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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
5-IODO-2-PYRROLIDIN-1YLPYRIDINE 5-IODO-2-PYRROLIDIN-1YLPYRIDINE 494771-62-9 C9H11IN2
5-bromopyridine-3,4-diamine 5-bromopyridine-3,4-diamine C5H6BrN3
Ethyl 6-bromo-7-methylimidazo[1,2-a]pyridine-2-carboxylate Ethyl 6-bromo-7-methylimidazo[1,2-a]pyridine-2-carboxylate 907945-87-3 C11H11BrN2O2
1-(4-Fluorophenyl)-2-oxo-1,2-dihydropyridine-4-carbonitrile 1-(4-Fluorophenyl)-2-oxo-1,2-dihydropyridine-4-carbonitrile 929000-78-2 C12H7FN2O
4-HYDROXY-NICOTINIC ACID ETHYL ESTER 4-HYDROXY-NICOTINIC ACID ETHYL ESTER 57905-31-4 C8H9NO3
Dorastine Dorastine 21228-13-7 C20H22ClN3
2-Pyridinecarbonitrile,5-(aminomethyl)-(9CI) 2-Pyridinecarbonitrile,5-(aminomethyl)-(9CI) 181130-14-3 C7H7N3
3-Amino-2-picoline 3-Amino-2-picoline C6H8N2
2-Hydroxy-3-Amino-5-Nitropyridine 2-Hydroxy-3-Amino-5-Nitropyridine 5667-38-9 C5H5N3O3
Pyridine, 2-ethynyl-5-methyl-, 1-oxide (9CI) Pyridine, 2-ethynyl-5-methyl-, 1-oxide (9CI) 499187-53-0 C8H7NO
2-Chloro-5-ethynylpyridine 2-Chloro-5-ethynylpyridine 263012-63-1 C7H4ClN
5-(4-Methoxyphenyl)-2-pyridinaMine 5-(4-Methoxyphenyl)-2-pyridinaMine 503536-75-2 C12H12N2O
2(1H)-Pyridinone,5-methoxy-(9CI) 2(1H)-Pyridinone,5-methoxy-(9CI) 61941-79-5 C6H7NO2
4-Pyridinamine,2,3,6-trifluoro-(9CI) 4-Pyridinamine,2,3,6-trifluoro-(9CI) 63489-55-4 C5H3F3N2
4-CYANO-2-IODOPYRIDINE 4-CYANO-2-IODOPYRIDINE 114821-24-8 C6H3IN2
(4-METHYLPYRIDIN-3-YL)METHANOL (4-METHYLPYRIDIN-3-YL)METHANOL 4664-27-1 C7H9NO
3-BROMO-5-(METHYLTHIO)PYRIDINE 3-BROMO-5-(METHYLTHIO)PYRIDINE 142137-18-6 C6H6BrNS
6-FLUOROPYRIDO[3,4-D]PYRIMIDIN-4-OL 6-FLUOROPYRIDO[3,4-D]PYRIMIDIN-4-OL 171178-44-2 C7H4FN3O
3-Cyano-4-trifluoromethyl-6-(4''-bromophenyl)pyridine-2-one 3-Cyano-4-trifluoromethyl-6-(4''-bromophenyl)pyridine-2-one 32801-22-2 C13H6BrF3N2O
1-(3-CHLOROPYRIDIN-2-YL)PIPERAZINE 1-(3-CHLOROPYRIDIN-2-YL)PIPERAZINE C9H12ClN3
2-Chloro-3-nitropyridine-6-amine 2-Chloro-3-nitropyridine-6-amine 84487-03-6 C5H4ClN3O2
4-AMINO-5-IODOPYRIDINE-3-CARBOXALDEHYDE 4-AMINO-5-IODOPYRIDINE-3-CARBOXALDEHYDE 902837-57-4 C6H5IN2O
6-METHYL-2,2'-BIPYRIDINE 6-METHYL-2,2'-BIPYRIDINE 56100-22-2 C11H10N2
5-CHLORO-2-(CHLOROMETHYL)PYRIDINE 5-CHLORO-2-(CHLOROMETHYL)PYRIDINE 10177-24-9 C6H5Cl2N
(3-FLUOROPYRIDIN-4-YL)METHANAMINE (3-FLUOROPYRIDIN-4-YL)METHANAMINE 870063-62-0 C6H7FN2
6-Bromo-2-chloro-3-iodopyridine 6-Bromo-2-chloro-3-iodopyridine 1138444-17-3 C5H2BrClIN
1-[[[[2-[2-[2-[2-Methoxyethoxy]ethoxy]ethoxy]ethoxy]carbonyl]oxy]methyl]-4-[N'-cyano-N''-[6-[4-chlorophenoxy]hexyl]guanidino]pyridinium chloride 1-[[[[2-[2-[2-[2-Methoxyethoxy]ethoxy]ethoxy]ethoxy]carbonyl]oxy]methyl]-4-[N'-cyano-N''-[6-[4-chlorophenoxy]hexyl]guanidino]pyridinium chloride 432037-57-5 C30H43ClN5O8.Cl
5-((4-Ethylpiperazin-1-yl)methyl)pyridin-2-amine 5-((4-Ethylpiperazin-1-yl)methyl)pyridin-2-amine 1180132-17-5 C12H20N4
5-Methyl-3-nitro-2-pyridinecarbonitrile 5-Methyl-3-nitro-2-pyridinecarbonitrile 1089330-68-6 C7H5N3O2
2-Chloro-5-ethyl-pyridine 2-Chloro-5-ethyl-pyridine 90196-32-0 C7H8ClN
3-bromo-4-methylpicolinonitrile 3-bromo-4-methylpicolinonitrile 717843-45-3 C7H5BrN2
2-(5-bromopyridin-2-yl)-2-methylpropanenitrile 2-(5-bromopyridin-2-yl)-2-methylpropanenitrile 871239-58-6 C9H9BrN2
1-Boc-6-benzyloctahydropyrrolo[3,4-b]pyridine 1-Boc-6-benzyloctahydropyrrolo[3,4-b]pyridine 159877-35-7 C19H28N2O2
5-Chloro-4-iodo-2(1H)-pyridinone 5-Chloro-4-iodo-2(1H)-pyridinone 1125410-07-2 C5H3ClINO
(5-METHOXYPYRIDIN-2-YL)METHANOL (5-METHOXYPYRIDIN-2-YL)METHANOL 127978-70-5 C7H9NO2
5-FLUORO-4-FORMYL-2-METHOXYPYRIDINE 5-FLUORO-4-FORMYL-2-METHOXYPYRIDINE 884495-12-9 C7H6FNO2
5-(4-[2-(5-ETHYL-2-PYRIDYL)ETHOXY]BENZYL)-2-IMINO-4-THIAZOLIDINONE 5-(4-[2-(5-ETHYL-2-PYRIDYL)ETHOXY]BENZYL)-2-IMINO-4-THIAZOLIDINONE C19H21N3O2S
3-FLUORO-2-(4-MORPHOLINO)PYRIDINE 3-FLUORO-2-(4-MORPHOLINO)PYRIDINE 693235-16-4 C9H11FN2O
2-AMINO-3,5-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 2-AMINO-3,5-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 883498-68-8 C6H3F5N2
2,6-DICHLORO-5-FLUORONICOTINOYL CHLORIDE 2,6-DICHLORO-5-FLUORONICOTINOYL CHLORIDE 96568-02-4 C6HCl3FNO
5-FORMYL-2-ISOPROXYPYRIDINE 5-FORMYL-2-ISOPROXYPYRIDINE 884495-35-6 C9H11NO2
5-(tert-Butylcarbamoyl)pyridine-3-boronic acid 5-(tert-Butylcarbamoyl)pyridine-3-boronic acid 913835-99-1 C10H15BN2O3
5-BROMOPYRIDINE-3-SULPHONYL CHLORIDE HYDROCHLORIDE 95 5-BROMOPYRIDINE-3-SULPHONYL CHLORIDE HYDROCHLORIDE 95 913836-25-6 C5H4BrCl2NO2S
3-NITROPYRIDINE-2-SULFONIC ACID 3-NITROPYRIDINE-2-SULFONIC ACID 54247-50-6 C5H4N2O5S
2,6-DIHYDROXY-3-NITROPYRIDINE 2,6-DIHYDROXY-3-NITROPYRIDINE 16013-84-6 C5H4N2O4
3,5-DIMETHOXYPYRIDINE-4-CARBOXALDEHYDE 3,5-DIMETHOXYPYRIDINE-4-CARBOXALDEHYDE 204862-70-4 C8H9NO3
4-IODO-2-METHOXYPYRIDINE 4-IODO-2-METHOXYPYRIDINE C6H6INO
3,5-DINITROISONICOTINIC ACID 3,5-DINITROISONICOTINIC ACID 191017-95-5 C6H3N3O6
3-METHOXY-2-PYRIDINECARBOXYLIC ACID 3-METHOXY-2-PYRIDINECARBOXYLIC ACID 16478-52-7 C7H7NO3
4-ACETAMIDO-3-NITROPYRIDINE 4-ACETAMIDO-3-NITROPYRIDINE 79371-42-9 C7H7N3O3
3,4-DINITROPYRIDINE 3,4-DINITROPYRIDINE 14916-69-9 C5H3N3O4
2,5-DIBROMOPYRIDINE-3-BORONIC ACID PINACOL ESTER 2,5-DIBROMOPYRIDINE-3-BORONIC ACID PINACOL ESTER 852228-17-2 C11H14BBr2NO2
3-Chloro-2-mercapto-5-nitropyridine 3-Chloro-2-mercapto-5-nitropyridine 64007-60-9 C5H3ClN2O2S
3-Methyl-4-nitropyridine-2-carboxylic acid 3-Methyl-4-nitropyridine-2-carboxylic acid 30235-17-7 C7H6N2O4
3,4-Diamino-6-bromopyridine 3,4-Diamino-6-bromopyridine 1033203-41-6 C5H6BrN3
2-Amino-3,5-dinitro-6-methylpyridine 2-Amino-3,5-dinitro-6-methylpyridine 25864-34-0 C6H6N4O4
5-Iodopyridine-2-carboxylic acid 5-Iodopyridine-2-carboxylic acid 32046-43-8 C6H4INO2
2-TRIFLUOROMETHYL-3-CYANOPYRIDINE 2-TRIFLUOROMETHYL-3-CYANOPYRIDINE 870066-15-2 C7H3F3N2
Pyridine, 2-(1-chloroethyl)- (7CI,8CI,9CI) Pyridine, 2-(1-chloroethyl)- (7CI,8CI,9CI) 10445-92-8 C7H8ClN
Isoquinoline, 5-(bromomethyl)- (9CI) Isoquinoline, 5-(bromomethyl)- (9CI) 158654-74-1 C10H8BrN
2,6-Dimethyl-3-bromopyridine 2,6-Dimethyl-3-bromopyridine C7H8BrN
4-CHLORO-N,N-DIETHYL-PYRIDINE-2-CARBOXAMIDE 4-CHLORO-N,N-DIETHYL-PYRIDINE-2-CARBOXAMIDE 851903-41-8 C10H13ClN2O
2-Pyridinecarboxamide,3,5-difluoro-(9CI) 2-Pyridinecarboxamide,3,5-difluoro-(9CI) 745784-03-6 C6H4F2N2O
1H-Pyrrolo[3,2-b]pyridine-5-methanamine(9CI) 1H-Pyrrolo[3,2-b]pyridine-5-methanamine(9CI) 267876-26-6 C8H9N3
6-SULFOPICOLINIC ACID 6-SULFOPICOLINIC ACID 18616-02-9 C6H5NO5S
1-(4-Bromophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile 1-(4-Bromophenyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile 929000-84-0 C12H7BrN2O
4H-Pyrido[1,2-a]pyrimidin-4-one, 9-bromo-2-hydroxy-7-methyl- 4H-Pyrido[1,2-a]pyrimidin-4-one, 9-bromo-2-hydroxy-7-methyl- 663619-90-7 C9H7BrN2O2
2-Bromo-5-chloropyridine-4-carboxaldehyde 2-Bromo-5-chloropyridine-4-carboxaldehyde 921630-14-0 C6H3BrClNO
N-ETHYL-3-METHOXYPYRIDIN-2-AMINE N-ETHYL-3-METHOXYPYRIDIN-2-AMINE 912761-77-4 C8H12N2O
1-(3-CHLORO-2-PYRIDYL)HOMOPIPERAZINE 1-(3-CHLORO-2-PYRIDYL)HOMOPIPERAZINE 902837-06-3 C10H14ClN3
ethyl 1-((pyridin-4-yl)methyl) piperidine-4-carboxylate ethyl 1-((pyridin-4-yl)methyl) piperidine-4-carboxylate 138030-54-3 C14H20N2O2
6-(Benzyl-methylamino)pyridine-3-boronic acid pinacol ester 6-(Benzyl-methylamino)pyridine-3-boronic acid pinacol ester 1073354-30-9 C19H25BN2O2
5-(3-CHLOROPHENYL)-2-PYRIDINAMINE 5-(3-CHLOROPHENYL)-2-PYRIDINAMINE 893738-14-2 C11H9ClN2
1-(3-CHLORO-PYRIDIN-2-YL)-[1,4]DIAZEPANE 1-(3-CHLORO-PYRIDIN-2-YL)-[1,4]DIAZEPANE C10H14ClN3
7-benzyl-4-chloro-2-(methylthio)-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine 7-benzyl-4-chloro-2-(methylthio)-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine 859826-11-2 C15H16ClN3S
(2-PYRROLIDIN-1-YLPYRID-4-YL)METHYLAMINE (2-PYRROLIDIN-1-YLPYRID-4-YL)METHYLAMINE 876316-38-0 C10H15N3
3-(CYANOMETHYL)-5-METHOXY-1H-PYRROLO[2,3-C]PYRIDINE-2-CARBOXYLIC ACID 3-(CYANOMETHYL)-5-METHOXY-1H-PYRROLO[2,3-C]PYRIDINE-2-CARBOXYLIC ACID 22772-37-8 C11H9N3O3
(5-CYANO-PYRIDIN-2-YL)-CARBAMIC ACID TERT-BUTYL ESTER (5-CYANO-PYRIDIN-2-YL)-CARBAMIC ACID TERT-BUTYL ESTER C11H13N3O2
6-BROMO-2-PYRIDINEMETHANAMINE 6-BROMO-2-PYRIDINEMETHANAMINE 188637-63-0 C6H7BrN2
6-(DIMETHYLAMINO)NICOTINIC ACID 6-(DIMETHYLAMINO)NICOTINIC ACID 82846-28-4 C8H10N2O2
LY 272015 HYDROCHLORIDE LY 272015 HYDROCHLORIDE 172895-15-7 C21H25ClN2O2
5-IODO-1-METHYL-1H-PYRAZOLO[3,4-B] PYRIDIN-3-AMINE 5-IODO-1-METHYL-1H-PYRAZOLO[3,4-B] PYRIDIN-3-AMINE 766515-35-9 C7H7IN4
1-(5-NITROPYRIDIN-2-YL)ETHANONE 1-(5-NITROPYRIDIN-2-YL)ETHANONE 31557-75-2 C7H6N2O3
4-Amino-2-chloro-6-(trifluoromethyl)pyridine 4-Amino-2-chloro-6-(trifluoromethyl)pyridine 34486-22-1 C6H4ClF3N2
2-(Methylsulfonyl)-4-pyridinamine 2-(Methylsulfonyl)-4-pyridinamine 944401-88-1 C6H8N2O2S
3,4-Diamino-2-bromopyridine 3,4-Diamino-2-bromopyridine 189230-41-9 C5H6BrN3
2,3-Diamino-4,5-dichloropyridine 2,3-Diamino-4,5-dichloropyridine 662116-66-7 C5H5Cl2N3
3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinonitrile 3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinonitrile 1356066-65-3 C12H14BFN2O2
2-Amino-4-methylpyridin-3-ol 2-Amino-4-methylpyridin-3-ol 20348-18-9 C6H8N2O
3-bromo-2,4-dichloropyridine 3-bromo-2,4-dichloropyridine 144584-32-7 C5H2BrCl2N
(5-chloro-3-fluoropyridin-2-yl)MethanaMine hydrochloride (5-chloro-3-fluoropyridin-2-yl)MethanaMine hydrochloride 1257535-29-7 C6H7Cl2FN2
IMidazo[1,2-a]pyridine-3-carboxylic acid, 6-chloro- IMidazo[1,2-a]pyridine-3-carboxylic acid, 6-chloro- 138642-97-4 C8H5ClN2O2
4-NITROPYRIDINE-3-SULFONIC ACID 4-NITROPYRIDINE-3-SULFONIC ACID 33263-46-6 C5H4N2O5S
2-BROMONICOTINAMIDE 2-BROMONICOTINAMIDE 87674-18-8 C6H5BrN2O
4-BOC-1-(5-BROMO-2-PYRIDYL)PIPERAZINE 4-BOC-1-(5-BROMO-2-PYRIDYL)PIPERAZINE 153747-97-8 C14H20BrN3O2
2 6-DIMETHOXYPYRIDINE-3-CARBOXALDEHYDE& 2 6-DIMETHOXYPYRIDINE-3-CARBOXALDEHYDE& 58819-72-0 C8H9NO3
PYRIDINE-4-BORONIC ACID HYDROCHLORIDE PYRIDINE-4-BORONIC ACID HYDROCHLORIDE 913835-65-1 C5H7BClNO2
5-METHOXY-2-NITROPYRIDINE 5-METHOXY-2-NITROPYRIDINE 126739-64-8 C6H6N2O3
4-(DIMETHYLAMINO)-2,3,5,6-TETRAFLUOROPYRIDINE 4-(DIMETHYLAMINO)-2,3,5,6-TETRAFLUOROPYRIDINE 2875-13-0 C7H6F4N2
4,4'-DIPYRIDYL DIHYDROCHLORIDE 4,4'-DIPYRIDYL DIHYDROCHLORIDE 27926-72-3 C10H10Cl2N2
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