldehyde (9CI) 1H-Pyrrolo[2,3-b]pyridine-2-carboxaldehyde (9CI) 394223-03-1 C8H6N2O
2-methylpyridine-3,4-diamine 2-methylpyridine-3,4-diamine 15931-19-8 C6H9N3
ethyl 2,6-dichloro-5-fluoropyridine-3-carboxylate ethyl 2,6-dichloro-5-fluoropyridine-3-carboxylate 82671-03-2 C8H6Cl2FNO2
6-Fluoro-4-methyl-pyridin-3-ylamine 6-Fluoro-4-methyl-pyridin-3-ylamine 954236-33-0 C6H7FN2
3-PICOLINE-4-BORONIC ACID 3-PICOLINE-4-BORONIC ACID C6H8BNO2
4-Bromopyridine N-Oxide 4-Bromopyridine N-Oxide 14248-50-1 C5H4BrNO
4-[2-(5-Ethyl-2-pyridinyl)ethoxy]benzyaldehyde 4-[2-(5-Ethyl-2-pyridinyl)ethoxy]benzyaldehyde 114393-97-4 C16H17NO2
(6-Bromo-pyridin-2-yl)-methyl-amine (6-Bromo-pyridin-2-yl)-methyl-amine 89026-79-9 C6H7BrN2
(2,6-DIMETHYLPYRIDIN-4-YL)METHANOL (2,6-DIMETHYLPYRIDIN-4-YL)METHANOL 18088-01-2 C8H11NO
2-Pyridinemethanamine,6-fluoro-(9CI) 2-Pyridinemethanamine,6-fluoro-(9CI) 205744-18-9 C6H7FN2
6-Methyl-3-pyridineethanol 6-Methyl-3-pyridineethanol 100189-17-1 C8H11NO
2-Pyridinecarboxylicacid,1,6-dihydro-3-methyl-6-oxo-(9CI) 2-Pyridinecarboxylicacid,1,6-dihydro-3-methyl-6-oxo-(9CI) 115185-81-4 C7H7NO3
4H-Pyrano[3,2-b]pyridin-4-one,2,3-dihydro-(9CI) 4H-Pyrano[3,2-b]pyridin-4-one,2,3-dihydro-(9CI) 405174-48-3 C8H7NO2
4-Pyridylamidoxime 4-Pyridylamidoxime 1594-57-6 C6H7N3O
4-methoxymethylpyridoxine 4-methoxymethylpyridoxine 1464-33-1 C9H13NO3
Methyl 2-amino-4-methylpyridine-3-carboxylate Methyl 2-amino-4-methylpyridine-3-carboxylate 76336-16-8 C8H10N2O2
2-Amino-5-bromo-4-methoxy-3-pyridinecarbonitrile 2-Amino-5-bromo-4-methoxy-3-pyridinecarbonitrile 951884-75-6 C7H6BrN3O
3-Bromo-2-fluoro-4-picoline 3-Bromo-2-fluoro-4-picoline 884495-46-9 C6H5BrFN
2-Amino-3-fluoro-5-(trifluoromethyl)pyridine 2-Amino-3-fluoro-5-(trifluoromethyl)pyridine 852062-17-0 C6H4F4N2
5-Methylpyridine-2,3-dicarboxylic acid 5-Methylpyridine-2,3-dicarboxylic acid 53636-65-0 C8H7NO4
2-Amino-3-nitro-5-trifluoromethylpyridine 2-Amino-3-nitro-5-trifluoromethylpyridine 53359-69-6 C6H4F3N3O2
3-Iodo-4-(trifluoromethyl)-pyridine 3-Iodo-4-(trifluoromethyl)-pyridine 625115-02-8 C6H3F3IN
2-BROMO-3-FLUORO-5-METHYLPYRIDINE 2-BROMO-3-FLUORO-5-METHYLPYRIDINE 34552-16-4 C6H5BrFN
2-Amino-5-bromo-3-benzloxypyridine 2-Amino-5-bromo-3-benzloxypyridine 754230-78-9 C12H11BrN2O
3-AMINO-2-(2,4-DIFLUOROPHENOXY)PYRIDINE 3-AMINO-2-(2,4-DIFLUOROPHENOXY)PYRIDINE 175135-63-4 C11H8F2N2O
6-CHLORO-3H-PYRIDO[3,4-D]PYRIMIDIN-4-ONE 6-CHLORO-3H-PYRIDO[3,4-D]PYRIMIDIN-4-ONE 171178-47-5 C7H4ClN3O
1-Benzyl-1,2,3,6-tetrahydropyridine-4-carboxylic acid 1-Benzyl-1,2,3,6-tetrahydropyridine-4-carboxylic acid 79858-48-3 C13H15NO2
2-BENZYLOXY-5-BROMO-6-METHYLPYRIDINE 2-BENZYLOXY-5-BROMO-6-METHYLPYRIDINE 126717-60-0 C13H12BrNO
5,8-dichloropyrido[2,3-d]pyridazine 5,8-dichloropyrido[2,3-d]pyridazine 703-33-3 C7H3Cl2N3
tert-Butyl 7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate tert-Butyl 7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate 192869-49-1 C12H17N3O2
2-Chloro-6-methyl-4-(trifluoromethyl)pyridine 2-Chloro-6-methyl-4-(trifluoromethyl)pyridine 22123-14-4 C7H5ClF3N
5-Fluoro-2-[[(1S)-1-(4-fluorophenyl)ethyl]amino]-6-[(5-methyl-1H-pyrazol-3-yl)amino]-3-pyridinecarbonitrile 5-Fluoro-2-[[(1S)-1-(4-fluorophenyl)ethyl]amino]-6-[(5-methyl-1H-pyrazol-3-yl)amino]-3-pyridinecarbonitrile 905586-69-8 C18H16F2N6
2-bromo-4-mehtoxyl-5-hydroxybenzoic acid 2-bromo-4-mehtoxyl-5-hydroxybenzoic acid 121936-68-3 C8H7BrO4
3-Bromo-1-[tris(1-methylethyl)silyl]-1H-pyrrolo[2,3-b]pyridine 3-Bromo-1-[tris(1-methylethyl)silyl]-1H-pyrrolo[2,3-b]pyridine 918525-02-7 C16H25BrN2Si
2-Methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)pyridine 2-Methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)pyridine 1150561-61-7 C13H17BF3NO3
6-Bromo-2-ethylaminopyridine,HCl 6-Bromo-2-ethylaminopyridine,HCl 724770-74-5 C7H9BrN2
2-Bromo-5-nitro-4-Pyridinecarboxylic acid 2-Bromo-5-nitro-4-Pyridinecarboxylic acid 1053655-82-5 C6H3BrN2O4
1-(4-iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one 1-(4-iodophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one 473927-69-4 C15H17IN2O2
6-Bromo-2-methylpyridine-3-carboxaldehyde 6-Bromo-2-methylpyridine-3-carboxaldehyde 926293-55-2 C7H6BrNO
1-(2-CHLORO-3-PYRIDINYL)-3,3-DIMETHYL-2-AZETANONE 1-(2-CHLORO-3-PYRIDINYL)-3,3-DIMETHYL-2-AZETANONE C10H11ClN2O
2-FORMYLPYRIDINE-5-BORONIC ACID PINACOLATE 2-FORMYLPYRIDINE-5-BORONIC ACID PINACOLATE 1073354-14-9 C12H16BNO3
2,4-DICHLOROPYRIDINE-5-BORONIC ACID HYDRATE 2,4-DICHLOROPYRIDINE-5-BORONIC ACID HYDRATE 1072952-26-1 C5H6BCl2NO3
4-HYDROXYTHIENO[2,3-B]PYRIDINE-5-CARBOXYLIC ACID ETHYL ESTER 4-HYDROXYTHIENO[2,3-B]PYRIDINE-5-CARBOXYLIC ACID ETHYL ESTER 55503-31-6 C10H9NO3S
5-HYDROXYPYRIDINE-3,4-DICARBOXYLIC ACID METHYL ESTER 5-HYDROXYPYRIDINE-3,4-DICARBOXYLIC ACID METHYL ESTER 243980-03-2 C8H7NO5
2,6-BIS(CHLOROMETHYL)PYRIDINE 2,6-BIS(CHLOROMETHYL)PYRIDINE 3099-28-3 C7H7Cl2N
PYRIDINE-2-BORONIC ACID DIMETHYL ESTER PYRIDINE-2-BORONIC ACID DIMETHYL ESTER 136805-54-4 C7H10BNO2
N-(5-BROMOPYRIDIN-2-YL)-2-CHLOROACETAMIDE N-(5-BROMOPYRIDIN-2-YL)-2-CHLOROACETAMIDE 141454-61-7 C7H6BrClN2O
2,6-DIAMINE-3,5-DIBROMOPYRIDINE 2,6-DIAMINE-3,5-DIBROMOPYRIDINE 76942-20-6 C5H5Br2N3
N,N-DIETHYL-N-[2-(2-PYRIDYL)ETHYL]AMINE N,N-DIETHYL-N-[2-(2-PYRIDYL)ETHYL]AMINE 25877-30-9 C11H18N2
3-BROMO-2-FLUORO-5-HYDROXYPYRIDINE 3-BROMO-2-FLUORO-5-HYDROXYPYRIDINE 186593-54-4 C5H3BrFNO
1-(5-BROMOPYRIMIDIN-2-YL)PIPERIDINE-4-CARBOXYLIC ACID 1-(5-BROMOPYRIMIDIN-2-YL)PIPERIDINE-4-CARBOXYLIC ACID 799283-92-4 C10H12BrN3O2
6-Bromo-3,4-dihydro-1H-[1,8]naphthyridin-2-one 6-Bromo-3,4-dihydro-1H-[1,8]naphthyridin-2-one 129686-16-4 C8H7BrN2O
DIETHYL 2-([(2-CHLORO-3-PYRIDYL)CARBONYL]AMINO)MALONATE DIETHYL 2-([(2-CHLORO-3-PYRIDYL)CARBONYL]AMINO)MALONATE 219793-85-8 C13H15ClN2O5
2-PICOLINE-5-BORONIC ACID HYDRATE 2-PICOLINE-5-BORONIC ACID HYDRATE 1072952-30-7 C6H10BNO3
3-AMINO-6-METHYLPYRIDIN-2-OL 3-AMINO-6-METHYLPYRIDIN-2-OL 52334-79-9 C6H8N2O
2-[2-(DIPHENYLPHOSPHINO)ETHYL]PYRIDINE 2-[2-(DIPHENYLPHOSPHINO)ETHYL]PYRIDINE 10150-27-3 C19H18NP
5-BROMO-2-CHLOROPYRIDIN-3-AMINE 5-BROMO-2-CHLOROPYRIDIN-3-AMINE C5H4BrClN2
5-TRIFLUOROMETHYL-2-PYRIDINESULFONYL CHLORIDE 5-TRIFLUOROMETHYL-2-PYRIDINESULFONYL CHLORIDE 174485-72-4 C6H3ClF3NO2S
2-BROMO-5-CHLOROPYRIDINE-4-BORONIC ACID 2-BROMO-5-CHLOROPYRIDINE-4-BORONIC ACID 1072952-51-2 C5H4BBrClNO2
3-CHLORO-4-FLUOROPYRIDINE 3-CHLORO-4-FLUOROPYRIDINE C5H3ClFN
2-MERCAPTO-5-METHYLPYRIDINE 2-MERCAPTO-5-METHYLPYRIDINE 18368-58-6 C6H7NS
PYRIDIN-2-YLMETHYL-HYDRAZINE PYRIDIN-2-YLMETHYL-HYDRAZINE 7112-37-0 C6H9N3
ETHYL VIOLOGEN DIPERCHLORATE ETHYL VIOLOGEN DIPERCHLORATE 36305-51-8 C14H18Cl2N2O8
2-PHENYLNICOTINIC ACID 2-PHENYLNICOTINIC ACID 33421-39-5 C12H9NO2
(4-CHLOROPYRIDIN-2-YL)METHANAMINE DIHYDROCHLORIDE (4-CHLOROPYRIDIN-2-YL)METHANAMINE DIHYDROCHLORIDE 114780-09-5 C6H8Cl2N2
7-IODO[1,2,4]TRIAZOLO[1,5-A]PYRIDINE 7-IODO[1,2,4]TRIAZOLO[1,5-A]PYRIDINE 690258-25-4 C6H4IN3
2-(DIMETHYLAMINO)NICOTINONITRILE 2-(DIMETHYLAMINO)NICOTINONITRILE 60138-76-3 C8H9N3
3,5-DICHLORO-4-NITROPYRIDINE 3,5-DICHLORO-4-NITROPYRIDINE 433294-98-5 C5H2Cl2N2O2
2-Bromo-5-Fluoro-3-Methylpyridine 2-Bromo-5-Fluoro-3-Methylpyridine C6H5BrFN
3-Amino-2,6-dibromo-5-ethoxypyridine 3-Amino-2,6-dibromo-5-ethoxypyridine 1000018-10-9 C7H8Br2N2O
3-Chloro-2-iodo-5-(trifluoromethyl)pyridine 3-Chloro-2-iodo-5-(trifluoromethyl)pyridine 134161-12-9 C6H2ClF3IN
2,3,4,5-Tetrafluoropyridine 2,3,4,5-Tetrafluoropyridine 3512-16-1 C5HF4N
6-FLUORO-3,4-PYRIDINEDIAMINE 6-FLUORO-3,4-PYRIDINEDIAMINE 212268-13-8 C5H6FN3
Carbamic acid, (2,6-dichloro-4-pyridinyl)-, 1,1-dimethylethyl ester (9CI) Carbamic acid, (2,6-dichloro-4-pyridinyl)-, 1,1-dimethylethyl ester (9CI) 501907-61-5 C10H12Cl2N2O2
Pyridine, 5-(chloromethyl)-2-(trifluoromethyl)- (9CI) Pyridine, 5-(chloromethyl)-2-(trifluoromethyl)- (9CI) 386715-33-9 C7H5ClF3N
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