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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-BROMO-4,6-DIMETHYL-2-OXO-1,2-DIHYDRO-3-PYRIDINECARBONITRILE 5-BROMO-4,6-DIMETHYL-2-OXO-1,2-DIHYDRO-3-PYRIDINECARBONITRILE 23819-87-6 C8H7BrN2O
3-BROMO-2-FLUORO-4-IODOPYRIDINE 3-BROMO-2-FLUORO-4-IODOPYRIDINE 884494-52-4 C5H2BrFIN
6-(DIMETHYLAMINO)NICOTINONITRILE 6-(DIMETHYLAMINO)NICOTINONITRILE 154924-17-1 C8H9N3
4H-PYRIDO[1,2-A]PYRIMIDIN-4-ONE, 7-METHYL-2-(4-MORPHOLINYL)-9-[1-(PHENYLAMINO)ETHYL]- 4H-PYRIDO[1,2-A]PYRIMIDIN-4-ONE, 7-METHYL-2-(4-MORPHOLINYL)-9-[1-(PHENYLAMINO)ETHYL]- 663619-89-4 C21H24N4O2
5-CHLORO-3-CYANOPYRIDINE 5-CHLORO-3-CYANOPYRIDINE 51269-82-0 C6H3ClN2
2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one 2H-Pyrido[3,2-b][1,4]oxazin-3(4H)-one 20348-09-8 C7H6N2O2
3-AMINO-2-(METHYLAMINO)-5-(TRIFLUOROMETHYL)PYRIDINE 3-AMINO-2-(METHYLAMINO)-5-(TRIFLUOROMETHYL)PYRIDINE 172648-55-4 C7H8F3N3
2,3-DICHLOROPYRIDINE-4-BORONIC ACID 2,3-DICHLOROPYRIDINE-4-BORONIC ACID C5H4BCl2NO2
3-CHLORO-2-(4-MORPHOLINO)PYRIDINE 3-CHLORO-2-(4-MORPHOLINO)PYRIDINE 54231-36-6 C9H11ClN2O
2-DIPHENYLPHOSPHINO-6-METHYLPYRIDINE 2-DIPHENYLPHOSPHINO-6-METHYLPYRIDINE 132682-77-0 C18H16NP
PYRIDINE-2-SULFONIC ACID PYRIDINE-2-SULFONIC ACID 15103-48-7 C5H5NO3S
2,5-DICHLOROPYRIDINE-3-CARBONYL CHLORIDE 2,5-DICHLOROPYRIDINE-3-CARBONYL CHLORIDE 78686-87-0 C6H2Cl3NO
4-ACETOXYMETHYLPYRIDINE 4-ACETOXYMETHYLPYRIDINE 1007-48-3 C8H9NO2
5H-CYCLOPENTA[B]PYRIDIN-7-OL, 6,7-DIHYDRO- 5H-CYCLOPENTA[B]PYRIDIN-7-OL, 6,7-DIHYDRO- 41598-71-4 C8H9NO
2,2-DIMETHYL-N-PYRIDIN-4-YL-PROPIONAMIDE 2,2-DIMETHYL-N-PYRIDIN-4-YL-PROPIONAMIDE 70298-89-4 C10H14N2O
2-AMINO-3-CHLORO-5-NITROPYRIDINE 2-AMINO-3-CHLORO-5-NITROPYRIDINE 22353-35-1 C5H4ClN3O2
2-Chloro-6-methoxyisonicotinoyl chloride 2-Chloro-6-methoxyisonicotinoyl chloride 116853-97-5 C7H5Cl2NO2
5-Bromo-2-iodo-3-methylpyridine 5-Bromo-2-iodo-3-methylpyridine 376587-52-9 C6H5BrIN
BENZYL 4-ISOCYANATOTETRAHYDRO-1(2H)-PYRIDINECARBOXYLATE BENZYL 4-ISOCYANATOTETRAHYDRO-1(2H)-PYRIDINECARBOXYLATE 220394-91-2 C14H16N2O3
4,6-DICHLORO-NICOTINAMIDE 4,6-DICHLORO-NICOTINAMIDE 70593-57-6 C6H4Cl2N2O
1-METHYL-5-OXO-PYRROLIDINE-3-CARBOXYLIC ACID 1-METHYL-5-OXO-PYRROLIDINE-3-CARBOXYLIC ACID 42346-68-9 C6H9NO3
1,3-Dihydro-2H-pyrrolo[3,2-b]pyridin-2-one 1,3-Dihydro-2H-pyrrolo[3,2-b]pyridin-2-one 32501-05-6 C7H6N2O
6-PHENYL-PYRIDIN-2-YLAMINE 6-PHENYL-PYRIDIN-2-YLAMINE 39774-25-9 C11H10N2
3-HYDROXY-2-PHENYLPYRIDINE 3-HYDROXY-2-PHENYLPYRIDINE 3308-02-9 C11H9NO
2,6-DICHLORO-3-HYDROXYPYRIDINE-4-CARBOXALDEHYDE 2,6-DICHLORO-3-HYDROXYPYRIDINE-4-CARBOXALDEHYDE 185423-26-1 C6H3Cl2NO2
5-BROMOPYRIDINE-2-CARBOXAMIDE 97%5-BROMOPICOLINAMIDE 5-BROMOPYRIDINE-2-CARBOXAMIDE 97%5-BROMOPICOLINAMIDE 90145-48-5 C6H5BrN2O
METHYL 5-BROMO-2-METHOXYNICOTINATE 98%METHYL 5-BROMO-2-METHOXY-3-PYRIDINECARBOXYLATE METHYL 5-BROMO-2-METHOXYNICOTINATE 98%METHYL 5-BROMO-2-METHOXY-3-PYRIDINECARBOXYLATE 122433-41-4 C8H8BrNO3
2,3-Dichloro-5-(trichloromethyl)pyridine 2,3-Dichloro-5-(trichloromethyl)pyridine 69045-83-6 C6H2Cl5N
2-BROMO-6-CHLORO-3-NITROPYRIDINE 2-BROMO-6-CHLORO-3-NITROPYRIDINE 91678-23-8 C5H2BrClN2O2
5-AMINOPYRIDINE-3-BORONIC ACID, PINACOL ESTER 5-AMINOPYRIDINE-3-BORONIC ACID, PINACOL ESTER 1073354-99-0 C11H17BN2O2
2-FLUORO-4-IODO-6-PICOLINE 2-FLUORO-4-IODO-6-PICOLINE 884494-45-5 C6H5FIN
6-Chloro-4-methylnicotinaldehyde 6-Chloro-4-methylnicotinaldehyde 884495-38-9 C7H6ClNO
6-AMINO-5-CHLORO-NICOTINONITRILE 6-AMINO-5-CHLORO-NICOTINONITRILE 156361-02-3 C6H4ClN3
3-BROMO-2-METHOXY-6-PICOLINE 3-BROMO-2-METHOXY-6-PICOLINE 717843-47-5 C7H8BrNO
5-METHOXYPYRIDINE-2-CARBOXYLIC ACID 5-METHOXYPYRIDINE-2-CARBOXYLIC ACID 29082-92-6 C7H7NO3
4-(4-FLUOROPHENYL)-1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 4-(4-FLUOROPHENYL)-1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 1978-61-6 C11H13ClFN
2,6-Pyridinedicarboxylic acid chloride 2,6-Pyridinedicarboxylic acid chloride 3739-94-4 C7H3Cl2NO2
BIS(1-METHYLPIPERIDIN-4-YL)AMINE BIS(1-METHYLPIPERIDIN-4-YL)AMINE 117927-28-3 C12H25N3
7H-CYCLOPENTA[B]PYRIDIN-7-ONE, 5,6-DIHYDRO- 7H-CYCLOPENTA[B]PYRIDIN-7-ONE, 5,6-DIHYDRO- 31170-78-2 C8H7NO
4-PHENYLPYRIDINE-2-CARBOXYLIC ACID 4-PHENYLPYRIDINE-2-CARBOXYLIC ACID 52565-56-7 C12H9NO2
5-BROMO-2-CHLOROPYRIDIN-3-YLBORONIC ACID 5-BROMO-2-CHLOROPYRIDIN-3-YLBORONIC ACID 1072944-19-4 C5H4BBrClNO2
6-BROMO-3H-IMIDAZO[4,5-B]PYRIDINE 6-BROMO-3H-IMIDAZO[4,5-B]PYRIDINE 28279-49-4 C6H4BrN3
5,6-Dimethoxy-2-(pyridine-4-yl)methylene-indan-1-one 5,6-Dimethoxy-2-(pyridine-4-yl)methylene-indan-1-one 4803-74-1 C17H15NO3
3-Cyano-2-hydroxypyridine 3-Cyano-2-hydroxypyridine 5657-63-6 C6H4N2O
5-Amino-3-methylpyridine-2-carbonitrile 5-Amino-3-methylpyridine-2-carbonitrile 252056-70-5 C7H7N3
Pyroxamide Pyroxamide 382180-17-8 C13H19N3O3
2.4.6-TRIMETHYL-3-NITROPYRIDINE 2.4.6-TRIMETHYL-3-NITROPYRIDINE 21203-55-4 C8H10N2O2
2-(CHLOROMETHYL)-6-METHYLPYRIDINE 2-(CHLOROMETHYL)-6-METHYLPYRIDINE 3099-29-4 C7H8ClN
5-(hydroxymethyl) pyridin-2(1H)-one 5-(hydroxymethyl) pyridin-2(1H)-one 109205-68-7 C6H7NO2
2-ACETAMIDOPYRIDINE-5-BORONIC ACID PINACOL ESTER, 97% 2-ACETAMIDOPYRIDINE-5-BORONIC ACID PINACOL ESTER, 97% 904326-87-0 C13H19BN2O3
METHYL 3-METHYLPYRIDINE-2-CARBOXYLATE METHYL 3-METHYLPYRIDINE-2-CARBOXYLATE 59718-84-2 C8H9NO2
5-Bromo-3-chloro-2-fluoropyridine 5-Bromo-3-chloro-2-fluoropyridine 38185-56-7 C5H2BrClFN
2-BROMO-3,5-DICHLOROISONICOTINIC ACID 2-BROMO-3,5-DICHLOROISONICOTINIC ACID 343781-56-6 C6H2BrCl2NO2
2-AMINO-4-METHYL-5-PYRIDINECARBOXYLIC ACID 2-AMINO-4-METHYL-5-PYRIDINECARBOXYLIC ACID 179555-11-4 C7H8N2O2
1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid 1-Methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid 3719-45-7 C7H7NO3
2,5,6-Trifluoronicotinic aicid nitrile 2,5,6-Trifluoronicotinic aicid nitrile 870065-73-9 C6HF3N2
3-PYRIDINAMINE, 6-(1-METHYLETHYL)- 3-PYRIDINAMINE, 6-(1-METHYLETHYL)- 405103-02-8 C8H12N2
2-CHLORO-6-METHYLPYRIDINE-4-CARBOXALDEHYDE 2-CHLORO-6-METHYLPYRIDINE-4-CARBOXALDEHYDE 479613-16-6 C7H6ClNO
2-CHLORO-5-FLUORO-PYRIDINE-3-CARBALDEHYDE 2-CHLORO-5-FLUORO-PYRIDINE-3-CARBALDEHYDE 851484-95-2 C6H3ClFNO
4-CHLORO-3-IODO-PYRIDIN-2-YLAMINE 4-CHLORO-3-IODO-PYRIDIN-2-YLAMINE 417721-69-8 C5H4ClIN2
Methyl 6-amino-3-bromopicolinate Methyl 6-amino-3-bromopicolinate 178876-83-0 C7H7BrN2O2
3,5-DIAMINOPYRIDINE 3,5-DIAMINOPYRIDINE 4318-78-9 C5H7N3
2(1H)-Pyridinone,3-chloro-4-hydroxy-(9CI) 2(1H)-Pyridinone,3-chloro-4-hydroxy-(9CI) 103792-81-0 C5H4ClNO2
4-Pyridinemethanamine,2-amino-(9CI) 4-Pyridinemethanamine,2-amino-(9CI) 199296-51-0 C6H9N3
2-Chloro-4-methylpyridine-3-carbonitrile 2-Chloro-4-methylpyridine-3-carbonitrile 65169-38-2 C7H5ClN2
2,4-DIBROMO-5-NITROPYRIDINE 2,4-DIBROMO-5-NITROPYRIDINE 4487-57-4 C5H2Br2N2O2
2-(ETHYLMETHYLAMINO)PYRIDINE 2-(ETHYLMETHYLAMINO)PYRIDINE 77200-12-5 C8H12N2
2-Cyano-3-chloro-5-(trifluoromethyl)-pyridine 2-Cyano-3-chloro-5-(trifluoromethyl)-pyridine 80194-70-3 C7H2ClF3N2
2-PHENYLSULFONYLPRIDINE 2-PHENYLSULFONYLPRIDINE 24244-60-8 C11H9NO2S
2-Amino-5-bromo-4-chloro-3-nitropyridine 2-Amino-5-bromo-4-chloro-3-nitropyridine 942947-95-7 C5H3BrClN3O2
3-BUTYLPYRIDINE 3-BUTYLPYRIDINE 539-32-2 C9H13N
CHIR-99021 CHIR-99021 252917-06-9 C22H18Cl2N8
3,5-DIMETHYLPYRIDINE-4-CARBOXALDEHYDE 3,5-DIMETHYLPYRIDINE-4-CARBOXALDEHYDE 201286-64-8 C8H9NO
3-METHYL-5-NITROPYRIDINE 3-METHYL-5-NITROPYRIDINE 6960-20-9 C6H6N2O2
4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine 4-chloro-2,3-dihydro-1H-pyrrolo[3,2-c]pyridine 494767-29-2 C7H7ClN2
Ethyl 6-aminonicotinate Ethyl 6-aminonicotinate 39658-41-8 C8H10N2O2
3-Chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid 3-Chloro-5-(trifluoromethyl)pyridine-2-carboxylic acid 80194-18-9 C46H44Cl3N7O9S2
5-BROMO-2-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE 5-BROMO-2-CHLORO-3-(TRIFLUOROMETHYL)PYRIDINE 211122-40-6 C6H2BrClF3N
2,5-Dichloro-4-iodopyridine 2,5-Dichloro-4-iodopyridine 796851-03-1 C5H2Cl2IN
BENZONITRILE, 4-[(4,6-DICHLORO-2-PYRIMIDINYL)AMINO]- BENZONITRILE, 4-[(4,6-DICHLORO-2-PYRIMIDINYL)AMINO]- 329187-59-9 C11H6Cl2N4
4-METHYL-PYRIDINE-2-CARBOXYLIC ACID 4-METHYL-PYRIDINE-2-CARBOXYLIC ACID 4021-08-3 C7H7NO2
2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride 2,3-Dihydro-1H-Pyrrolo[3,4-C]Pyridine dihydrochloride 6000-50-6 C7H9ClN2
GDC-0879 GDC-0879 905281-76-7 C19H18N4O2
TPEN TPEN 16858-02-9 C26H28N6
5-Bromo-2-hydroxy-3-(trifluoromethyl)pyridine 5-Bromo-2-hydroxy-3-(trifluoromethyl)pyridine 76041-79-7 C6H3BrF3NO
2-CHLORO-5-FLUORO-4-FORMYLPYRIDINE 2-CHLORO-5-FLUORO-4-FORMYLPYRIDINE 884494-54-6 C6H3ClFNO
2-CHLORO-5-FLUORO-3-IODOPYRIDINE 2-CHLORO-5-FLUORO-3-IODOPYRIDINE 884494-33-1 C5H2ClFIN
2,3,5-Trichloropyridine-4-carboxaldehyde 2,3,5-Trichloropyridine-4-carboxaldehyde 251997-31-6 C6H2Cl3NO
ISOPROPALIN ISOPROPALIN 33820-53-0 C15H23N3O4
1-PYRIDIN-4-YL-ETHANOL 1-PYRIDIN-4-YL-ETHANOL 42732-22-9 C7H9NO
C-(6-BROMO-PYRIDIN-3-YL)-METHYLAMINE C-(6-BROMO-PYRIDIN-3-YL)-METHYLAMINE 120740-10-5 C6H7BrN2
3-AMINO-2-CHLORO-6-(TRIFLUOROMETHYL)PYRIDINE 3-AMINO-2-CHLORO-6-(TRIFLUOROMETHYL)PYRIDINE 65182-56-1 C14H10N2O
2-AMINOMETHYL-3-METHYLPYRIDINE 2-AMINOMETHYL-3-METHYLPYRIDINE 153936-26-6 C7H10N2
3-AMINO-4-METHOXYPYRIDINE 3-AMINO-4-METHOXYPYRIDINE 33631-09-3 C6H8N2O
2,6-DIMETHOXY-3-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 2,6-DIMETHOXY-3-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 214360-59-5 C13H20BNO4
(R)-(+)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE (R)-(+)-2-(ALPHA-METHYLBENZYLAMINO)-5-NITROPYRIDINE 64138-65-4 C13H13N3O2
3-HYDROXY-5-NITROPYRIDINE 3-HYDROXY-5-NITROPYRIDINE 186593-26-0 C5H4N2O3
5-CHLORO-3-HYDROXYMETHYL-6-METHOXYPYRIDINE 5-CHLORO-3-HYDROXYMETHYL-6-METHOXYPYRIDINE 132865-53-3 C7H8ClNO2
(4-FLUORO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE (4-FLUORO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE 113248-64-9 C13H13FN2
2,5-DIMETHYL-1-(2-THIENYLMETHYL)-1H-PYRROLE-3-CARBOXYLIC ACID 2,5-DIMETHYL-1-(2-THIENYLMETHYL)-1H-PYRROLE-3-CARBOXYLIC ACID 306936-14-1 C12H13NO2S
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