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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
2,3,6-TRIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 2,3,6-TRIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 84940-46-5 C6HF6N
5-(TRIFLUOROMETHYL)PYRID-2-YLHYDRAZINE 5-(TRIFLUOROMETHYL)PYRID-2-YLHYDRAZINE 89570-85-4 C6H6F3N3
N-Methyl 5-bromopicolinamide N-Methyl 5-bromopicolinamide 845305-87-5 C7H7BrN2O
2-CHLORO-3-FLUORO-5-HYDROXYPYRIDINE 2-CHLORO-3-FLUORO-5-HYDROXYPYRIDINE C5H3ClFNO
3-Pyridinemethanamine,5-fluoro-(9CI) 3-Pyridinemethanamine,5-fluoro-(9CI) 23586-96-1 C6H7FN2
1-N-BOC-4-(4-PYRIDYLMETHYLAMINO)PIPERIDINE 1-N-BOC-4-(4-PYRIDYLMETHYLAMINO)PIPERIDINE 206274-24-0 C16H25N3O2
Ethanone, 1-(3-methyl-2-pyridinyl)- (9CI) Ethanone, 1-(3-methyl-2-pyridinyl)- (9CI) 85279-30-7 C8H9NO
Ethanamine, 2-(3-pyridinyloxy)- (9CI) Ethanamine, 2-(3-pyridinyloxy)- (9CI) 310880-25-2 C7H10N2O
4-METHYL-PYRIDINE-2-SULFONYL CHLORIDE 4-METHYL-PYRIDINE-2-SULFONYL CHLORIDE 341008-95-5 C6H6ClNO2S
Pyridine, 2-(chloromethyl)-3-fluoro- (9CI) Pyridine, 2-(chloromethyl)-3-fluoro- (9CI) 149489-32-7 C6H5ClFN
Pyridine, 2-(bromomethyl)-4,6-dimethyl- (9CI) Pyridine, 2-(bromomethyl)-4,6-dimethyl- (9CI) 79313-01-2 C8H10BrN
2,6-Dimethoxy-3,5-dinitropyridine 2,6-Dimethoxy-3,5-dinitropyridine 18677-42-4 C7H7N3O6
2-Bromo-6-Chloro-4-Picoline 2-Bromo-6-Chloro-4-Picoline 157329-89-0 C6H5BrClN
3-Bromo-4-Iodopyridine 3-Bromo-4-Iodopyridine 89167-19-1 C5H3BrIN
3-Methoxy-2-Nitro-6-Picoline 3-Methoxy-2-Nitro-6-Picoline 24015-98-3 C7H8N2O3
	2,4-Dimethoxypyridine 2,4-Dimethoxypyridine 18677-43-5 C7H9NO2
2-AMINO-3-BROMO-5-HYDROXYPYRIDINE 2-AMINO-3-BROMO-5-HYDROXYPYRIDINE 186593-53-3 C5H5BrN2O
2-AMINO-3-HYDROXY-4-BROMOPYRIDINE HBR 2-AMINO-3-HYDROXY-4-BROMOPYRIDINE HBR 114414-17-4 C5H6Br2N2O
Piroctone olamine Piroctone olamine 68890-66-4 C16H30N2O3
2,6-DICHLORO-4-(CHLOROMETHYL)PYRIDINE 2,6-DICHLORO-4-(CHLOROMETHYL)PYRIDINE 101990-72-1 C6H4Cl3N
6-CHLOROPYRIDINE-3,4-DICARBOXYLIC ACID 6-CHLOROPYRIDINE-3,4-DICARBOXYLIC ACID 243835-70-3 C7H4ClNO4
6-CHLORO-2-METHYLPYRIDINE-3-BORONIC ACID 6-CHLORO-2-METHYLPYRIDINE-3-BORONIC ACID 913836-15-4 C6H7BClNO2
4'-CHLORO-2,2':6',2''-TERPYRIDINE 4'-CHLORO-2,2':6',2''-TERPYRIDINE 128143-89-5 C15H10ClN3
4-PYRIDIN-3-YL-BENZOIC ACID 4-PYRIDIN-3-YL-BENZOIC ACID 4385-75-5 C12H9NO2
2-AMINO-5-BROMO-4 6-DIMETHYLPYRIDINE 2-AMINO-5-BROMO-4 6-DIMETHYLPYRIDINE 89856-44-0 C7H9BrN2
3 5-DIACETYL-2 4 6-TRIMETHYL-1 4-DIHYDR& 3 5-DIACETYL-2 4 6-TRIMETHYL-1 4-DIHYDR& 1081-09-0 C12H17NO2
2,6-DIAMINO-3,5-DINITROPYRIDINE 2,6-DIAMINO-3,5-DINITROPYRIDINE 34981-11-8 C5H5N5O4
2-(2-HYDROXYCARBONYL-6-PYRIDYL)MALONDIALDEHYDE 2-(2-HYDROXYCARBONYL-6-PYRIDYL)MALONDIALDEHYDE 212755-80-1 C9H7NO4
3-AMINO-6-METHOXY-2-METHYLAMINO-PYRIDINE, DIHYDROCHLORIDE SPECIALITY CHEMICALS 3-AMINO-6-METHOXY-2-METHYLAMINO-PYRIDINE, DIHYDROCHLORIDE SPECIALITY CHEMICALS 83732-72-3 C7H12ClN3O
2,4-DIMETHYLPYRIDINE-3-CARBOXYLIC ACID N-OXIDE 2,4-DIMETHYLPYRIDINE-3-CARBOXYLIC ACID N-OXIDE 372156-99-5 C8H9NO3
3-PIPERIDIN-4-YLMETHYLPYRIDINE DIHYDROCHLORIDE 3-PIPERIDIN-4-YLMETHYLPYRIDINE DIHYDROCHLORIDE C11H18Cl2N2
2-BROMO-5-CYANO-6-PICOLINE 2-BROMO-5-CYANO-6-PICOLINE 1003711-39-4 C7H5BrN2
2-AMINO-5-FLUORO-3-NITRO-4-PICOLINE 2-AMINO-5-FLUORO-3-NITRO-4-PICOLINE 917918-86-6 C6H6FN3O2
3-BROMO-2-CHLORO-5-NITRO-6-PICOLINE 3-BROMO-2-CHLORO-5-NITRO-6-PICOLINE 856834-95-2 C6H4BrClN2O2
3,5-dimethylpyridine-4-carboxylic acid 3,5-dimethylpyridine-4-carboxylic acid 544703-96-0 C8H9NO2
2,4-DIHYDROXY-5-HYDROXYMETHYLPYRIDINE 2,4-DIHYDROXY-5-HYDROXYMETHYLPYRIDINE 143834-60-0 C6H7NO3
hydroxy-[(4-methylpyridin-2-yl)amino]-oxo-azanium hydroxy-[(4-methylpyridin-2-yl)amino]-oxo-azanium 33245-30-6 C6H7N3O2
2-cyano-3-nitro-5-fluoropyridine 2-cyano-3-nitro-5-fluoropyridine 1033202-51-5 C6H2FN3O2
2,3,5-Trichloropyridine-4-carboxylic acid 2,3,5-Trichloropyridine-4-carboxylic acid 406676-18-4 C6H2Cl3NO2
2,4,6-Tribromopyridine 2,4,6-Tribromopyridine 2408-70-0 C5H2Br3N
2-Bromo-3-hydroxy-6-iodopyridine 2-Bromo-3-hydroxy-6-iodopyridine 129611-32-1 C5H3BrINO
2-Iodo-6-methylpyridine 2-Iodo-6-methylpyridine 62674-71-9 C6H6IN
3-Amino-2,6-dichloro-5-fluoropyridine 3-Amino-2,6-dichloro-5-fluoropyridine 152840-65-8 C5H3Cl2FN2
3,5-DICHLORO-4-FLUOROPYRIDINE 3,5-DICHLORO-4-FLUOROPYRIDINE 916791-62-3 C5H2Cl2FN
2-CHLORO-4-IODOPYRIDINE-3-METHANOL 2-CHLORO-4-IODOPYRIDINE-3-METHANOL 884494-44-4 C6H5ClINO
(3-Chloropyridin-4-yl)methanol (3-Chloropyridin-4-yl)methanol 79698-53-6 C6H6ClNO
3-FLUORO-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER 3-FLUORO-PYRIDINE-2-CARBOXYLIC ACID METHYL ESTER 869108-35-0 C7H6FNO2
5-METHOXY-NICOTINIC ACID 5-METHOXY-NICOTINIC ACID 20826-03-3 C7H7NO3
2(1H)-Pyridinone, 3-bromo-4-hydroxy- 2(1H)-Pyridinone, 3-bromo-4-hydroxy- 96245-97-5 C5H4BrNO2
5-Trifluoromethyl-pyridine-2-carbaldehyde 5-Trifluoromethyl-pyridine-2-carbaldehyde 31224-82-5 C7H4F3NO
3-BROMO-5-IODO-PYRIDIN-4-YLAMINE 3-BROMO-5-IODO-PYRIDIN-4-YLAMINE 902837-39-2 C5H4BrIN2
Methyl 2-(trifluoromethyl)nicotinate Methyl 2-(trifluoromethyl)nicotinate 136483-17-5 C8H6F3NO2
Diethyl pyridine-3,5-dicarboxylate Diethyl pyridine-3,5-dicarboxylate 4591-56-4 C11H13NO4
6-FLUORO-2-METHYLNICOTINIC ACID 6-FLUORO-2-METHYLNICOTINIC ACID 884494-97-7 C7H6FNO2
7-Methylimidazo(1,2-a)pyridine 7-Methylimidazo(1,2-a)pyridine 874-39-5 C8H8N2
3,5-DINITRO-4-HYDROXYPYRIDINE 3,5-DINITRO-4-HYDROXYPYRIDINE 10425-71-5 C5H3N3O5
4-Ethoxy-2-Fluoropyridine 4-Ethoxy-2-Fluoropyridine 175965-82-9 C7H8FNO
2-Fluoro-4-Bromo-3-Picoline 2-Fluoro-4-Bromo-3-Picoline 128071-79-4 C6H5BrFN
2-Chloro-4-Bromo-3-Picoline 2-Chloro-4-Bromo-3-Picoline 128071-86-3 C6H5BrClN
3,4-Dichloro-2-Picoline 3,4-Dichloro-2-Picoline 103949-58-2 C6H5Cl2N
Ethanone, 1-(5-hydroxy-2-pyridinyl)- (9CI) Ethanone, 1-(5-hydroxy-2-pyridinyl)- (9CI) 67310-56-9 C7H7NO2
2-PHENOXYPYRIDINE 2-PHENOXYPYRIDINE 4783-68-0 C11H9NO
Pyridine, 4-(bromomethyl)- (9CI) Pyridine, 4-(bromomethyl)- (9CI) 54751-01-8 C6H6BrN
2-BROMO-3-HYDROXYPYRIDINE-N-OXIDE 2-BROMO-3-HYDROXYPYRIDINE-N-OXIDE 6602-29-5 C5H4BrNO2
2-Benzyloxy-pyridine-5-boronic acid 2-Benzyloxy-pyridine-5-boronic acid 929250-35-1 C12H12BNO3
2-Bromo-3-fluoro-5-(trifluoromethyl)pyridine 2-Bromo-3-fluoro-5-(trifluoromethyl)pyridine 89402-29-9 C6H2BrF4N
(S,S)-6-BENZYL-OCTAHYDRO-PYRROLO[3,4-B]PYRIDINE DIHYDROCHLORIDE
(S,S)-6-BENZYL-OCTAHYDRO-PYRROLO[3,4-B]PYRIDINE DIHYDROCHLORIDE 151213-39-7 C14H20N2
METHYLPYRIDIN-2-YLMETHYLAMINE DIHYDROCHLORIDE METHYLPYRIDIN-2-YLMETHYLAMINE DIHYDROCHLORIDE 21035-59-6 C7H10N2
5-BROMO-2-IODOPYRIDIN-3-OL 5-BROMO-2-IODOPYRIDIN-3-OL 188057-49-0 C5H3BrINO
4-aminopicolinonitrile 4-aminopicolinonitrile 98139-15-2 C6H5N3
5H-Cyclopenta[c]pyridin-5-one,6,7-dihydro-(9CI) 5H-Cyclopenta[c]pyridin-5-one,6,7-dihydro-(9CI) 350847-80-2 C8H7NO
SODIUM NICOTINATE SODIUM NICOTINATE 54-86-4 C6H6NNaO2
3-Pyridinecarbonitrile,5-methoxy-(9CI) 3-Pyridinecarbonitrile,5-methoxy-(9CI) 298204-74-7 C7H6N2O
4-Pyridinamine,2,5-dichloro-(9CI) 4-Pyridinamine,2,5-dichloro-(9CI) 405230-82-2 C5H4Cl2N2
2-Amino-5-bromo-4-methylpyridine-3-carbonitrile 2-Amino-5-bromo-4-methylpyridine-3-carbonitrile 180994-87-0 C7H6BrN3
Ethyl 8-bromo-6-chloroimidazo[1,2-a]pyridine-2-carboxylate Ethyl 8-bromo-6-chloroimidazo[1,2-a]pyridine-2-carboxylate 951884-22-3 C10H8BrClN2O2
6-BENZYLOXY-3-HYDROXYPYRIDINE 6-BENZYLOXY-3-HYDROXYPYRIDINE 725256-57-5 C12H11NO2
(4-Bromopyridin-3-yl)methanol (4-Bromopyridin-3-yl)methanol 197007-87-7 C6H6BrNO
N-(3-Bromo-5-fluoropyridin-2-yl)acetamide N-(3-Bromo-5-fluoropyridin-2-yl)acetamide 1065074-95-4 C7H6BrFN2O
4-Chloro-5,6-difluoropyridine-3-carboxylic acid 4-Chloro-5,6-difluoropyridine-3-carboxylic acid 851386-32-8 C6H2ClF2NO2
2,6-Dichloro-4-methyl-3-nitropyridine 2,6-Dichloro-4-methyl-3-nitropyridine 60010-03-9 C6H4Cl2N2O2
3-Bromo-2-fluoro--pyridine-5-carboxylic acid
3-Bromo-2-fluoro--pyridine-5-carboxylic acid 29241-63-2 C6H3BrFNO2
(Z,E)-N'-hydroxy-2-(2-oxopyridin-1(2H)-yl)Ethanimidamide (Z,E)-N'-hydroxy-2-(2-oxopyridin-1(2H)-yl)Ethanimidamide 871544-57-9 C7H9N3O2
5-BROMO-3-NITROPYRIDINE-2-CARBOXYLIC ACID 5-BROMO-3-NITROPYRIDINE-2-CARBOXYLIC ACID 954240-89-2 C6H3BrN2O4
2-CHLOROPYRIDINE-3,4-DICARBOXYLIC ACID 2-CHLOROPYRIDINE-3,4-DICARBOXYLIC ACID 215306-02-8 C7H4ClNO4
2-Ethyl-5,7-diMethyl-3H-iMidazo[4,5-b]pyridine 2-Ethyl-5,7-diMethyl-3H-iMidazo[4,5-b]pyridine 133240-06-9 C10H13N3
POBN POBN 66893-81-0 C10H14N2O2
3-BROMO-5-PHENYLPYRIDINE 3-BROMO-5-PHENYLPYRIDINE 142137-17-5 C11H8BrN
5-AMINO-2-CHLORO-NICOTINIC ACID 5-AMINO-2-CHLORO-NICOTINIC ACID 42959-39-7 C6H5ClN2O2
3,5-DIBROMO-PYRIDINE-2-CARBONITRILE 3,5-DIBROMO-PYRIDINE-2-CARBONITRILE 61830-09-9 C6H2Br2N2
2-HYDROXY-3-IODO-5-METHYLPYRIDINE 2-HYDROXY-3-IODO-5-METHYLPYRIDINE 313678-93-2 C6H6INO
5-BROMOPYRIDINE-2-BORONIC ACID 5-BROMOPYRIDINE-2-BORONIC ACID 652148-97-5 C5H5BBrNO2
2-Amino-4-fluoropyridine 2-Amino-4-fluoropyridine C5H5FN2
5-Bromo-2-(piperidin-1-yl)pyridine 5-Bromo-2-(piperidin-1-yl)pyridine 24255-95-6 C10H13BrN2
3,5-Dibromo-2-fluoro-6-methylpyridine 3,5-Dibromo-2-fluoro-6-methylpyridine 632628-07-0 C6H4Br2FN
3,4,5-Trifluoropyridine 3,4,5-Trifluoropyridine 67815-54-7 C5H2F3N
3-(6-Bromo-pyridin-2-yl)-4-methyl-benzoicacidmethylester 3-(6-Bromo-pyridin-2-yl)-4-methyl-benzoicacidmethylester 1020718-65-3 C14H12BrNO2
1-(2-AMINO-PYRIDIN-3-YL)-ETHANOL 1-(2-AMINO-PYRIDIN-3-YL)-ETHANOL 869567-91-9 C7H10N2O
6-HYDROXYMETHYL-PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 6-HYDROXYMETHYL-PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 41337-81-9 C9H11NO3
Tak-715 Tak-715 303162-79-0 C24H21N3OS
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