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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
3-FORMYL-2-PYRIDINECARBONITRILE 3-FORMYL-2-PYRIDINECARBONITRILE 131747-66-5 C7H4N2O
2,6-DIBROMO-3,5-DIFLUOROISONICOTINIC ACID 2,6-DIBROMO-3,5-DIFLUOROISONICOTINIC ACID 325461-60-7 C6HBr2F2NO2
N-HEXYLPYRIDINIUM BROMIDE N-HEXYLPYRIDINIUM BROMIDE 74440-81-6 C11H18BrN
2-MERCAPTO-4-METHYLNICOTINONITRILE 2-MERCAPTO-4-METHYLNICOTINONITRILE C7H6N2S
ACETIC ACID 2-CYANO-PYRIDIN-3-YLMETHYL ESTER ACETIC ACID 2-CYANO-PYRIDIN-3-YLMETHYL ESTER 131747-36-9 C9H8N2O2
4-Amino-3-bromo-2-hydroxypyridine 4-Amino-3-bromo-2-hydroxypyridine 107842-74-0 C5H5BrN2O
2-Cyano-3,6-dimethylpyridine 2-Cyano-3,6-dimethylpyridine 68164-77-2 C8H8N2
4-Chloro-pyridine-2-carbonyl chloride 4-Chloro-pyridine-2-carbonyl chloride 53750-66-6 C6H3Cl2NO
5-Amino-3-pyridinecarboxylic acid ethyl ester 5-Amino-3-pyridinecarboxylic acid ethyl ester 17285-76-6 C8H10N2O2
2(1H)-Pyridinone,6-(aminomethyl)-(9CI) 2(1H)-Pyridinone,6-(aminomethyl)-(9CI) 131052-62-5 C6H8N2O
2-(5-bromopyridin-2-yl)ethanol 2-(5-bromopyridin-2-yl)ethanol 1206968-77-5 C7H8BrNO
3-Azido-2-chloropyridine 3-Azido-2-chloropyridine 102934-51-0 C5H3ClN4
2-Pyridinecarboxylic  acid,4-(acetylamino)- 2-Pyridinecarboxylic acid,4-(acetylamino)- 84487-16-1 C8H8N2O3
2,3-Dibromo-5-pyridinecarboxaldehyde 2,3-Dibromo-5-pyridinecarboxaldehyde 1092349-81-9 C6H3Br2NO
2,6-Difluoro-3-cyanopyridine 2,6-Difluoro-3-cyanopyridine 869557-17-5 C6H2F2N2
PD 166285 PD 166285 212391-63-4 C26H29Cl4N5O2
1H-Pyrrolo[2,3-b]pyridine, 3-methyl-, 7-oxide (9CI) 1H-Pyrrolo[2,3-b]pyridine, 3-methyl-, 7-oxide (9CI) 688782-00-5 C8H8N2O
6-CHLORO-4-(TRIFLUOROMETHYL)NICOTINICACID
6-CHLORO-4-(TRIFLUOROMETHYL)NICOTINICACID 261635-77-2 C7H3ClF3NO2
3-Bromo-5-(methylsulphonyl)pyridine 3-Bromo-5-(methylsulphonyl)pyridine 445491-71-4 C6H6BrNO2S
2-Pyridinecarboxamide,5-fluoro-(9CI) 2-Pyridinecarboxamide,5-fluoro-(9CI) 499796-71-3 C6H5FN2O
2-Pyridinamine,3,6-dichloro-(9CI) 2-Pyridinamine,3,6-dichloro-(9CI) 313535-01-2 C5H4Cl2N2
4,6-DIMETHYLNICOTINIC ACID 4,6-DIMETHYLNICOTINIC ACID 22047-86-5 C8H9NO2
1-(4-Fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile 1-(4-Fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile 929000-74-8 C12H7FN2O
Ethyl 8-bromo-6-methylimidazo[1,2-a]pyridine-2-carboxylate Ethyl 8-bromo-6-methylimidazo[1,2-a]pyridine-2-carboxylate 847446-55-3 C11H11BrN2O2
4-Hydroxy-4-(6-methoxypyridin-3-yl)cyclohexanone 4-Hydroxy-4-(6-methoxypyridin-3-yl)cyclohexanone 708273-57-8 C12H15NO3
2-(CYCLOPENTYLOXY)-5-IODOPYRIDINE 2-(CYCLOPENTYLOXY)-5-IODOPYRIDINE 902837-58-5 C10H12INO
4-BROMO-5-FLUORO-2(1H)-PYRIDINONE 4-BROMO-5-FLUORO-2(1H)-PYRIDINONE 884495-01-6 C5H3BrFNO
2-BROMO-5-METHYL-4-NITROPYRIDINE 2-BROMO-5-METHYL-4-NITROPYRIDINE 66092-62-4 C6H5BrN2O2
5-(BROMOMETHYL)-2-FLUOROPYRIDINE 5-(BROMOMETHYL)-2-FLUOROPYRIDINE 105827-74-5 C6H5BrFN
2,6-DIMETHYLPYRIDINE-4-CARBOXYLIC ACID METHYL ESTER 2,6-DIMETHYLPYRIDINE-4-CARBOXYLIC ACID METHYL ESTER 142896-15-9 C9H11NO2
6-BROMO-IMIDAZO[1,2-A]PYRIDINE-3-CARBONITRILE 6-BROMO-IMIDAZO[1,2-A]PYRIDINE-3-CARBONITRILE 474708-98-0 C8H4BrN3
6-HYDROXY-PYRROLO[3,4-B]PYRIDINE-5,7-DIONE 6-HYDROXY-PYRROLO[3,4-B]PYRIDINE-5,7-DIONE 23439-87-4 C7H4N2O3
1,2-Dihydro-2-oxo-6-(trifluoromethyl)-3-pyridinecarboxylic acid ethyl ester 1,2-Dihydro-2-oxo-6-(trifluoromethyl)-3-pyridinecarboxylic acid ethyl ester 116548-02-8 C9H8F3NO3
tert-Butyl4-(3-cyano-2-pyridinyl)-1-piperazinecarboxylate tert-Butyl4-(3-cyano-2-pyridinyl)-1-piperazinecarboxylate 440100-15-2 C15H20N4O2
4-Bromo-2,5-dichloropyridine 4-Bromo-2,5-dichloropyridine 1184917-16-5 C5H2BrCl2N
4-Fluoropicolinamide 4-Fluoropicolinamide 1172938-55-4 C6H5FN2O
5-Bromo-2,3-dimethoxypyridine 5-Bromo-2,3-dimethoxypyridine 52605-98-8 C7H8BrNO2
4-Chloro-5-fluoro-1-[tris(1-methylethyl)silyl]-1H-pyrrolo[2,3-b]pyridine 4-Chloro-5-fluoro-1-[tris(1-methylethyl)silyl]-1H-pyrrolo[2,3-b]pyridine 685513-94-4 C16H24ClFN2Si
2-Bromo-5,6-dimethoxy-3-nitropyridine 2-Bromo-5,6-dimethoxy-3-nitropyridine 79491-48-8 C7H7BrN2O4
3,5-Dichloro-2-nitropyridine 3,5-Dichloro-2-nitropyridine 610278-88-1 C5H2Cl2N2O2
2,6-Difluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2,6-Difluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1204333-58-3 C11H14BF2NO2
CYT997 CYT997 917111-44-5 C24H30N6O2
methyl 4-bromo-6-chloropicolinate methyl 4-bromo-6-chloropicolinate 1206249-86-6 C7H5BrClNO2
4-bromo-2-methoxy-3-methyl- Suppliers 4-bromo-2-methoxy-3-methyl- Suppliers 112197-12-3 C7H8BrNO
2-(2-BroMophenyl)pyridine 2-(2-BroMophenyl)pyridine 109306-86-7 C11H8BrN
3-AMino-5-hydroxypyridine Dihydrochloride 3-AMino-5-hydroxypyridine Dihydrochloride 1186663-39-7 C5H7ClN2O
1-(2-CHLORO-PYRIDIN-4-YL)-PIPERAZINE 1-(2-CHLORO-PYRIDIN-4-YL)-PIPERAZINE 854159-45-8 C9H12ClN3
2-HYDROXYPYRIDINE-3-SULFONIC ACID 2-HYDROXYPYRIDINE-3-SULFONIC ACID 6684-45-3 C5H5NO4S
4-BENZYLOXY-2-HYDROXYPYRIDINE 4-BENZYLOXY-2-HYDROXYPYRIDINE C12H11NO2
1-BENZYL-2-OXO-1,2-DIHYDROPYRIDINE-4-CARBOXYLIC ACID 1-BENZYL-2-OXO-1,2-DIHYDROPYRIDINE-4-CARBOXYLIC ACID 63987-74-6 C13H11NO3
(4-AMINO-6-HYDROXY-PYRIMIDIN-2-YLSULFANYL)-ACETIC ACID (4-AMINO-6-HYDROXY-PYRIMIDIN-2-YLSULFANYL)-ACETIC ACID 66902-63-4 C6H7N3O3S
5-NITROPYRIDINE-2-SULFONIC ACID 5-NITROPYRIDINE-2-SULFONIC ACID 465529-94-6 C5H4N2O5S
3,6-DIIODOPYRIDINE-2-CARBONITRILE 3,6-DIIODOPYRIDINE-2-CARBONITRILE 827616-53-5 C6H2I2N2
6-HYDROXYMETHYL-PYRIDINE-2-CARBOXYLIC ACID 6-HYDROXYMETHYL-PYRIDINE-2-CARBOXYLIC ACID 1197-10-0 C7H7NO3
2-Chloro-5-bromopyridine-4-carboxylic acid 2-Chloro-5-bromopyridine-4-carboxylic acid C6H3BrClNO2
Methyl5-fluoro-6-methylpicolinate Methyl5-fluoro-6-methylpicolinate 1245647-61-3 C8H8FNO2
6-Hydroxymethyl-2-methyl-pyridin-3-ol 6-Hydroxymethyl-2-methyl-pyridin-3-ol 4811-16-9 C7H9NO2
3-chloro-4-methylpicolinonitrile 3-chloro-4-methylpicolinonitrile 1261868-97-6 C7H5ClN2
73583-41-2 73583-41-2 73583-41-2 C5H3BrClN
2-(Boc-amino)-5-cyanopyridine 2-(Boc-amino)-5-cyanopyridine 814263-30-4 C11H13N3O2
(6-Chloro-3-nitro-pyridin-2-yl)-acetonitrile (6-Chloro-3-nitro-pyridin-2-yl)-acetonitrile 123846-69-5 C7H4ClN3O2
2,3-dichloro-6-(trifluoroMethyl)-4-iodopyridine 2,3-dichloro-6-(trifluoroMethyl)-4-iodopyridine C6HCl2F3IN
Ethyl 2,5-dibroMopyridine-3-carboxylate Ethyl 2,5-dibroMopyridine-3-carboxylate 1214375-74-2 C8H7Br2NO2
2-Bromo-1-(6-chloropyridin-3-yl)-ethanone 2-Bromo-1-(6-chloropyridin-3-yl)-ethanone 23794-13-0 C7H5BrClNO
(1S,3S)-1-ETHYL-2,3,4,9-TETRAHYDRO-1H-PYRIDO[3,4-B]INDOLE-3-CARBOXYLIC ACID (1S,3S)-1-ETHYL-2,3,4,9-TETRAHYDRO-1H-PYRIDO[3,4-B]INDOLE-3-CARBOXYLIC ACID 134930-19-1 C14H16N2O2
6-METHYLPYRIDINE-2-SULFONIC ACID 6-METHYLPYRIDINE-2-SULFONIC ACID 18615-99-1 C6H7NO3S
5-HYDROXY-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER 5-HYDROXY-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER C7H7NO3
(4-METHYLPYRIDIN-3-YL)METHYLAMINE (4-METHYLPYRIDIN-3-YL)METHYLAMINE 1443-42-1 C7H10N2
2-NITRONICOTINIC ACID 2-NITRONICOTINIC ACID 33225-72-8 C6H4N2O4
NEOPYRITHIAMINE HYDROBROMIDE NEOPYRITHIAMINE HYDROBROMIDE 534-64-5 C14H20Br2N4O
4-BROMO-6-METHYLPYRIDIN-2-AMINE 4-BROMO-6-METHYLPYRIDIN-2-AMINE 524718-27-2 C6H7BrN2
6-ISOPROPYL-2-OXO-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID 6-ISOPROPYL-2-OXO-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID 98483-00-2 C9H11NO3
2-(2-HYDROXYETHYL)-3-METHYL-1-OXO-1,5-DIHYDROPYRIDO[1,2-A]BENZIMIDAZOLE-4-CARBONITRILE 2-(2-HYDROXYETHYL)-3-METHYL-1-OXO-1,5-DIHYDROPYRIDO[1,2-A]BENZIMIDAZOLE-4-CARBONITRILE 166671-26-7 C15H13N3O2
3-(Dimethylamino)-1-(pyridine-2-yl)prop-2-en-1-one 3-(Dimethylamino)-1-(pyridine-2-yl)prop-2-en-1-one 66521-54-8 C10H12N2O
2 6-DIPHENYLISONICOTINIC ACID  97 2 6-DIPHENYLISONICOTINIC ACID 97 38947-57-8 C18H13NO2
5-(METHYLTHIO)PYRIDIN-3-YLTHIOMETHYLBORONIC ACID 95 5-(METHYLTHIO)PYRIDIN-3-YLTHIOMETHYLBORONIC ACID 95 913835-66-2 C7H10BNO2S2
1-(3-PYRIDINYL)-2-HYDROXYETHYLAMINE, 1-(3-PYRIDINYL)-2-HYDROXYETHYLAMINE, 372144-01-9 C7H10N2O
N-(6-CHLORO-3-NITROPYRIDIN-2-YL)ACETAMIDE N-(6-CHLORO-3-NITROPYRIDIN-2-YL)ACETAMIDE 139086-97-8 C7H6ClN3O3
3-BROMO-5-(CHLOROMETHYL)PYRIDINE HYDROCHLORIDE 3-BROMO-5-(CHLOROMETHYL)PYRIDINE HYDROCHLORIDE C6H6BrCl2N
N-DODECYLPYRIDINIUM CHLORIDE MONOHYDRATE N-DODECYLPYRIDINIUM CHLORIDE MONOHYDRATE C17H32ClNO
4-CHLORO-3-PYRIDINESULFONIC ACID 4-CHLORO-3-PYRIDINESULFONIC ACID 51498-38-5 C5H4ClNO3S
TERT-BUTYL (2-[(3-IODOPYRIDIN-2-YL)THIO]ETHYL)CARBAMATE TERT-BUTYL (2-[(3-IODOPYRIDIN-2-YL)THIO]ETHYL)CARBAMATE 869567-97-5 C24H25BrN2O5
2,4-Dihydroxypyridine 2,4-Dihydroxypyridine 84719-31-3 C5H5NO2
2-CHLORO-5-IODONICOTINIC ACID 2-CHLORO-5-IODONICOTINIC ACID 59782-86-4 C6H3ClINO2
2-BROMO-3-METHOXYPYRIDINE-4-CARBOXALDEHYDE 2-BROMO-3-METHOXYPYRIDINE-4-CARBOXALDEHYDE 191418-78-7 C7H6BrNO2
3,5-DIFLUOROPYRIDINE-2-CARBOXYLIC ACID 3,5-DIFLUOROPYRIDINE-2-CARBOXYLIC ACID C6H3F2NO2
1-(6-CHLOROPYRIDIN-2-YL)ETHANONE 1-(6-CHLOROPYRIDIN-2-YL)ETHANONE 152356-57-5 C7H6ClNO
3-BROMOMETHYL-PYRIDINE-2-CARBONITRILE 3-BROMOMETHYL-PYRIDINE-2-CARBONITRILE 116986-13-1 C7H5BrN2
5-CHLORO-2-METHYL-PYRIDIN-4-YLAMINE 5-CHLORO-2-METHYL-PYRIDIN-4-YLAMINE 97944-44-0 C6H7ClN2
3-CYANO-2-(N-BUTYLAMINO)PYRIDINE 3-CYANO-2-(N-BUTYLAMINO)PYRIDINE 74611-50-0 C10H13N3
2-ethylisonicotinonitrile 2-ethylisonicotinonitrile 1531-18-6 C8H8N2
2-chloro-6-methylpyridin-3-ol 2-chloro-6-methylpyridin-3-ol 35680-24-1 C6H6ClNO
1,6-dihydro-4-hydroxy-2-methyl-6-oxonicotinonitrile 1,6-dihydro-4-hydroxy-2-methyl-6-oxonicotinonitrile 64169-92-2 C7H6N2O2
2,3,4,5-tetrachloropyridine 2,3,4,5-tetrachloropyridine 2808-86-8 C5HCl4N
6-Chloro-2-Fluoropyridine 6-Chloro-2-Fluoropyridine C5H3ClFN
2,6-Dibromopyridine-3-carboxaldehyde 2,6-Dibromopyridine-3-carboxaldehyde 55304-83-1 C6H3Br2NO
3-Bromo-2,5-lutidine 3-Bromo-2,5-lutidine 17117-19-0 C7H8BrN
4,6-Dihydroxy-5-nitropyridine-3-carboxylic acid ethyl ester 4,6-Dihydroxy-5-nitropyridine-3-carboxylic acid ethyl ester 6317-97-1 C8H8N2O6
5-Chloropyridine-2-carboxamide 5-Chloropyridine-2-carboxamide 370104-72-6 C6H5ClN2O
N,N-Di-Boc-2-aminopyridine, 97% N,N-Di-Boc-2-aminopyridine, 97% 870703-63-2 C15H22N2O4
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