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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-3-(trifluoromethyl)-2-pyridinecarbonitrile 5-Bromo-3-(trifluoromethyl)-2-pyridinecarbonitrile 1214377-57-7 C7H2BrF3N2
2,5-DIBROMONICOTINALDEHYDE 2,5-DIBROMONICOTINALDEHYDE 852181-11-4 C6H3Br2NO
2-OXO-6-PHENYL-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID 2-OXO-6-PHENYL-1,2-DIHYDRO-PYRIDINE-3-CARBOXYLIC ACID 56162-63-1 C12H9NO3
ETHYL 6-(TERT-BUTYL)-3-CYANO-2-HYDROXYISONICOTINATE ETHYL 6-(TERT-BUTYL)-3-CYANO-2-HYDROXYISONICOTINATE 100616-09-9 C13H16N2O3
4-(MORPHOLINE-4-SULFONYL)-BENZENESULFONYL CHLORIDE 4-(MORPHOLINE-4-SULFONYL)-BENZENESULFONYL CHLORIDE 465514-13-0 C10H12ClNO5S2
2,3,5-TRIFLUOROISONICOTINIC ACID 2,3,5-TRIFLUOROISONICOTINIC ACID C6H2F3NO2
Pyrido[3,4-d]pyrimidine, 2,4-dichloro-5,6,7,8-tetrahydro-7-(phenylmethyl)- Pyrido[3,4-d]pyrimidine, 2,4-dichloro-5,6,7,8-tetrahydro-7-(phenylmethyl)- 1059735-34-0 C14H13Cl2N3
3,5-DIETHYL-2-N-PROPYLPYRIDINE 3,5-DIETHYL-2-N-PROPYLPYRIDINE 4808-75-7 C12H19N
5-FLUORO-2-METHOXYPYRIDINE-3-BORONIC ACID PINACOL ESTER 5-FLUORO-2-METHOXYPYRIDINE-3-BORONIC ACID PINACOL ESTER 1083168-95-9 C12H17BFNO3
3-Quinolinamine,5,6,7,8-tetrahydro-(9CI) 3-Quinolinamine,5,6,7,8-tetrahydro-(9CI) 151224-99-6 C9H12N2
3-Pyridinemethanamine,2-methoxy-(9CI) 3-Pyridinemethanamine,2-methoxy-(9CI) 354824-19-4 C7H10N2O
2-Pyridinamine,5-fluoro-6-methyl-(9CI) 2-Pyridinamine,5-fluoro-6-methyl-(9CI) 110919-71-6 C6H7FN2
2,6-Dichloropyridine-4-boronicacid 2,6-Dichloropyridine-4-boronicacid 1072951-54-2 C5H4BCl2NO2
4-Amino-3-fluoropyridine 4-Amino-3-fluoropyridine 2447-88-3 C12H15Cl2NO
5-fluoro-2-methoxy-3-pyridineboronic acid 5-fluoro-2-methoxy-3-pyridineboronic acid 957120-32-0 C6H7BFNO3
2-Pyridinecarboxylicacid,3,5-dimethyl-(9CI) 2-Pyridinecarboxylicacid,3,5-dimethyl-(9CI) 4733-68-0 C8H9NO2
4-BROMO-3,5-DIMETHYLPYRIDINE 4-BROMO-3,5-DIMETHYLPYRIDINE 201286-65-9 C7H8BrN
2-Chloro-4-methoxy-5-nitropyridine 2-Chloro-4-methoxy-5-nitropyridine 607373-83-1 C6H5ClN2O3
PIPERIDINE-4-CARBOXYLIC ACID (4-METHYL-PYRIDIN-2-YL)-AMIDE PIPERIDINE-4-CARBOXYLIC ACID (4-METHYL-PYRIDIN-2-YL)-AMIDE 865078-92-8 C12H17N3O
6-METHYL-4-(TRIFLUOROMETHYL)-2(1H)-PYRIDONE 6-METHYL-4-(TRIFLUOROMETHYL)-2(1H)-PYRIDONE 22123-19-9 C7H6F3NO
2-CHLORO-5-METHYLPYRIDINE-3-CARBALDEHYDE 2-CHLORO-5-METHYLPYRIDINE-3-CARBALDEHYDE 92444-99-0 C7H6ClNO
4-FLUORO-PYRIDINE-2-CARBOXYLIC ACID 4-FLUORO-PYRIDINE-2-CARBOXYLIC ACID 886371-78-4 C6H4FNO2
2-Pyridinecarboxylic acid, 4-hydroxy-, methyl ester (9CI) 2-Pyridinecarboxylic acid, 4-hydroxy-, methyl ester (9CI) 473269-77-1 C7H7NO3
(2E)-3-[6-(TRIFLUOROMETHYL)PYRIDIN-3-YL]PROPENOICACID
(2E)-3-[6-(TRIFLUOROMETHYL)PYRIDIN-3-YL]PROPENOICACID 773131-93-4 C9H6F3NO2
3,5,6-Trichloropyrid 3,5,6-Trichloropyrid
6-HYDROXY-3-PYRIDINESULPHONIC ACID 6-HYDROXY-3-PYRIDINESULPHONIC ACID 6684-46-4 C5H5NO4S
2-Bromo-5-fluoroisonicotinic acid 2-Bromo-5-fluoroisonicotinic acid 885588-12-5 C6H3BrFNO2
5-hydroxypyridine-2-carbaldehyde 5-hydroxypyridine-2-carbaldehyde 31191-08-9 C6H5NO2
5-Chloro-2-fluoro-4-methylpyridine 5-Chloro-2-fluoro-4-methylpyridine C6H5ClFN
N-Ethyl 5-bromopicolinamide N-Ethyl 5-bromopicolinamide 845305-88-6 C8H9BrN2O
3,4-Pyridinediamine,5-methyl-(9CI) 3,4-Pyridinediamine,5-methyl-(9CI) 13958-86-6 C6H9N3
1H-Pyrazolo[4,3-b]pyridine,3-methyl-(9CI) 1H-Pyrazolo[4,3-b]pyridine,3-methyl-(9CI) 194278-45-0 C7H7N3
1H-Pyrrolo[2,3-c]pyridine,7-methoxy-(9CI) 1H-Pyrrolo[2,3-c]pyridine,7-methoxy-(9CI) 160590-40-9 C8H8N2O
1-(5-Methyl-2-pyridinyl)-4-piperidinol 1-(5-Methyl-2-pyridinyl)-4-piperidinol 158181-84-1 C11H16N2O
4-chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate 4-chloro-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate 945666-87-5 C10H10ClNO2
6-BROMO-2-METHYLPYRIDINE-3-BORONIC ACID 6-BROMO-2-METHYLPYRIDINE-3-BORONIC ACID 1072944-22-9 C6H7BBrNO2
3,5-Difluoro-4-pyridinecarboxaldehyde 3,5-Difluoro-4-pyridinecarboxaldehyde 870234-98-3 C6H3F2NO
3-AMINO-2-CHLORO-ISONICOTINAMIDE 3-AMINO-2-CHLORO-ISONICOTINAMIDE 342899-34-7 C6H6ClN3O
6-CHLORO-2-IODO-3-(TRIFLUOROMETHYL)PYRIDINE 6-CHLORO-2-IODO-3-(TRIFLUOROMETHYL)PYRIDINE 518057-64-2 C6H2ClF3IN
3,6-Dibromo-2-chloropyridine 3,6-Dibromo-2-chloropyridine 942206-18-0 C5H2Br2ClN
6-Chloromethyl-2-cyanopyridine 6-Chloromethyl-2-cyanopyridine 135450-23-6 C7H5ClN2
6-MORPHOLINONICOTINALDEHYDE 6-MORPHOLINONICOTINALDEHYDE 173282-60-5 C10H12N2O2
Methyl 4-hydroxynicotinate Methyl 4-hydroxynicotinate 67367-24-2 C7H7NO3
2,6-Pyridinedicarbonitrile 2,6-Pyridinedicarbonitrile 2893-33-6 C7H3N3
3-(PYRROL-1-YLMETHYL)PYRIDINE 3-(PYRROL-1-YLMETHYL)PYRIDINE 80866-95-1 C10H10N2
Indibulin Indibulin 204205-90-3 C22H16ClN3O2
2-(N-Methylaminocarbonyl)-5-pyridineboronic acid pincol ester 2-(N-Methylaminocarbonyl)-5-pyridineboronic acid pincol ester 945863-21-8 C13H19BN2O3
1,3-DIMETHYL-2-FLUOROPYRIDINIUM TOLUENE-4-SULFONATE 1,3-DIMETHYL-2-FLUOROPYRIDINIUM TOLUENE-4-SULFONATE 59387-91-6 C14H16FNO3S
4-PIPERIDIN-4-YLMETHYLPYRIDINE DIHYDROCHLORIDE 4-PIPERIDIN-4-YLMETHYLPYRIDINE DIHYDROCHLORIDE 1172465-66-5 C11H18Cl2N2
Methyl 5-nitro-2-pyridinecarboxylate Methyl 5-nitro-2-pyridinecarboxylate 29682-14-2 C7H6N2O4
2-BROMO-3-(CHLOROMETHYL)PYRIDINE 2-BROMO-3-(CHLOROMETHYL)PYRIDINE 89581-84-0 C6H5Cl2N
2,6-DICHLORO-4-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 2,6-DICHLORO-4-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE 408492-27-3 C11H14BCl2NO2
6-CHLORO-4-IODOPYRIDIN-3-AMINE 6-CHLORO-4-IODOPYRIDIN-3-AMINE 351227-42-4 C5H4ClIN2
PYRIDINE, 5-BROMO-2-(DIFLUOROMETHOXY)- PYRIDINE, 5-BROMO-2-(DIFLUOROMETHOXY)- 899452-26-7 C6H4BrF2NO
6-Ethyl-3-pyridinamine 6-Ethyl-3-pyridinamine 126553-00-2 C7H10N2
Furo[3,2-b]pyridin-3(2H)-one(9CI) Furo[3,2-b]pyridin-3(2H)-one(9CI) 119293-03-7 C7H5NO2
3-Pyridinemethanol,2-methoxy-(9CI) 3-Pyridinemethanol,2-methoxy-(9CI) 112197-16-7 C7H9NO2
2,6-DIMETHYL-PYRIDINE-3-BORONIC ACID 2,6-DIMETHYL-PYRIDINE-3-BORONIC ACID 693774-55-9 C7H10BNO2
3-(4-AMINO-PYRIDIN-3-YL)-ACRYLIC ACID ETHYL ESTER 3-(4-AMINO-PYRIDIN-3-YL)-ACRYLIC ACID ETHYL ESTER 104830-07-1 C10H12N2O2
5-Amino-2-ethoxypyridine 5-Amino-2-ethoxypyridine 52025-34-0 C7H10N2O
2-(BENZYLAMINO)-3-TRIFLUOROMETHYLPYRIDINE 2-(BENZYLAMINO)-3-TRIFLUOROMETHYLPYRIDINE 886501-07-1 C13H11F3N2
2,3-Dichloro-4-iodopyridine 2,3-Dichloro-4-iodopyridine 889865-45-6 C5H2Cl2IN
5-[3-(Ethylsulfonyl)phenyl]-3,8-dimethyl-N-(1-methyl-4-piperidinyl)-9H-pyrido[2,3-b]indole-7-carboxamide 5-[3-(Ethylsulfonyl)phenyl]-3,8-dimethyl-N-(1-methyl-4-piperidinyl)-9H-pyrido[2,3-b]indole-7-carboxamide 934541-31-8 C28H32N4O3S
4-Aminopicolinic acid hydrochloride 4-Aminopicolinic acid hydrochloride 1291487-29-0 C6H7ClN2O2
2,6-DICHLOROPYRIDINE-4-CARBOTHIOAMIDE 2,6-DICHLOROPYRIDINE-4-CARBOTHIOAMIDE 175204-46-3 C6H4Cl2N2S
3-FLUORO-2-IODOPYRIDINE-4-CARBOXYLIC ACID 3-FLUORO-2-IODOPYRIDINE-4-CARBOXYLIC ACID 153035-09-7 C6H3FINO2
7-BROMOPYRIDO[2,3-B]PYRAZINE-2,3(1H,4H)-DIONE 7-BROMOPYRIDO[2,3-B]PYRAZINE-2,3(1H,4H)-DIONE 168123-82-8 C7H4BrN3O2
2-BROMOPYRIDINE-4-N-METHYLCARBOXAMIDE 2-BROMOPYRIDINE-4-N-METHYLCARBOXAMIDE 337536-01-3 C7H7BrN2O
2-AMINO-6-CHLORO-3,5-DICYANOPYRIDINE 2-AMINO-6-CHLORO-3,5-DICYANOPYRIDINE 51768-01-5 C7H3ClN4
2-(BOC-AMINO)-6-PICOLINE 2-(BOC-AMINO)-6-PICOLINE 90101-22-7 C11H16N2O2
1-(PYRIDIN-4-YL)-PIPERIDINE-4-CARBOXYLIC ACID 1-(PYRIDIN-4-YL)-PIPERIDINE-4-CARBOXYLIC ACID 93913-86-1 C11H14N2O2
1-(6-METHYL-PYRIDIN-2-YL)-ETHYLAMINE 1-(6-METHYL-PYRIDIN-2-YL)-ETHYLAMINE 58088-67-8 C8H12N2
NICOTINANILIDE NICOTINANILIDE 1752-96-1 C12H10N2O
4'-(4-METHOXYPHENYL)-2,2':6',2''-TERPYRIDINE 4'-(4-METHOXYPHENYL)-2,2':6',2''-TERPYRIDINE 13104-56-8 C22H17N3O
N-Boc-3,4-dihydro-2H-pyridine N-Boc-3,4-dihydro-2H-pyridine 131667-57-7 C10H17NO2
3,5-DIBROMO-4-NITROPYRIDINE 3,5-DIBROMO-4-NITROPYRIDINE 121263-11-4 C5H2Br2N2O2
2-FLUORO-6-HYDROXYMETHYL PYRIDINE 2-FLUORO-6-HYDROXYMETHYL PYRIDINE 315180-17-7 C6H6FNO
3-AMINO-5-HYDROXYMETHYLPYRIDINE 3-AMINO-5-HYDROXYMETHYLPYRIDINE 443649-18-1 C6H8N2O
ETHYL IMIDAZO[1,2-A]PYRIDINE-7-CARBOXYLATE 98 ETHYL IMIDAZO[1,2-A]PYRIDINE-7-CARBOXYLATE 98 372147-49-4 C10H10N2O2
2-CHLORO-5-METHYLPYRIDIN-3-AMINE 2-CHLORO-5-METHYLPYRIDIN-3-AMINE C6H7ClN2
2-BROMO-3-FLUORO-4-METHYLPYRIDINE 2-BROMO-3-FLUORO-4-METHYLPYRIDINE C6H5BrFN
3,5-DIBROMO-2-IODOPYRIDINE 3,5-DIBROMO-2-IODOPYRIDINE 436799-34-7 C5H2Br2IN
3-BROMO-2-CHLORO-4-IODOPYRIDINE 3-BROMO-2-CHLORO-4-IODOPYRIDINE 884494-53-5 C5H2BrClIN
Copper Pyrithione Copper Pyrithione 14915-37-8 C10H8CuN2O2S2
2-AMINO-3,6-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 2-AMINO-3,6-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE 675602-89-8 C6H3F5N2
2-CHLORO-5-IODO-PYRIDIN-3-YLAMINE 2-CHLORO-5-IODO-PYRIDIN-3-YLAMINE 426463-09-4 C5H4ClIN2
N-Boc-5-amino-2-fluoropyridine N-Boc-5-amino-2-fluoropyridine 171178-41-9 C10H13FN2O2
5-CYANOPYRIDINE-2-BORONIC ACID PINACOL ESTER 5-CYANOPYRIDINE-2-BORONIC ACID PINACOL ESTER 1073353-83-9 C12H15BN2O2
2-Pyridylamid oxime 2-Pyridylamid oxime 1772-01-6 C6H7N3O
2-HYDROXY-4-FLUOROPYRIDINE 2-HYDROXY-4-FLUOROPYRIDINE 96530-75-5 C5H4FNO
2-CHLORO-3-CYANOPYRIDIN-4-YLBORONIC ACID 2-CHLORO-3-CYANOPYRIDIN-4-YLBORONIC ACID 878194-88-8 C6H4BClN2O2
2,5,6-TRICHLORO-3-TRIFLUOROMETHYLPYRIDINE 2,5,6-TRICHLORO-3-TRIFLUOROMETHYLPYRIDINE 80289-91-4 C6HCl3F3N
3-Pyridinemethanamine 1-oxide 3-Pyridinemethanamine 1-oxide 106940-10-7 C6H8N2O
Ethyl 6-bromoimidazo[1,2-a]pyridine-2-carboxylate Ethyl 6-bromoimidazo[1,2-a]pyridine-2-carboxylate 67625-37-0 C10H9BrN2O2
2-Fluoro-5-methyl-3-nitropyridine 2-Fluoro-5-methyl-3-nitropyridine 19346-44-2 C6H5FN2O2
4-Amino-3-methoxypyridine 4-Amino-3-methoxypyridine 52334-90-4 C6H8N2O
4-(6-Chloro-pyrazin-2-yl)-3-methyl-benzoicacid 4-(6-Chloro-pyrazin-2-yl)-3-methyl-benzoicacid 1020718-71-1 C12H9ClN2O2
1H-Pyrrolo[3,2-c]pyridine, 6-methyl- 1H-Pyrrolo[3,2-c]pyridine, 6-methyl- 183586-34-7 C8H8N2
2,4,5-Triamino-pyridine 2,4,5-Triamino-pyridine 23244-87-3 C5H8N4
4-Amino-5-nitro-2-pyridinol 4-Amino-5-nitro-2-pyridinol 99479-77-3 C5H5N3O3
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