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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-BROMO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 3-BROMO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 1031929-01-7 C6H2BrF4N
(5-TRIFLUOROMETHYL-PYRIDIN-2-YL) METHANOL (5-TRIFLUOROMETHYL-PYRIDIN-2-YL) METHANOL 31181-84-7 C7H6F3NO
4-(3-Methoxypropoxy)-2,3-dimethylpyridine-N-oxide 4-(3-Methoxypropoxy)-2,3-dimethylpyridine-N-oxide 117977-18-1 C11H17NO3
2-FLUORO-6-PICOLINE-5-BORONIC ACID 2-FLUORO-6-PICOLINE-5-BORONIC ACID 904326-91-6 C6H7BFNO2
7-HYDROXY-4-(4-PYRIDYL)COUMARIN MONOHYDRATE 7-HYDROXY-4-(4-PYRIDYL)COUMARIN MONOHYDRATE 386704-08-1 C14H11NO4
2-(BENZYLTHIO)-3-NITROPYRIDINE 2-(BENZYLTHIO)-3-NITROPYRIDINE 69212-31-3 C12H10N2O2S
5-Methylpyridine-3-carboxaldehyde 5-Methylpyridine-3-carboxaldehyde 100910-66-5 C7H7NO
NAPHTHALEN-1-YLMETHYL-PYRIDIN-4-YLMETHYL-AMINE NAPHTHALEN-1-YLMETHYL-PYRIDIN-4-YLMETHYL-AMINE 680185-80-2 C17H16N2
(4-Pyridylthio)acetic acid (4-Pyridylthio)acetic acid 10351-19-6 C7H7NO2S
tert-Butyl 2-(4-(pyridin-2-yl)benzyl)hydrazinecarboxylate tert-Butyl 2-(4-(pyridin-2-yl)benzyl)hydrazinecarboxylate 198904-85-7 C17H21N3O2
ETHYL 4-PYRIDYLACETATE ETHYL 4-PYRIDYLACETATE 54401-85-3 C9H11NO2
4-Chlorothieno[3,2-c]pyridine 4-Chlorothieno[3,2-c]pyridine 27685-94-5 C7H4ClNS
2,6-Dichloro-3-(trifluoromethyl)pyridine 2,6-Dichloro-3-(trifluoromethyl)pyridine 55304-75-1 C6H2Cl2F3N
2,6-BIS(TRIFLUOROMETHYL)PYRIDINE 2,6-BIS(TRIFLUOROMETHYL)PYRIDINE 455-00-5 C7H3F6N
7-METHYL-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 7-METHYL-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 70705-33-8 C11H12N2O2
2,3,4,6-TETRAFLUOROPYRIDINE 2,3,4,6-TETRAFLUOROPYRIDINE 3512-13-8 C5HF4N
2-AMINOPYRIDINE-5-SULFONIC ACID 2-AMINOPYRIDINE-5-SULFONIC ACID 16250-08-1 C5H6N2O3S
3,5-DICHLORO-2,6-DIFLUOROPYRIDINE-4-CARBOXALDEHYDE 3,5-DICHLORO-2,6-DIFLUOROPYRIDINE-4-CARBOXALDEHYDE 17723-32-9 C6HCl2F2NO
2-Chloromethyl-3-methyl-4-(3-methoxypropoxy)pyridine hydrochloride 2-Chloromethyl-3-methyl-4-(3-methoxypropoxy)pyridine hydrochloride 153259-31-5 C11H17Cl2NO2
2,4,6-TRIBROMO-3-PYRIDINOL 2,4,6-TRIBROMO-3-PYRIDINOL 6602-34-2 C5H2Br3NO
3,4,5,6-Tetrachloropyridine-2-carbonitrile 3,4,5,6-Tetrachloropyridine-2-carbonitrile 17824-83-8 C6Cl4N2
2-METHYLNICOTINALDEHYDE 2-METHYLNICOTINALDEHYDE 60032-57-7 C7H7NO
2-METHYL-5-IODOPYRIDINE 2-METHYL-5-IODOPYRIDINE 695-17-0 C6H6IN
(5-CHLORO-2-FLUOROPYRIDIN-4-YL)BORONIC ACID (5-CHLORO-2-FLUOROPYRIDIN-4-YL)BORONIC ACID 1034659-38-5 C5H4BClFNO2
CHEMPACIFIC 38154 CHEMPACIFIC 38154 84487-04-7 C5H4BrN3O2
2-Amino-4-chloro-6-picoline 2-Amino-4-chloro-6-picoline 36340-61-1 C6H7ClN2
2-Amino-6-chloro-4-picoline 2-Amino-6-chloro-4-picoline 51564-92-2 C6H7ClN2
3-Chloro-4-fluoropyridine 3-Chloro-4-fluoropyridine 883107-69-5 C5H3ClFN
5-Chloropyridine-2-thiol 5-Chloropyridine-2-thiol 40771-41-3 C5H4ClNS
4-Cyano-3-methylpyridine 4-Cyano-3-methylpyridine 7584-05-6 C7H6N2
2-Bromo-4-methoxypyridine 2-Bromo-4-methoxypyridine 89488-29-9 C6H6BrNO
2-TRIFLUOROMETHYL-3-AMINOPYRIDINE 2-TRIFLUOROMETHYL-3-AMINOPYRIDINE 106877-32-1 C6H5F3N2
6-BENZYL-5,7-DIOXO-OCTAHYDROPYRROLO[3,4-B] PYRIDINE 6-BENZYL-5,7-DIOXO-OCTAHYDROPYRROLO[3,4-B] PYRIDINE 128740-13-6 C14H16N2O2
4-Chloro-5-fluoro-2-methylpyridine 4-Chloro-5-fluoro-2-methylpyridine 169750-95-2 C6H5ClFN
3-OXO-3-(3-PYRIDINYL)PROPANENITRILE 3-OXO-3-(3-PYRIDINYL)PROPANENITRILE 30510-18-0 C8H6N2O
4-Amino-3,5-difluoropyridine 4-Amino-3,5-difluoropyridine 159783-22-9 C5H4F2N2
2,5-DIBROMO-3-AMINOPYRIDINE 2,5-DIBROMO-3-AMINOPYRIDINE 90902-84-4 C5H4Br2N2
2-Pyridyl tribromomethyl sulfone 2-Pyridyl tribromomethyl sulfone 59626-33-4 C6H4Br3NO2S
N-BUTYL-3-METHYLPYRIDINIUM BROMIDE N-BUTYL-3-METHYLPYRIDINIUM BROMIDE 26576-85-2 C10H16BrN
2-Pyridinecarboxaldehyde,6-(fluoromethyl)-(9CI) 2-Pyridinecarboxaldehyde,6-(fluoromethyl)-(9CI) 208111-28-8 C7H6FNO
5H-Cyclopenta[b]pyridin-5-amine,6,7-dihydro-(9CI) 5H-Cyclopenta[b]pyridin-5-amine,6,7-dihydro-(9CI) 535935-84-3 C8H10N2
(2-Chloropyridin-3-yl)methanamine (2-Chloropyridin-3-yl)methanamine 205744-14-5 C6H7ClN2
3-CHLORO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 3-CHLORO-2-FLUORO-5-(TRIFLUOROMETHYL)PYRIDINE 72537-17-8 C6H2ClF4N
2,4-Dichloro-3-iodopyridine 2,4-Dichloro-3-iodopyridine 343781-36-2 C5H2Cl2IN
1-(5-Nitro-2-pyridinyl)piperidine-4-carboxylic acid 1-(5-Nitro-2-pyridinyl)piperidine-4-carboxylic acid 868077-44-5 C11H13N3O4
DIMETHYL 5-BROMOPYRIDINE-2,3-DICARBOXYLATE DIMETHYL 5-BROMOPYRIDINE-2,3-DICARBOXYLATE 98555-51-2 C7H4BrNO4
5-BROMO-2-FLUORONICOTINIC ACID 5-BROMO-2-FLUORONICOTINIC ACID 29241-66-5 C6H3BrFNO2
2-METHYLPYRIDINE-4-SULFONIC ACID 2-METHYLPYRIDINE-4-SULFONIC ACID 408533-46-0 C6H7NO3S
3-BROMOISONICOTINIC ACID METHYL ESTER 3-BROMOISONICOTINIC ACID METHYL ESTER 59786-31-1 C7H6BrNO2
4-(5-NITROPYRIDIN-2-YL)BENZOIC ACID 4-(5-NITROPYRIDIN-2-YL)BENZOIC ACID 223127-49-9 C12H8N2O4
2,6-DIMETHYLPYRIDINIUM P-TOLUENESULFONATE 2,6-DIMETHYLPYRIDINIUM P-TOLUENESULFONATE 93471-41-1 C14H17NO3S
2,6-Dimethoxypyridine-3-carboxylic acid 2,6-Dimethoxypyridine-3-carboxylic acid 16727-43-8 C8H9NO4
(2-Methyl-6-trifluoromethylpyridin-3-yl)amine (2-Methyl-6-trifluoromethylpyridin-3-yl)amine 383907-17-3 C7H7F3N2
4-CYANO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 4-CYANO-3-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 878194-91-3 C12H15BN2O2
4-Bromo-2,6-diethyl-pyridine 4-Bromo-2,6-diethyl-pyridine 877133-54-5 C9H12BrN
benzyl 3,4-dihydro-2-methyl-4-oxopyridine-1(2H)-carboxylate benzyl 3,4-dihydro-2-methyl-4-oxopyridine-1(2H)-carboxylate 190906-91-3 C14H15NO3
Des-N-(methoxycarbonyl)-L-tert-leucine Bis-Boc Atazanavir Des-N-(methoxycarbonyl)-L-tert-leucine Bis-Boc Atazanavir 198904-86-8 C32H42N4O5
2-METHOXYLYPYRIDINE-4-BORONIC ACID PINACOLATE 2-METHOXYLYPYRIDINE-4-BORONIC ACID PINACOLATE 408502-23-8 C12H18BNO3
6-METHYL-2,3-PYRIDINEDICARBOXYLIC ACID 6-METHYL-2,3-PYRIDINEDICARBOXYLIC ACID 53636-70-7 C8H7NO4
5-tert-butyl 2-ethyl 6,7-dihydrothiazolo[5,4-c]pyridine-2,5(4H)-dicarboxylate 5-tert-butyl 2-ethyl 6,7-dihydrothiazolo[5,4-c]pyridine-2,5(4H)-dicarboxylate 1053656-51-1 C14H20N2O4S
2-FLUORO-3,4-DIIODOPYRIDINE 2-FLUORO-3,4-DIIODOPYRIDINE 153034-83-4 C5H2FI2N
N719 N719 207347-46-4 2C16H36N.2C12H7N2O4.C2N2RuS2
2-AMINO-3-CHLORO-5-BROMOPYRIDINE 2-AMINO-3-CHLORO-5-BROMOPYRIDINE 38185-55-6 C5H4BrClN2
Pyridine hydrofluoride Pyridine hydrofluoride 62778-11-4 C5H6FN
2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE 2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE 496-13-9 C7H8N2
5-AMINO-2-METHOXY-ISONICOTINIC ACID 5-AMINO-2-METHOXY-ISONICOTINIC ACID 183741-91-5 C7H8N2O3
1-(3-METHYLPYRIDIN-2-YL)PIPERAZINE 1-(3-METHYLPYRIDIN-2-YL)PIPERAZINE 111960-11-3 C10H15N3
2,6-DIMETHYL-NICOTINIC ACID 2,6-DIMETHYL-NICOTINIC ACID 5860-71-9 C8H9NO2
N-BOC-4-(4-CARBOXYPHENYL) PIPERIDINE N-BOC-4-(4-CARBOXYPHENYL) PIPERIDINE 149353-75-3 C17H23NO4
5-NITRO-2-HYDROXY-4-METHOXYPYRIDINE 5-NITRO-2-HYDROXY-4-METHOXYPYRIDINE 607373-82-0 C6H6N2O4
2-(BROMOACETYL)PYRIDINE HYDROBROMIDE 2-(BROMOACETYL)PYRIDINE HYDROBROMIDE 17570-98-8 C7H7Br2NO
2-METHYL-5-NITROPYRIDIN-3-AMINE 2-METHYL-5-NITROPYRIDIN-3-AMINE 51984-61-3 C6H7N3O2
3-Methylpyridine-4-sulfonic acid 3-Methylpyridine-4-sulfonic acid 14045-23-9 C6H7NO3S
N-(3-IODO-PYRIDIN-4-YL)-2,2-DIMETHYL-PROPIONAMIDE N-(3-IODO-PYRIDIN-4-YL)-2,2-DIMETHYL-PROPIONAMIDE 113975-33-0 C10H13IN2O
2-CHLORO-5-NITRO-3-(TRIFLUOROMETHYL)PYRIDINE 2-CHLORO-5-NITRO-3-(TRIFLUOROMETHYL)PYRIDINE 99368-67-9 C6H2ClF3N2O2
4-CHLORO-3-IODOPYRIDINE 4-CHLORO-3-IODOPYRIDINE 89167-34-0 C5H3ClIN
2,6-DIBROMO-3-HYDROXYPYRIDINE 2,6-DIBROMO-3-HYDROXYPYRIDINE 6602-33-1 C5H3Br2NO
1-N-HEXADECYL-4-METHYLPYRIDINIUM CHLORIDE HYDRATE 1-N-HEXADECYL-4-METHYLPYRIDINIUM CHLORIDE HYDRATE 13106-53-1 C22H42ClNO
1,2,3,6-TETRAHYDROPYRIDINE 1,2,3,6-TETRAHYDROPYRIDINE 694-05-3 C5H9N
1-PYRIDIN-2-YL-PROPAN-2-ONE 1-PYRIDIN-2-YL-PROPAN-2-ONE 6302-02-9 C8H9NO
3-CYANO-2-METHOXYPYRIDINE 3-CYANO-2-METHOXYPYRIDINE 7254-34-4 C7H6N2O
5-IODO-4-METHYL-PYRIDIN-2-YLAMINE 5-IODO-4-METHYL-PYRIDIN-2-YLAMINE 356561-08-5 C6H7IN2
5-BROMOPYRIDINE-2-CARBONYL CHLORIDE 5-BROMOPYRIDINE-2-CARBONYL CHLORIDE 137178-88-2 C6H3BrClNO
2-Ethoxy-3-pyridineboronic acid 2-Ethoxy-3-pyridineboronic acid 854373-97-0 C7H10BNO3
4-(3-Phenylpropyl)pyridine 4-(3-Phenylpropyl)pyridine 2057-49-0 C14H15N
4,4'-Dinonyl-2,2'-bipyridine 4,4'-Dinonyl-2,2'-bipyridine 142646-58-0 C28H44N2
2,5-DIAMINO-3-PICOLINE, 2,5-DIAMINO-3-PICOLINE, 106070-58-0 C6H9N3
2-Mercapto-6-(trifluoromethyl)pyridine 2-Mercapto-6-(trifluoromethyl)pyridine 121307-80-0 C6H4F3NS
2-NITRO-5-METHYLPYRIDINE 2-NITRO-5-METHYLPYRIDINE 1074-38-0 C6H6N2O2
4-Pyridineethanesulfonic acid 4-Pyridineethanesulfonic acid 53054-76-5 C7H9NO3S
2-AMINO-3-BROMO-4-METHYLPYRIDINE 2-AMINO-3-BROMO-4-METHYLPYRIDINE 40073-38-9 C6H7BrN2
N-FLUORO-4,6-DIMETHYLPYRIDINIUM-2-SULFONATE N-FLUORO-4,6-DIMETHYLPYRIDINIUM-2-SULFONATE 147541-01-3 C7H8FNO3S
4-METHOXYPYRIDINE-2-CARBOXYLIC ACID 4-METHOXYPYRIDINE-2-CARBOXYLIC ACID 29082-91-5 C7H7NO3
METHYL 2-AMINO-5-BROMO-4-PYRIDINECARBOXYLATE METHYL 2-AMINO-5-BROMO-4-PYRIDINECARBOXYLATE 882499-87-8 C7H7BrN2O2
5-BROMO-4-METHOXYCARBONYL-2(1H)-PYRIDINONE 5-BROMO-4-METHOXYCARBONYL-2(1H)-PYRIDINONE 913836-17-6 C7H6BrNO3
5-Aminopyridine-2-carboxamide 5-Aminopyridine-2-carboxamide 145255-19-2 C6H7N3O
4-Amino-2-hydroxy-3-nitropyridine 4-Amino-2-hydroxy-3-nitropyridine 88511-57-3 C5H5N3O3
4,6-Dihydroxynicotinic acid 4,6-Dihydroxynicotinic acid 5466-62-6 C6H5NO4
5-Chloropyridine-2-carboxylic acid methyl ester 5-Chloropyridine-2-carboxylic acid methyl ester 132308-19-1 C7H6ClNO2
2-Hydroxymethyl-3-methyl-4-(3-methoxy propanoxyl)pyridine 2-Hydroxymethyl-3-methyl-4-(3-methoxy propanoxyl)pyridine 118175-10-3 C11H17NO3
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