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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
(S)-(-)-1-(4-PYRIDYL)ETHANOL (S)-(-)-1-(4-PYRIDYL)ETHANOL 54656-96-1 C7H9NO
3-CHLORO-2-FLUORO-5-HYDROXYPYRIDINE 3-CHLORO-2-FLUORO-5-HYDROXYPYRIDINE 209328-72-3 C5H3ClFNO
4-(PHENYLAMINO)PYRIDINE 4-(PHENYLAMINO)PYRIDINE 22961-45-1 C11H10N2
5-[N-(TERT-BUTOXYCARBONYL)AMINO]-2-CHLOROPYRIDINE 5-[N-(TERT-BUTOXYCARBONYL)AMINO]-2-CHLOROPYRIDINE 171178-45-3 C10H13ClN2O2
2-(ACETOXYMETHYL)4-(3-METHOXYPROPOXY)-3-METHYLPYRIDINE 2-(ACETOXYMETHYL)4-(3-METHOXYPROPOXY)-3-METHYLPYRIDINE 117977-19-2 C13H19NO4
6-Phenylpyridine-2-carboxylic acid 6-Phenylpyridine-2-carboxylic acid 39774-28-2 C12H9NO2
2-ACETAMIDO-4-METHYL-5-BROMOPYRIDINE 2-ACETAMIDO-4-METHYL-5-BROMOPYRIDINE 142404-82-8 C8H9BrN2O
2,5-DIHYDROXYPYRIDINE 2,5-DIHYDROXYPYRIDINE 5154-01-8 C5H5NO2
2-Pyridinamine, 5-bromo-4-chloro- 2-Pyridinamine, 5-bromo-4-chloro- 942947-94-6 C5H4BrClN2
DIETHYL 2,6-DIMETHYL-3,5-PYRIDINEDICARBOXYLATE DIETHYL 2,6-DIMETHYL-3,5-PYRIDINEDICARBOXYLATE 1149-24-2 C13H17NO4
5-BROMO-3-FLUORO-2-PYRIDINONE 5-BROMO-3-FLUORO-2-PYRIDINONE 156772-63-3 C5H3BrFNO
2-CHLORO-3-FLUORO-4-NITROPYRIDINE N-OXIDE 2-CHLORO-3-FLUORO-4-NITROPYRIDINE N-OXIDE 101664-56-6 C5H2ClFN2O3
4-FLUORONICOTINIC ACID 4-FLUORONICOTINIC ACID 152126-33-5 C6H4FNO2
3-METHOXYPYRIDINE 3-METHOXYPYRIDINE 7295-76-3 C6H7NO
3-Pyridinepropionic acid 3-Pyridinepropionic acid 3724-19-4 C8H9NO2
2',3',5',6'-TETRAHYDRO-1'H-[3,4']BIPYRIDINYL-4'-OL 2',3',5',6'-TETRAHYDRO-1'H-[3,4']BIPYRIDINYL-4'-OL 50461-59-1 C10H14N2O
5-CHLOROPYRIDINE-2-BORONIC ACID PINACOL ESTER 5-CHLOROPYRIDINE-2-BORONIC ACID PINACOL ESTER 652148-93-1 C11H15BClNO2
2-METHYL-6-(TRIFLUOROMETHYL)PYRIDINE-3-CARBONYL CHLORIDE 2-METHYL-6-(TRIFLUOROMETHYL)PYRIDINE-3-CARBONYL CHLORIDE 261635-98-7 C8H5ClF3NO
2-Chloro-5-nitronicotinic acid 2-Chloro-5-nitronicotinic acid 42959-38-6 C6H3ClN2O4
2-(P-NITROBENZYL)PYRIDINE 2-(P-NITROBENZYL)PYRIDINE 620-87-1 C12H10N2O2
2-CHLORO-5-FLUORO-3-(HYDROXYMETHYL)PYRIDINE 2-CHLORO-5-FLUORO-3-(HYDROXYMETHYL)PYRIDINE 870063-52-8 C6H5ClFNO
6-BENZYL-OCTAHYDRO-PYRROLO[3,4-B]PYRIDINE 6-BENZYL-OCTAHYDRO-PYRROLO[3,4-B]PYRIDINE 128740-14-7 C14H20N2
3-AMINO-PYRIDINE-2-CARBALDEHYDE 3-AMINO-PYRIDINE-2-CARBALDEHYDE 55234-58-7 C6H6N2O
2-BROMO-6-METHYL-4-TRIFLUOROMETHYLPYRIDINE 2-BROMO-6-METHYL-4-TRIFLUOROMETHYLPYRIDINE 451459-17-9 C7H5BrF3N
2-HYDRAZINO-5-METHYLPYRIDINE 2-HYDRAZINO-5-METHYLPYRIDINE 4931-01-5 C6H9N3
3-AMINO-7-AZAINDOLE 3-AMINO-7-AZAINDOLE 189882-31-3 C7H7N3
N-(CYANOMETHYL)PYRIDINIUM CHLORIDE N-(CYANOMETHYL)PYRIDINIUM CHLORIDE 17281-59-3 C7H7ClN2
METHYL 6-AMINO-5-BROMOPICOLINATE METHYL 6-AMINO-5-BROMOPICOLINATE 178876-82-9 C7H7BrN2O2
5-ISOCYANATO-2-METHYL-PYRIDINE 5-ISOCYANATO-2-METHYL-PYRIDINE 732245-99-7 C7H6N2O
2,3,6-TRICHLOROPYRIDINE 2,3,6-TRICHLOROPYRIDINE 6515-09-9 C5H2Cl3N
5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione 5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione 627502-58-3 C19H18N2O3S
(S)-(-)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE (S)-(-)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE 84249-39-8 C13H13N3O2
2-ACETAMIDO-5-PICOLINE 2-ACETAMIDO-5-PICOLINE 4931-47-9 C8H10N2O
2-FLUORO-4-HYDROXYPYRIDINE 2-FLUORO-4-HYDROXYPYRIDINE 22282-69-5 C5H4FNO
4-DIMETHYLAMINOPYRIDINIUM BROMIDE PERBROMIDE 4-DIMETHYLAMINOPYRIDINIUM BROMIDE PERBROMIDE 92976-81-3 C7H11Br3N2
2,3,6-TRIFLUOROISONICOTINIC ACID 2,3,6-TRIFLUOROISONICOTINIC ACID 675602-92-3 C6H2F3NO2
3-CHLORO-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXYLIC ACID 3-CHLORO-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXYLIC ACID 80194-68-9 C7H3ClF3NO2
(2-AMINO-5-IODO-PYRIDIN-3-YL)-METHANOL (2-AMINO-5-IODO-PYRIDIN-3-YL)-METHANOL 618107-90-7 C6H7IN2O
4-METHOXY-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER 4-METHOXY-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER 29681-43-4 C8H9NO3
6-(AMINOMETHYL)-2-PYRIDINE CARBOXYLIC ACID 6-(AMINOMETHYL)-2-PYRIDINE CARBOXYLIC ACID 160939-10-6 C8H10N2O2
1-ETHYL-3-METHYLPYRIDINIUM ETHYL SULFATE 1-ETHYL-3-METHYLPYRIDINIUM ETHYL SULFATE 872672-50-9 C10H17NO4S
3-AMINO-6-BROMO-2-CHLOROPYRIDINE 3-AMINO-6-BROMO-2-CHLOROPYRIDINE 169833-70-9 C5H4BrClN2
ETHYL 4-BROMO-3,5-DIMETHYL-1H-PYRROLE-2-CARBOXYLATE ETHYL 4-BROMO-3,5-DIMETHYL-1H-PYRROLE-2-CARBOXYLATE 368869-96-9 C11H9BrN2O
2-(2'-AMINOETHYL)-6-METHYLPYRIDINE 2-(2'-AMINOETHYL)-6-METHYLPYRIDINE 19363-94-1 C8H12N2
3-CHLORO-5-METHYLPYRIDINE 3-CHLORO-5-METHYLPYRIDINE 19230-55-8 C6H6ClN
4-Amino-3-pyridinesulfonamide 4-Amino-3-pyridinesulfonamide 75903-62-7 C5H7N3O2S
4-TERT-BUTYLPYRIDINE 4-TERT-BUTYLPYRIDINE 3978-81-2 C9H13N
(3,4-DIMETHOXY-BENZYL)-PYRIDIN-4-YLMETHYL-AMINE (3,4-DIMETHOXY-BENZYL)-PYRIDIN-4-YLMETHYL-AMINE 57342-20-8 C15H18N2O2
6-BROMO-2-METHOXY-3-NITRO-PYRIDINE 6-BROMO-2-METHOXY-3-NITRO-PYRIDINE 58819-77-5 C6H5BrN2O3
2,6-DIAMINO-4-METHYL PYRIDINE 2,6-DIAMINO-4-METHYL PYRIDINE 38439-33-7 C6H9N3
2,2,2-TRIFLUORO-1-PYRIDIN-2-YL-ETHYLAMINE 2,2,2-TRIFLUORO-1-PYRIDIN-2-YL-ETHYLAMINE 503173-14-6 C7H7F3N2
5-BROMO-2-FLUORO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 5-BROMO-2-FLUORO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 1073353-50-0 C11H14BBrFNO2
3-Ethyl-5-methyl-4-(2-chlorophenyl)-2-(2,2-diethoxy-ethoxymethyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate 3-Ethyl-5-methyl-4-(2-chlorophenyl)-2-(2,2-diethoxy-ethoxymethyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate 103094-30-0 C24H32ClNO7
5-BROMO-4-METHYL-PYRIDINE-2-CARBONITRILE 5-BROMO-4-METHYL-PYRIDINE-2-CARBONITRILE 886364-86-9 C7H5BrN2
2-CHLORO-3-FLUOROPYRIDINE-5-BORONIC ACID 2-CHLORO-3-FLUOROPYRIDINE-5-BORONIC ACID 1072946-66-7 C5H4BClFNO2
2-AMINO-3-CYANO-4-METHYLPYRIDINE 2-AMINO-3-CYANO-4-METHYLPYRIDINE 71493-76-0 C7H7N3
6-CHLORO-2-HYDROXYMETHYL PYRIDINE HYDROCHLORIDE 6-CHLORO-2-HYDROXYMETHYL PYRIDINE HYDROCHLORIDE 83782-89-2 C6H7Cl2NO
2-amino-6-methylpyridin-3-ol 2-amino-6-methylpyridin-3-ol 20348-16-7 C6H8N2O
4-Chloro-2,6-dimethyl-3-nitropyridine 4-Chloro-2,6-dimethyl-3-nitropyridine 15513-48-1 C7H7ClN2O2
5-BROMOPYRIDINE-3-CARBOHYDRAZIDE 5-BROMOPYRIDINE-3-CARBOHYDRAZIDE 112193-41-6 C6H6BrN3O
4-METHYL-7-AZAINDOLE 4-METHYL-7-AZAINDOLE 824-24-8 C8H8N2
5-Trifluoromethyl-pyridine-2-carboxylic acid methyl ester 5-Trifluoromethyl-pyridine-2-carboxylic acid methyl ester 124236-37-9 C8H6F3NO2
6-Bromopyridine-2-carboxamide 98% 6-Bromopyridine-2-carboxamide 98% 25194-52-9 C6H5BrN2O
1H-Imidazo[4,5-b]pyridine,5-bromo-(8CI) 1H-Imidazo[4,5-b]pyridine,5-bromo-(8CI) 28279-52-9 C6H4BrN3
2-(TERT-BUTOXYCARBONYLAMINO)PYRIDINE 2-(TERT-BUTOXYCARBONYLAMINO)PYRIDINE 38427-94-0 C10H14N2O2
4-HYDROXY-3-NITROPYRIDINE N-OXIDE 4-HYDROXY-3-NITROPYRIDINE N-OXIDE 31872-57-8 C5H4N2O4
2-Amino-5-bromoisonicotinic acid 2-Amino-5-bromoisonicotinic acid 1000339-23-0 C6H5BrN2O2
2-Picoline-5-boronic acid pinacolate 2-Picoline-5-boronic acid pinacolate 610768-32-6 C12H18BNO2
6-Chloro-3-formyl-2-picoline 6-Chloro-3-formyl-2-picoline 884495-36-7 C7H6ClNO
3-Amino-2-chloro-6-iodopyridine 3-Amino-2-chloro-6-iodopyridine 400777-06-2 C5H4ClIN2
4-Chloro-5-nitro-2-hydroxypyridine 4-Chloro-5-nitro-2-hydroxypyridine 850663-54-6 C5H3ClN2O3
1-(5-Nitro-2-pyridinyl)-4-piperidinol 1-(5-Nitro-2-pyridinyl)-4-piperidinol 353258-16-9 C10H13N3O3
5-Bromo-6-trifluoromethyl-pyridin-2-ylamine 5-Bromo-6-trifluoromethyl-pyridin-2-ylamine 882500-21-2 C6H4BrF3N2
6-NITRO-1H-PYRROLO[2,3-B]PYRIDINE 6-NITRO-1H-PYRROLO[2,3-B]PYRIDINE 145901-11-7 C7H7N3
6-METHYLPYRIDINE-3-CARBOTHIOAMIDE 6-METHYLPYRIDINE-3-CARBOTHIOAMIDE 175277-57-3 C7H8N2S
5-METHYL-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 5-METHYL-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 67625-35-8 C11H12N2O2
4-Bromo-pyridine-2-carboxylic acid ethyl ester 4-Bromo-pyridine-2-carboxylic acid ethyl ester 62150-47-4 C8H8BrNO2
2-BROMO-6-NITROPYRIDINE 2-BROMO-6-NITROPYRIDINE 21203-78-1 C5H3BrN2O2
2,6-Dimethoxypyridine-3-boronic acid 2,6-Dimethoxypyridine-3-boronic acid 221006-70-8 C7H10BNO4
3-Amino-2-bromo-5-methylpyridine 3-Amino-2-bromo-5-methylpyridine 34552-14-2 C6H7BrN2
2,3-Diamino-6-methoxypyridine 2,3-Diamino-6-methoxypyridine 28020-38-4 C6H9N3O
6-Aminopyridine-3-carboxamide 6-Aminopyridine-3-carboxamide 329-89-5 C6H7N3O
2-(DIFLUOROMETHOXY)BENZALDEHYDE 2-(DIFLUOROMETHOXY)BENZALDEHYDE 71653-64-0 C8H6F2O2
2,2-DIMETHYL-N-PYRIDIN-3-YL-PROPIONAMIDE 2,2-DIMETHYL-N-PYRIDIN-3-YL-PROPIONAMIDE 70298-88-3 C10H14N2O
5-ACETYL-6-METHYL-2-OXO-1,2-DIHYDROPYRIDINE-3-CARBONITRILE 5-ACETYL-6-METHYL-2-OXO-1,2-DIHYDROPYRIDINE-3-CARBONITRILE 52600-53-0 C9H8N2O2
1-(4-CHLORO-PYRIDIN-2-YL)-PIPERAZINE 1-(4-CHLORO-PYRIDIN-2-YL)-PIPERAZINE 885277-30-5 C9H12ClN3
4-[(4-CHLORO-2-PYRIMIDINYL)AMINO]BENZONITRILE 4-[(4-CHLORO-2-PYRIMIDINYL)AMINO]BENZONITRILE 244768-32-9 C11H7ClN4
5-CHLORO-2-METHYL-NICOTINIC ACID METHYL ESTER 5-CHLORO-2-METHYL-NICOTINIC ACID METHYL ESTER 350597-49-8 C8H8ClNO2
3,4-DIMETHOXY-2-METHYLPYRIDINE N-OXIDE 3,4-DIMETHOXY-2-METHYLPYRIDINE N-OXIDE 72830-07-0 C8H11NO3
2,2'-DIPYRIDYLAMINE 2,2'-DIPYRIDYLAMINE 1202-34-2 C10H9N3
GSK1904529A GSK1904529A 1089283-49-7 C44H47F2N9O5S
3-Bromo-4-methyl-5-nitropyridine 3-Bromo-4-methyl-5-nitropyridine 69872-15-7 C6H5BrN2O2
4-CHLORO-PYRIDINE-2-CARBOXYLIC ACID HYDRAZIDE 4-CHLORO-PYRIDINE-2-CARBOXYLIC ACID HYDRAZIDE 73771-11-6 C6H6ClN3O
2-(TRIFLUOROMETHYL)-PYRIDINE-4-CARBOXALDEHYDE 2-(TRIFLUOROMETHYL)-PYRIDINE-4-CARBOXALDEHYDE 108338-20-1 C7H4F3NO
Methyl 4-chloro-2-pyridinecarboxylate hydrochloride Methyl 4-chloro-2-pyridinecarboxylate hydrochloride 176977-85-8 C7H7Cl2NO2
2-Bromo-3-methoxy-6-methylpyridine 2-Bromo-3-methoxy-6-methylpyridine 24207-22-5 C7H8BrNO
4,5-DIAMINO-6-HYDROXYPYRIMIDINE SULFATE 4,5-DIAMINO-6-HYDROXYPYRIMIDINE SULFATE 52502-66-6 C4H8N4O5S
2-Cyanoethylpyridine 2-Cyanoethylpyridine 35549-47-4 C8H8N2
2-Amino-3-acetylpyridine 2-Amino-3-acetylpyridine 65326-33-2 C7H8N2O
2-HYDROXYMETHYL-3-METHYL-4-NITROPYRIDINE 2-HYDROXYMETHYL-3-METHYL-4-NITROPYRIDINE 168167-49-5 C7H8N2O3
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