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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
PYRIDINE-3,4,5-TRIAMINE PYRIDINE-3,4,5-TRIAMINE 618439-82-0 C5H8N4
2,3-Diamino-5-methylpyridine 2,3-Diamino-5-methylpyridine 24638-29-7 C6H9N3
5-BROMO-PYRAZOLO[1,5-A]PYRIDINE-3-CARBOXYLIC ACID ETHYL ESTER 5-BROMO-PYRAZOLO[1,5-A]PYRIDINE-3-CARBOXYLIC ACID ETHYL ESTER 885276-93-7 C10H9BrN2O2
5-BROMO-3-METHOXYPYRIDIN-2-AMINE 5-BROMO-3-METHOXYPYRIDIN-2-AMINE 42409-58-5 C6H7BrN2O
E 7010 E 7010 141430-65-1 C18H17N3O4S
5,6-Difluoropyridine-2-carboxylic acid 5,6-Difluoropyridine-2-carboxylic acid 851386-38-4 C6H3F2NO2
2,3-DICHLORO-6-PICOLINE 2,3-DICHLORO-6-PICOLINE 54957-86-7 C6H5Cl2N
Isoxazolo[4,5-b]pyridin-3-amine (9CI) Isoxazolo[4,5-b]pyridin-3-amine (9CI) 114080-93-2 C6H5N3O
2-Pyridineacetic acid, 5-methyl- (9CI) 2-Pyridineacetic acid, 5-methyl- (9CI) 848093-05-0 C8H9NO2
2-CHLORO-5-FLUORO-3-NITRO-4-PICOLINE 2-CHLORO-5-FLUORO-3-NITRO-4-PICOLINE 1003711-51-0 C6H4ClFN2O2
(6-ethylpyridin-2-yl)methanol (6-ethylpyridin-2-yl)methanol 163658-33-1 C8H11NO
2-Bromo-4-pyridinethylamine 2-Bromo-4-pyridinethylamine 858362-82-0 C6H7BrN2
2-CHLORO-3-(HYDROXYMETHYL)-4-IODOPYRIDINE 2-CHLORO-3-(HYDROXYMETHYL)-4-IODOPYRIDINE C6H5ClINO
2-Acetamidopyridine-5-boronic acid 2-Acetamidopyridine-5-boronic acid 947533-21-3 C7H9BN2O3
4-(6-Chloro-pyrazin-2-yl)-2-methyl-benzoicacid 4-(6-Chloro-pyrazin-2-yl)-2-methyl-benzoicacid 1020718-74-4 C12H9ClN2O2
2-Hydroxy-3-Amino-5-Bromopyridine 2-Hydroxy-3-Amino-5-Bromopyridine 98786-86-3 C5H5BrN2O
2-Methoxy-3-Nitro-5-Picoline 2-Methoxy-3-Nitro-5-Picoline 33252-62-9 C7H8N2O3
2-Methoxy-5-Iodopyridine 2-Methoxy-5-Iodopyridine 13472-61-2 C6H6INO
Methyl  2-Fluoroisonicotinate Methyl 2-Fluoroisonicotinate 455-69-6 C7H6FNO2
2-Aminomethyl-5-bromopyridine 2-Aminomethyl-5-bromopyridine 173999-23-0 C6H7BrN2
TERT-BUTYL CARBAZATE TERT-BUTYL CARBAZATE 3346-63-2 C5H6N4O2
3-METHYLPYRIDINE-2-AMIDOXIME 3-METHYLPYRIDINE-2-AMIDOXIME 690632-33-8 C7H9N3O
2,4-Dimethyl-3-nitropyridine 2,4-Dimethyl-3-nitropyridine 1074-76-6 C7H8N2O2
1-METHYL-4-(6-AMINOPYRIDIN-3-YL)PIPERAZINE 1-METHYL-4-(6-AMINOPYRIDIN-3-YL)PIPERAZINE 571189-49-6 C10H16N4
ETHYL 3-BROMOPYRIDINE-4-CARBOXYLATE ETHYL 3-BROMOPYRIDINE-4-CARBOXYLATE 13959-01-8 C8H8BrNO2
Ethyl 6-chloro-5-nitro-3-pyridinecarboxylate Ethyl 6-chloro-5-nitro-3-pyridinecarboxylate 171876-22-5 C8H7ClN2O4
tert-butyl 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydropyridine-1(2H)-carboxylate tert-butyl 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydropyridine-1(2H)-carboxylate 865245-32-5 C16H28BNO4
2-Bromo-6-trifluoromethyl-pyridin-3-ylamine 2-Bromo-6-trifluoromethyl-pyridin-3-ylamine 117519-16-1 C6H4BrF3N2
4-Chloro-2-cyano-6-methylpyrimidine 4-Chloro-2-cyano-6-methylpyrimidine 104711-65-1 C7H5ClN2
4-bromo-3,5-difluoropyridine 4-bromo-3,5-difluoropyridine 1092352-40-3 C5H2BrF2N
2,5-Difluoro-4-iodopyridine 2,5-Difluoro-4-iodopyridine 1017793-20-2 C5H2F2IN
2-(5-Aminopyridin-2-yl)-2-methylpropanenitrile 2-(5-Aminopyridin-2-yl)-2-methylpropanenitrile 1226776-95-9 C9H11N3
4-amino-2-chloro-5-fluoropyridine 4-amino-2-chloro-5-fluoropyridine 89510-90-7 C5H4ClFN2
DIMETHYL 4-(4-METHOXYPHENYL)-2,6-DIMETHYL-1,4-DIHYDROPYRIDINE-3,5-DICARBOXYLATE DIMETHYL 4-(4-METHOXYPHENYL)-2,6-DIMETHYL-1,4-DIHYDROPYRIDINE-3,5-DICARBOXYLATE 73257-47-3 C18H21NO5
4-(4-(DIHEXADECYLAMINO)STYRYL)-N-METHYLPYRIDINIUM IODIDE 4-(4-(DIHEXADECYLAMINO)STYRYL)-N-METHYLPYRIDINIUM IODIDE 114041-00-8 C46H79IN2
PYRIDINE-2,3-DICARBONITRILE PYRIDINE-2,3-DICARBONITRILE 17132-78-4 C7H3N3
4-HYDROXYPYRIDINE 4-HYDROXYPYRIDINE 426-64-2 C18H20F14O4
PIPERIDINE-4-CARBOXYLIC ACID (6-METHYL-PYRIDIN-2-YL)-AMIDE PIPERIDINE-4-CARBOXYLIC ACID (6-METHYL-PYRIDIN-2-YL)-AMIDE 110105-99-2 C12H17N3O
METHYL 5,6-DICHLORONICOTINATE METHYL 5,6-DICHLORONICOTINATE 56055-54-0 C7H5Cl2NO2
2-BENZYLAMINO-4-METHYLPYRIDINE 2-BENZYLAMINO-4-METHYLPYRIDINE 58088-62-3 C13H14N2
Furo[2,3-c]pyridine-5-methanol (9CI) Furo[2,3-c]pyridine-5-methanol (9CI) 478148-60-6 C8H7NO2
Pyridine, 3-(3-pyrrolidinyl)-, (+)- (9CI) Pyridine, 3-(3-pyrrolidinyl)-, (+)- (9CI) 498548-11-1 C9H12N2
Pyrimidine, 4-amino-6-fluoro-5-methyl- (8CI) Pyrimidine, 4-amino-6-fluoro-5-methyl- (8CI) 18260-69-0 C5H6FN3
1,1'-DIETHYL-4,4'-BIPYRIDINIUM DIBROMIDE 1,1'-DIETHYL-4,4'-BIPYRIDINIUM DIBROMIDE 53721-12-3 C14H18Br2N2
2-(4-chlorophenyl)pyridine 2-(4-chlorophenyl)pyridine 5969-83-5 C11H8ClN
METHYL 6-(1-PYRROLIDINYL)NICOTINATE METHYL 6-(1-PYRROLIDINYL)NICOTINATE 210963-94-3 C11H14N2O2
3-BROMO-5-(4-FLUOROPHENYL)PYRIDINE 3-BROMO-5-(4-FLUOROPHENYL)PYRIDINE 675590-04-2 C11H7BrFN
1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-5-methoxy-(9CI) 1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-5-methoxy-(9CI) 412030-10-5 C8H10N2O
2-Pyridinemethanol,5-chloro-(9CI) 2-Pyridinemethanol,5-chloro-(9CI) 209526-98-7 C6H6ClNO
Pyridine,3,5-difluoro-,1-oxide(9CI) Pyridine,3,5-difluoro-,1-oxide(9CI) 210169-07-6 C5H3F2NO
1H-Pyrrolo[3,2-b]pyridine-5-carbonitrile 1H-Pyrrolo[3,2-b]pyridine-5-carbonitrile 146767-63-7 C8H5N3
2-CHLORO-5-FLUORO-4-(HYDROXYMETHYL)PYRIDINE 2-CHLORO-5-FLUORO-4-(HYDROXYMETHYL)PYRIDINE 884494-86-4 C6H5ClFNO
2,6-dihydroxy-3-cyanopyridine 2,6-dihydroxy-3-cyanopyridine 35441-10-2 C6H4N2O2
4-CYANO-PYRIDINE-2-METHANOL 4-CYANO-PYRIDINE-2-METHANOL 51454-63-8 C7H6N2O
4-Pyridinol,2-methoxy-(6CI,9CI) 4-Pyridinol,2-methoxy-(6CI,9CI) 66080-45-3 C6H7NO2
3-Pyridinol,6-fluoro-5-methyl-(9CI) 3-Pyridinol,6-fluoro-5-methyl-(9CI) 186593-50-0 C6H6FNO
3-BROMO-4-CHLOROPYRIDINE HCL 3-BROMO-4-CHLOROPYRIDINE HCL 181256-18-8 C5H4BrCl2N
mexidol mexidol 127464-43-1 C8H11NO.C4H6O4
N-(4-HYDROXYMETHYL-PYRIDIN-2-YL)-2,2-DIMETHYL-PROPIONAMIDE N-(4-HYDROXYMETHYL-PYRIDIN-2-YL)-2,2-DIMETHYL-PROPIONAMIDE 551950-45-9 C11H16N2O2
Iodides Iodides C5H2BrClIN
4-(2-TETRAHYDRO-1H-PYRROL-1-YLETHYL)PYRIDINE 4-(2-TETRAHYDRO-1H-PYRROL-1-YLETHYL)PYRIDINE 67580-65-8 C11H16N2
2-CHLORO-3,5-DIIODOPYRIDINE 2-CHLORO-3,5-DIIODOPYRIDINE 856169-60-3 C5H2ClI2N
[5-(METHOXYCARBONYL)PYRIDIN-3-YL]BORONIC ACID [5-(METHOXYCARBONYL)PYRIDIN-3-YL]BORONIC ACID 871329-53-2 C7H8BNO4
4-BROMO-2,6-DIAMINOPYRIDINE 4-BROMO-2,6-DIAMINOPYRIDINE C5H6BrN3
2-(4-CHLORO-2-METHYLPHENOXY)-3-NITROPYRIDINE 2-(4-CHLORO-2-METHYLPHENOXY)-3-NITROPYRIDINE 465514-31-2 C12H9ClN2O3
4-Chloro-2-pyridinemethanamine 4-Chloro-2-pyridinemethanamine 180748-30-5 C6H7ClN2
5-(1-Methylethyl)-2-pyridinamine 5-(1-Methylethyl)-2-pyridinamine 603310-75-4 C8H12N2
3-BOCAMINO-4-BROMOPYRIDINE 3-BOCAMINO-4-BROMOPYRIDINE 885275-14-9 C10H13BrN2O2
4-(4-CHLOROBENZOYL)PYRIDINE 4-(4-CHLOROBENZOYL)PYRIDINE 14548-48-2 C12H8ClNO
2-AMINO-6-METHYLPYRIDINE-3,5-DICARBONITRILE 2-AMINO-6-METHYLPYRIDINE-3,5-DICARBONITRILE 78473-11-7 C8H6N4
6-CYANO-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 6-CYANO-IMIDAZO[1,2-A]PYRIDINE-2-CARBOXYLIC ACID ETHYL ESTER 214958-33-5 C11H9N3O2
2-AMINO-3-CYANO-4,6-DIMETHYLPYRIDINE 2-AMINO-3-CYANO-4,6-DIMETHYLPYRIDINE 5468-34-8 C8H9N3
2-BENZYL-OCTAHYDRO-PYRROLO[3,4-C]PYRIDINE 2-BENZYL-OCTAHYDRO-PYRROLO[3,4-C]PYRIDINE 351370-98-4 C14H20N2
BENZYL 2-OXO-1,2-DIHYDROPYRIDIN-3-YLCARBAMATE BENZYL 2-OXO-1,2-DIHYDROPYRIDIN-3-YLCARBAMATE 147269-67-8 C13H12N2O3
4-BROMOPYRIDINE 4-BROMOPYRIDINE C5H4BrN
2-MERCAPTO-6-METHYLPYRIDINE  97 2-MERCAPTO-6-METHYLPYRIDINE 97 18368-57-5 C6H7NS
2-ACETYL-6-METHOXYPYRIDINE  97 2-ACETYL-6-METHOXYPYRIDINE 97 21190-93-2 C8H9NO2
4-PYRIDYLACETIC ACID HYDROCHLORIDE 4-PYRIDYLACETIC ACID HYDROCHLORIDE 28356-58-3 C7H7NO2
5-Isopropyl-3-methyl 2-formyl-1,4-dihydro-6-methyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate 5-Isopropyl-3-methyl 2-formyl-1,4-dihydro-6-methyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate 75530-60-8 C19H20N2O7
TERT-BUTYL 5-BROMOPYRIDINE-2-CARBOXYLATE 98 TERT-BUTYL 5-BROMOPYRIDINE-2-CARBOXYLATE 98 845306-08-3 C10H12BrNO2
3,5-DICHLORO-4-AMINOPYRIDINE 3,5-DICHLORO-4-AMINOPYRIDINE 228809-78-7 C5H4Cl2N2
2-ACETYLAMINO-ISONICOTINIC ACID 2-ACETYLAMINO-ISONICOTINIC ACID 54221-95-3 C8H8N2O3
3-TRIFLUOROMETHYL-2-FORMYLPYRIDINE 3-TRIFLUOROMETHYL-2-FORMYLPYRIDINE 131747-62-1 C7H4F3NO
6,6'-DITHIODINICOTINIC ACID 6,6'-DITHIODINICOTINIC ACID 15658-35-2 C12H8N2O4S2
4-ETHYL-2-METHYLPYRIDINE 4-ETHYL-2-METHYLPYRIDINE 536-88-9 C8H11N
IMIDAZO[1,2-A]PYRIDINE-6-CARBONITRILE IMIDAZO[1,2-A]PYRIDINE-6-CARBONITRILE 106850-34-4 C8H5N3
1-(2-CHLORO-3-PYRIDYL)-2,5-DIHYDRO-1H-PYRROLE-2,5-DIONE 1-(2-CHLORO-3-PYRIDYL)-2,5-DIHYDRO-1H-PYRROLE-2,5-DIONE 278610-39-2 C9H5ClN2O2
2-CHLOROPYRIDO[2,3-D]PYRIMIDINE-4(1H)-THIONE 2-CHLOROPYRIDO[2,3-D]PYRIMIDINE-4(1H)-THIONE 91996-76-8 C7H4ClN3S
2-FLUORO-3-METHYL-PYRIDINE-5-CARBOXYLIC ACID 2-FLUORO-3-METHYL-PYRIDINE-5-CARBOXYLIC ACID 885267-35-6 C7H6FNO2
3,5-BIS(TRIFLUOROMETHYL)PYRIDINE 3,5-BIS(TRIFLUOROMETHYL)PYRIDINE 20857-47-0 C7H3F6N
6-CHLORO-IMIDAZO[1,2-A]PYRIDINE-8-CARBOXYLIC ACID 6-CHLORO-IMIDAZO[1,2-A]PYRIDINE-8-CARBOXYLIC ACID 155735-02-7 C8H5ClN2O2
2,5-DICHLORO-3-IODOPYRIDINE 2,5-DICHLORO-3-IODOPYRIDINE 942206-23-7 C5H2Cl2IN
TIMTEC-BB SBB010636 TIMTEC-BB SBB010636 115122-63-9 C9H9NO3
3-IODOPYRIDINE-4-CARBONITRILE 3-IODOPYRIDINE-4-CARBONITRILE 10386-28-4 C6H3IN2
1,2,3,4-TETRAHYDRO-[2,7]NAPHTHYRIDINE 1,2,3,4-TETRAHYDRO-[2,7]NAPHTHYRIDINE 108749-08-2 C8H10N2
6-HYDROXYNICOTINIC ACID ETHYL ESTER 6-HYDROXYNICOTINIC ACID ETHYL ESTER 18617-50-0 C8H9NO3
2-(BENZYLOXY)-3-BROMOPYRIDINE 2-(BENZYLOXY)-3-BROMOPYRIDINE 52200-49-4 C12H10BrNO
3-Amino-2-[4-butoxycarbonyl(piperazino)]pyridine 3-Amino-2-[4-butoxycarbonyl(piperazino)]pyridine 111669-25-1 C14H22N4O2
disodium 4-[[5-(aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-6-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]benzene-1,3-disulphonate disodium 4-[[5-(aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-6-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]benzene-1,3-disulphonate 70865-29-1 C18H17Cl2N8NaO9S2
(4-Chloro-3-pyridinyl)methanol (4-Chloro-3-pyridinyl)methanol 189449-41-0 C6H6ClNO
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