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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
2(1H)-Pyridinethione,3-amino-(9CI) 2(1H)-Pyridinethione,3-amino-(9CI) 38240-21-0 C5H6N2S
5-Methylpyridin-3-amine hydrochloride 5-Methylpyridin-3-amine hydrochloride 957065-90-6 C6H9ClN2
2-Chloro-4-ethylpyridine 2-Chloro-4-ethylpyridine 40325-11-9 C7H8ClN
(4-BENZYLOXY-BENZYL)-PYRIDIN-2-YLMETHYL-AMINE (4-BENZYLOXY-BENZYL)-PYRIDIN-2-YLMETHYL-AMINE 680185-70-0 C20H20N2O
1,6-Naphthyridin-5(6H)-one,7,8-dihydro-(9CI) 1,6-Naphthyridin-5(6H)-one,7,8-dihydro-(9CI) 155058-02-9 C8H8N2O
6-(Methylamino)nicotinonitrile 6-(Methylamino)nicotinonitrile 261715-36-0 C7H7N3
7H-Pyrrolo[2,3-c]pyridin-7-one,1,6-dihydro-(9CI) 7H-Pyrrolo[2,3-c]pyridin-7-one,1,6-dihydro-(9CI) 259684-36-1 C7H6N2O
t-butyl 6-bromo-3-pyridinecarboxylate t-butyl 6-bromo-3-pyridinecarboxylate 941294-58-2 C10H12BrNO2
2-Chloro-3-fluoro-5-hydroxypyridine 2-Chloro-3-fluoro-5-hydroxypyridine 870062-76-3 C5H3ClFNO
5-Bromo-3-cyano-2-methoxypyridine 5-Bromo-3-cyano-2-methoxypyridine 941294-54-8 C7H5BrN2O
2-Amino-5-iodo-4-methylpyridine-3-carbonitrile 2-Amino-5-iodo-4-methylpyridine-3-carbonitrile 180995-02-2 C7H6IN3
TERT-BUTYL (5-FORMYLPYRIDIN-2-YL)CARBAMATE TERT-BUTYL (5-FORMYLPYRIDIN-2-YL)CARBAMATE 199296-40-7 C11H14N2O3
2-CHLORO-3-HYDROXY-5-PICOLINE 2-CHLORO-3-HYDROXY-5-PICOLINE 910649-59-1 C6H6ClNO
Pyridine-2,3,4-triamine Pyridine-2,3,4-triamine 52559-11-2 C5H8N4
Pyrido[3,4-d]pyrimidin-4(3H)-one (8CI,9CI) Pyrido[3,4-d]pyrimidin-4(3H)-one (8CI,9CI) 19178-25-7 C7H5N3O
Pyridine, 2-bromo-5-(bromomethyl)- (9CI) Pyridine, 2-bromo-5-(bromomethyl)- (9CI) 101990-45-8 C6H5Br2N
2-Pyridinamine, 6-chloro-5-methyl 2-Pyridinamine, 6-chloro-5-methyl 442129-37-5 C6H7ClN2
2,6-DINITRO-3-CHLOROPYRIDINE 2,6-DINITRO-3-CHLOROPYRIDINE 101079-67-8 C5H2ClN3O4
2,4-DICHLORO-3,5,6-TRIMETHYLPYRIDINE 2,4-DICHLORO-3,5,6-TRIMETHYLPYRIDINE 109371-17-7 C8H9Cl2N
(5-BROMO-PYRIDIN-3-YL)-ACETONITRILE (5-BROMO-PYRIDIN-3-YL)-ACETONITRILE 39891-08-2 C7H5BrN2
2,6-BIS(2-PYRIDYL)-4(1H)-PYRIDONE 2,6-BIS(2-PYRIDYL)-4(1H)-PYRIDONE 128143-88-4 C15H11N3O
3-AMINO-6-BROMO-PYRIDIN-2-OL 3-AMINO-6-BROMO-PYRIDIN-2-OL 134577-43-8 C5H5BrN2O
N2-CYCLOPROPYL-3-NITROPYRIDIN-2-AMINE N2-CYCLOPROPYL-3-NITROPYRIDIN-2-AMINE 290313-20-1 C8H9N3O2
2,4-DIIODOPYRIDINE-3-CARBONITRILE 2,4-DIIODOPYRIDINE-3-CARBONITRILE 827616-54-6 C6H2I2N2
2-AMINO-4-(1'HYDROXYETHYL)-PYRIDINE 2-AMINO-4-(1'HYDROXYETHYL)-PYRIDINE 885266-91-1 C7H10N2O
2,6-DIFLUORO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 2,6-DIFLUORO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 1072945-00-6 C11H14BF2NO2
2,4-DIFLUORO-5-IODO-PYRIDINE 2,4-DIFLUORO-5-IODO-PYRIDINE 837364-89-3 C5H2F2IN
4-(5-Methyl-2-pyridinyl)benzoic acid 4-(5-Methyl-2-pyridinyl)benzoic acid 845826-92-8 C13H11NO2
2-chloro-6-methoxypyridin-3-amine 2-chloro-6-methoxypyridin-3-amine 34392-85-3 C6H7ClN2O
3,5-dimethylpyridin-2-amine 3,5-dimethylpyridin-2-amine 41995-30-6 C7H10N2
3-Chloro-2-fluoropyridine-4-boronic acid 3-Chloro-2-fluoropyridine-4-boronic acid 1217500-55-4 C5H4BClFNO2
3-Bromopyridine-4-carboxamide 3-Bromopyridine-4-carboxamide 13958-99-1 C6H5BrN2O
3-Iodo-2-methylpyridine 3-Iodo-2-methylpyridine 15112-62-6 C6H6IN
4-Chloro-2,3-difluoropyridine 4-Chloro-2,3-difluoropyridine 851178-99-9 C5H2ClF2N
4-Chloropyridine-2-carboxylic acid ethyl ester 4-Chloropyridine-2-carboxylic acid ethyl ester 64064-56-8 C8H8ClNO2
2,3,5-Trimethylpyridine-1-Oxide 2,3,5-Trimethylpyridine-1-Oxide 74409-42-0 C8H11NO
Pyridine, 3-bromo-4-ethyl- (9CI) Pyridine, 3-bromo-4-ethyl- (9CI) 38749-76-7 C7H8BrN
4-Benzylaminopyridine 4-Benzylaminopyridine 13556-71-3 C12H12N2
2-(Bromomethyl)pyridine 2-(Bromomethyl)pyridine 55401-97-3 C6H6BrN
1-(5-Nitro-2-pyridinyl)-3-piperidinol 1-(5-Nitro-2-pyridinyl)-3-piperidinol 88374-36-1 C10H13N3O3
3-CHLORO-5-FORMYL-2-METHOXYPYRIDINE 3-CHLORO-5-FORMYL-2-METHOXYPYRIDINE 132865-44-2 C7H6ClNO2
3-CHLORO-2-FLUOROPYRIDINE-4-BORONIC ACID, PINACOL ESTER 3-CHLORO-2-FLUOROPYRIDINE-4-BORONIC ACID, PINACOL ESTER 1073353-71-5 C11H14BClFNO2
4-METHYL-2-PYRIDIN-2-YL-1,3-THIAZOLE-5-CARBOXYLIC ACID 4-METHYL-2-PYRIDIN-2-YL-1,3-THIAZOLE-5-CARBOXYLIC ACID 34418-48-9 C10H8N2O2S
5-bromo-4-chloropyridine-2,3-diamine 5-bromo-4-chloropyridine-2,3-diamine 1131604-99-3 C5H5BrClN3
2-Amino-3-iodo-6-methylpyridine 2-Amino-3-iodo-6-methylpyridine 884495-19-6 C6H7IN2
5-[(TERT-BUTOXYCARBONYL)AMINO]-2-CHLOROISONICOTINIC ACID 5-[(TERT-BUTOXYCARBONYL)AMINO]-2-CHLOROISONICOTINIC ACID 171178-46-4 C11H13ClN2O4
1-((6-methylpyridin-3-yl)methyl)hydrazine 1-((6-methylpyridin-3-yl)methyl)hydrazine 1016705-16-0 C7H11N3
1-(4-chloropyridin-2-yl)ethanone 1-(4-chloropyridin-2-yl)ethanone 60159-37-7 C7H6ClNO
2-AMINO-6-METHYL-PYRIDINE-3-CARBALDEHYDE 2-AMINO-6-METHYL-PYRIDINE-3-CARBALDEHYDE 885276-99-3 C7H8N2O
3-IODO-2-NITROPYRIDINE 3-IODO-2-NITROPYRIDINE 54231-34-4 C5H3IN2O2
(2-FLUORO-4-METHYLPYRIDIN-3-YL)BORONIC ACID (2-FLUORO-4-METHYLPYRIDIN-3-YL)BORONIC ACID 1029654-30-5 C6H7BFNO2
4-AMINO-1-BENZYLPIPERIDINE DIHYDROCHLORIDE HYDRATE 4-AMINO-1-BENZYLPIPERIDINE DIHYDROCHLORIDE HYDRATE 1205-72-7 C12H18N2.2ClH
1-(3-NITRO-4-PYRIDINYL)-ETHANONE 1-(3-NITRO-4-PYRIDINYL)-ETHANONE 161871-65-4 C7H6N2O3
2,6-DICHLOROPYRIDINE-4-CARBOXIMIDAMIDE HYDROCHLORIDE 2,6-DICHLOROPYRIDINE-4-CARBOXIMIDAMIDE HYDROCHLORIDE 175204-59-8 C6H6Cl3N3
METHYL 2-HYDROXY-5-IODONICOTINATE METHYL 2-HYDROXY-5-IODONICOTINATE 116387-40-7 C7H6INO3
6-METHYLPYRIDINE-2-SULFONAMIDE 6-METHYLPYRIDINE-2-SULFONAMIDE 65938-76-3 C6H8N2O2S
2-Bromo-3,5-dichloropyridine-4-carboxylic acid 2-Bromo-3,5-dichloropyridine-4-carboxylic acid C6H2BrCl2NO2
2,5,6-Trichloro-3-pyridinecarbonitrile 2,5,6-Trichloro-3-pyridinecarbonitrile 40381-92-8 C6HCl3N2
5-bromo-3-methylpicolinonitrile 5-bromo-3-methylpicolinonitrile 156072-86-5 C7H5BrN2
2-(2-Chloro-5-iodine benzyl)-5-(3-(6-fluoro-pyridyl)) thiophene 2-(2-Chloro-5-iodine benzyl)-5-(3-(6-fluoro-pyridyl)) thiophene 1131770-46-1 C16H10ClFINS
2-bromo-N-methylpyridin-3-amine 2-bromo-N-methylpyridin-3-amine 872492-60-9 C6H7BrN2
5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 1218790-39-6 C12H15BF3NO2
6-Chloro-3-Methylpyridine-2-carboxylic Acid 6-Chloro-3-Methylpyridine-2-carboxylic Acid 1201924-32-4 C7H6ClNO2
(2S)-1-[3-Ethyl-7-[[(1-oxido-3-pyridinyl)methyl]amino]pyrazolo[1,5-a]pyrimidin-5-yl]-2-piperidineethanol (2S)-1-[3-Ethyl-7-[[(1-oxido-3-pyridinyl)methyl]amino]pyrazolo[1,5-a]pyrimidin-5-yl]-2-piperidineethanol 779353-01-4 C21H28N6O2
2-Chloro-3-methyl-4-nitropyridine 1-oxide 2-Chloro-3-methyl-4-nitropyridine 1-oxide 60323-95-7 C6H5ClN2O3
PF-04691502 PF-04691502 1013101-36-4 C22H27N5O4
5-METHYLNICOTINAMIDE 5-METHYLNICOTINAMIDE 70-57-5 C7H8N2O
5-FORMYL-2-METHOXY-4-PICOLINE 5-FORMYL-2-METHOXY-4-PICOLINE 123506-66-1 C8H9NO2
3-BROMO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 3-BROMO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 458532-92-8 C11H15BBrNO2
3-(ETHOXYCARBONYL)PYRIDINE-5-BORONIC ACID PINACOL ESTER 3-(ETHOXYCARBONYL)PYRIDINE-5-BORONIC ACID PINACOL ESTER 916326-10-8 C14H20BNO4
(3-AMINO-PYRIDIN-2-YL)-METHANOL (3-AMINO-PYRIDIN-2-YL)-METHANOL 52378-63-9 C6H8N2O
THIAZOLO[4,5-C]PYRIDIN-2-AMINE THIAZOLO[4,5-C]PYRIDIN-2-AMINE 89786-54-9 C6H5N3S
1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 18513-79-6 C5H10ClN
2-(3'-PYRIDYL)BENZOIC ACID 2-(3'-PYRIDYL)BENZOIC ACID 134363-45-4 C12H9NO2
METHYL-5-BROMOMETHYLPYRIDINE-2-CARBOXYLATE METHYL-5-BROMOMETHYLPYRIDINE-2-CARBOXYLATE 55876-84-1 C8H8BrNO2
1-METHYL-1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 1-METHYL-1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 73107-26-3 C6H12ClN
4-(DIMETHYLAMINO)-1-(TRIFLUOROACETYL)-PYRIDINIUM TRIFLUOROACETATE 4-(DIMETHYLAMINO)-1-(TRIFLUOROACETYL)-PYRIDINIUM TRIFLUOROACETATE 181828-01-3 C11H10F6N2O3
(2-CHLORO-BENZYL)-PYRIDIN-2-YLMETHYL-AMINE (2-CHLORO-BENZYL)-PYRIDIN-2-YLMETHYL-AMINE 680185-71-1 C13H13ClN2
2-FLUORO-3-(HYDROXYMETHYL)PYRIDINE 2-FLUORO-3-(HYDROXYMETHYL)PYRIDINE 131747-55-2 C6H6FNO
2-CHLORO-3-FLUOROPYRIDINE N-OXIDE 2-CHLORO-3-FLUOROPYRIDINE N-OXIDE 85386-94-3 C5H3ClFNO
2-ACETAMIDO-5-PYRIDINECARBOXYLIC ACID 2-ACETAMIDO-5-PYRIDINECARBOXYLIC ACID 21550-48-1 C8H8N2O3
5-CHLORO-2-METHOXYNICOTINIC ACID 5-CHLORO-2-METHOXYNICOTINIC ACID 54916-65-3 C7H6ClNO3
2-MORPHOLIN-4-YL-ISONICOTINIC ACID 2-MORPHOLIN-4-YL-ISONICOTINIC ACID 295349-64-3 C10H12N2O3
1-BENZYL-4,4-DIFLUOROPIPERIDINE 1-BENZYL-4,4-DIFLUOROPIPERIDINE 155137-18-1 C12H15F2N
4-AMINOPYRIDINE-3-CARBOXYLIC ACID ETHYL ESTER 4-AMINOPYRIDINE-3-CARBOXYLIC ACID ETHYL ESTER 16952-66-2 C8H10N2O2
2,3,5,6-TETRAFLUOROPYRIDINE-4-PROPIONIC ACID 2,3,5,6-TETRAFLUOROPYRIDINE-4-PROPIONIC ACID 916792-08-0 C8H5F4NO2
2-DI-1-ASP 2-DI-1-ASP 2156-29-8 C16H19IN2
4-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE HYDROCHLORIDE 4-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE HYDROCHLORIDE 732306-24-0 C6H4Cl2F3N
2-CHLORO-5-METHYLPYRIDINE-3-BORONIC ACID 98 2-CHLORO-5-METHYLPYRIDINE-3-BORONIC ACID 98 913835-86-6 C6H7BClNO2
5-IODO-PYRIDIN-3-YLAMINE 5-IODO-PYRIDIN-3-YLAMINE 25391-66-6 C5H5IN2
4-BROMO-5-FLUORO-2-METHOXYPYRIDINE 4-BROMO-5-FLUORO-2-METHOXYPYRIDINE 884495-00-5 C6H5BrFNO
6,6'-Dibromo-2,2'-bipyridyl 6,6'-Dibromo-2,2'-bipyridyl 49669-22-9 C10H6Br2N2
METHYL 6-MORPHOLINONICOTINATE METHYL 6-MORPHOLINONICOTINATE 132546-81-7 C11H14N2O3
CHEMPACIFIC 38149 CHEMPACIFIC 38149 42508-74-7 C7H9NO
3-(3-PYRIDYL)ACRYLIC ACID 3-(3-PYRIDYL)ACRYLIC ACID 19337-97-4 C8H7NO2
2-AMINO-3,5-DICYANOPYRIDINE 2-AMINO-3,5-DICYANOPYRIDINE 78473-10-6 C7H4N4
3-[(4-CHLOROBENZYL)OXY]-2-METHYLPYRIDIN-4-OL 3-[(4-CHLOROBENZYL)OXY]-2-METHYLPYRIDIN-4-OL 287928-09-0 C13H12ClNO2
2-HYDROXY-6-METHOXYPYRIDINE 2-HYDROXY-6-METHOXYPYRIDINE 22385-36-0 C6H7NO2
3-BROMO-6-CHLORO-2-FLUOROPYRIDINE 3-BROMO-6-CHLORO-2-FLUOROPYRIDINE 885952-18-1 C5H2BrClFN
N-[5-(TRIFLUOROMETHYL)PYRID-2-YL]-N-METHYLHYDRAZINE N-[5-(TRIFLUOROMETHYL)PYRID-2-YL]-N-METHYLHYDRAZINE 163620-24-4 C7H8F3N3
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