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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-Pyridinemethanamine,6-methoxy-(9CI) 3-Pyridinemethanamine,6-methoxy-(9CI) 262295-96-5 C7H10N2O
3-Pyridinethiol,2-amino-(9CI) 3-Pyridinethiol,2-amino-(9CI) 110402-20-5 C5H6N2S
3-Pyridinemethanol,5-fluoro-(8CI,9CI) 3-Pyridinemethanol,5-fluoro-(8CI,9CI) 22620-32-2 C6H6FNO
5H-Cyclopenta[b]pyridin-3-amine,6,7-dihydro-(9CI) 5H-Cyclopenta[b]pyridin-3-amine,6,7-dihydro-(9CI) 178209-29-5 C8H10N2
5H-Cyclopenta[b]pyridin-7-amine,6,7-dihydro-,(7S)-(9CI) 5H-Cyclopenta[b]pyridin-7-amine,6,7-dihydro-,(7S)-(9CI) 502612-54-6 C8H10N2
Pyridine, 2-fluoro-6-methoxy- (9CI) Pyridine, 2-fluoro-6-methoxy- (9CI) 116241-61-3 C6H6FNO
Pyridine, 5-ethynyl-2-methoxy- (9CI) Pyridine, 5-ethynyl-2-methoxy- (9CI) 663955-59-7 C8H7NO
Cyclopropanamine, 1-(2-pyridinyl)- (9CI) Cyclopropanamine, 1-(2-pyridinyl)- (9CI) 503417-37-6 C8H10N2
Pyridine, 2-(1-methylethyl)-5-nitro- (9CI) Pyridine, 2-(1-methylethyl)-5-nitro- (9CI) 131941-21-4 C8H10N2O2
3,6-Dichloro-2-Picoline 3,6-Dichloro-2-Picoline 123280-64-8 C6H5Cl2N
Pyridine, 2,3-dichloro-4-methyl- (9CI) Pyridine, 2,3-dichloro-4-methyl- (9CI) 191419-07-5 C6H5Cl2N
2-amino-4-methoxypyridine-3-carbonitrile 2-amino-4-methoxypyridine-3-carbonitrile 98651-70-8 C7H7N3O
6-(2,2,2-TRIFLUOROETHOXY)NICOTINIC ACID 6-(2,2,2-TRIFLUOROETHOXY)NICOTINIC ACID 175204-90-7 C8H6F3NO3
(2-Chloropyridin-4-yl)methanamine (2-Chloropyridin-4-yl)methanamine 144900-57-2 C6H7ClN2
(S)-(-)-N-(5-NITRO-2-PYRIDYL)ALANINOL (S)-(-)-N-(5-NITRO-2-PYRIDYL)ALANINOL 115416-52-9 C8H11N3O3
3-NITRO-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE 3-NITRO-6,7-DIHYDRO-5H-CYCLOPENTA[B]PYRIDINE 84531-36-2 C8H8N2O2
6-CHLOROPYRIDINE-2,3-DICARBOXYLIC ACID DIMETHYL ESTER 6-CHLOROPYRIDINE-2,3-DICARBOXYLIC ACID DIMETHYL ESTER 32383-03-2 C9H8ClNO4
2-PYRIDINECARBOXYLIC ACID, 3-CHLORO-5-(TRIFLUOROMETHYL)-, ETHYL ESTER 2-PYRIDINECARBOXYLIC ACID, 3-CHLORO-5-(TRIFLUOROMETHYL)-, ETHYL ESTER 128073-16-5 C9H7ClF3NO2
PYRIDINE,3-CHLORO-5-ETHYNYL PYRIDINE,3-CHLORO-5-ETHYNYL 329202-22-4 C7H4ClN
Pyridine, 2-fluoro-3-methoxy- (9CI) Pyridine, 2-fluoro-3-methoxy- (9CI) 163234-74-0 C6H6FNO
Pyridine, 5-(chloromethyl)-2-methyl- (6CI,9CI) Pyridine, 5-(chloromethyl)-2-methyl- (6CI,9CI) 52426-66-1 C7H8ClN
Carbamic acid, (4-cyano-2-pyridinyl)-, 1,1-dimethylethyl ester (9CI) Carbamic acid, (4-cyano-2-pyridinyl)-, 1,1-dimethylethyl ester (9CI) 737000-78-1 C11H13N3O2
Pyrido[2,3-d]pyrimidine, 4,7-dichloro- (9CI) Pyrido[2,3-d]pyrimidine, 4,7-dichloro- (9CI) 552331-44-9 C7H3Cl2N3
5-BROMO-2-ETHYNYLPYRIDINE 5-BROMO-2-ETHYNYLPYRIDINE 111770-86-6 C7H4BrN
1H-Pyrrolo[2,3-c]pyridin-5-amine(9CI) 1H-Pyrrolo[2,3-c]pyridin-5-amine(9CI) 174610-12-9 C7H7N3
1-Benzyl-4-(3-nitropyridin-2-yl)piperazine 1-Benzyl-4-(3-nitropyridin-2-yl)piperazine 499771-07-2 C16H18N4O2
9-Benxyloxy-3-(2-Chloro ethyl)-2-methyl pyrido[1,2-a]pyrimidine-4-one 9-Benxyloxy-3-(2-Chloro ethyl)-2-methyl pyrido[1,2-a]pyrimidine-4-one 147687-17-0 C18H17ClN2O2
Methyl 1-(4-fluorophenyl)-6-oxo-1,6-dihydropyridine-3-carboxylate Methyl 1-(4-fluorophenyl)-6-oxo-1,6-dihydropyridine-3-carboxylate 929000-81-7 C13H10FNO3
2-Hydrazinyl-5-methyl-3-nitropyridine 2-Hydrazinyl-5-methyl-3-nitropyridine 21901-25-7 C6H8N4O2
5-Bromo-2-iodo-4-picoline 5-Bromo-2-iodo-4-picoline 941294-57-1 C6H5BrIN
Ethyl 6-methylimidazo[1,2-a]pyridine-2-carboxylate Ethyl 6-methylimidazo[1,2-a]pyridine-2-carboxylate 70705-30-5 C11H12N2O2
(6-Methylpyridin-2-yl)methyl acetate (6-Methylpyridin-2-yl)methyl acetate 13287-64-4 C9H11NO2
2,4-Dimethoxy-5-nitropyridine 2,4-Dimethoxy-5-nitropyridine 607373-84-2 C7H8N2O4
2-Amino-3-bromo-5-cyanopyridine 2-Amino-3-bromo-5-cyanopyridine 477871-32-2 C6H4BrN3
2-Bromo-6-methylpyridine-3-carboxaldehyde 2-Bromo-6-methylpyridine-3-carboxaldehyde 853179-74-5 C7H6BrNO
4-IODO-2-PYRIDONE 4-IODO-2-PYRIDONE 858839-90-4 C5H4INO
5-ETHYL-4,5,6,7-TETRAHYDRO-THIAZOLO[5,4-C]PYRIDIN-2-YLAMINE 5-ETHYL-4,5,6,7-TETRAHYDRO-THIAZOLO[5,4-C]PYRIDIN-2-YLAMINE 17899-49-9 C8H13N3S
3-(4-AMINO-3-PYRIDYL)ACRYLIC ACID 3-(4-AMINO-3-PYRIDYL)ACRYLIC ACID 773132-83-5 C8H8N2O2
6-Pyrrolidin-1-yl-nicotinic acid 6-Pyrrolidin-1-yl-nicotinic acid 210963-95-4 C10H12N2O2
tert-Butyl (6-Chloropyridin-2-yl)-carbamate tert-Butyl (6-Chloropyridin-2-yl)-carbamate 159603-71-1 C10H13ClN2O2
2-(4-Hydroxypenyl)pyridine 2-(4-Hydroxypenyl)pyridine 51035-40-6 C11H9NO
3-VINYL-5-BROMO-PYRIDINE 3-VINYL-5-BROMO-PYRIDINE 191104-26-4 C7H6BrN
4,4'-Dipyridyl hydrate 4,4'-Dipyridyl hydrate 123333-55-1 C10H10N2O
4-METHYLAMINOETHYLPYRIDINE 2HCL 4-METHYLAMINOETHYLPYRIDINE 2HCL 101252-40-8 C8H12N2.2ClH
5-bromo-6-chloropyridin-2-amine 5-bromo-6-chloropyridin-2-amine 358672-65-8 C5H4BrClN2
(S)-2-[4-(1,1-Dimethylethyl)-4,5-dihydro-2-oxazolyl]-6-methylpyridine (S)-2-[4-(1,1-Dimethylethyl)-4,5-dihydro-2-oxazolyl]-6-methylpyridine 199277-80-0 C13H18N2O
2-BROMOPYRIDINE-4-CARBOXALDEHYDE DIETHYL ACETAL 2-BROMOPYRIDINE-4-CARBOXALDEHYDE DIETHYL ACETAL C10H14BrNO2
4-AMINO-2,6-DIFLUOROPYRIDINE 4-AMINO-2,6-DIFLUOROPYRIDINE 63489-58-7 C5H4F2N2
posizolid posizolid 252260-02-9 C21H21F2N3O7
4-Pyridinamine,  3-methyl-5-nitro- 4-Pyridinamine, 3-methyl-5-nitro- 18227-67-3 C6H7N3O2
1H-Pyrrolo[2,3-b]pyridine, 4-chloro-1-[tris(1-methylethyl)silyl]- 1H-Pyrrolo[2,3-b]pyridine, 4-chloro-1-[tris(1-methylethyl)silyl]- 651744-48-8 C16H25ClN2Si
4,6-DIMETHYLNICOTINONITRILE 4,6-DIMETHYLNICOTINONITRILE 6623-21-8 C8H8N2
3-AMINOETHYLPYRIDINE HCL 3-AMINOETHYLPYRIDINE HCL 84359-16-0 C7H11ClN2
5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione 5-(4-(2-(5-Ethylpyridin-2-yl)ethoxy)benzylidene)thiazolidine-2,4-dione 136401-70-2 C19H18N2O3S
1-(5-Bromopyridin-2-yl)-1H-pyrazole 1-(5-Bromopyridin-2-yl)-1H-pyrazole 433922-57-7 C8H6BrN3
5-Bromo-N-cyclopentylpicolinamide 5-Bromo-N-cyclopentylpicolinamide 845305-91-1 C11H13BrN2O
5-Bromo-N-propylpicolinamide 5-Bromo-N-propylpicolinamide 845305-89-7 C9H11BrN2O
1H-Pyrrolo[3,2-b]pyridine,7-methoxy-(9CI) 1H-Pyrrolo[3,2-b]pyridine,7-methoxy-(9CI) 425380-39-8 C8H8N2O
2-Pyridinecarboxylicacid,4-amino-,ethylester(9CI) 2-Pyridinecarboxylicacid,4-amino-,ethylester(9CI) 773140-43-5 C8H10N2O2
3-Pyridinol,2,6-difluoro-(9CI) 3-Pyridinol,2,6-difluoro-(9CI) 209328-85-8 C5H3F2NO
3-Pyridinecarbonitrile,6-methoxy-2-methyl-(9CI) 3-Pyridinecarbonitrile,6-methoxy-2-methyl-(9CI) 105277-11-0 C8H8N2O
3-Pyridineacetonitrile,2-methyl-(6CI,9CI) 3-Pyridineacetonitrile,2-methyl-(6CI,9CI) 101166-73-8 C8H8N2
DIETHYL 4-ETHYL-1,4-DIHYDRO-2,6-DIMETHYL-3,5-PYRIDINEDICARBOXYLATE DIETHYL 4-ETHYL-1,4-DIHYDRO-2,6-DIMETHYL-3,5-PYRIDINEDICARBOXYLATE 1153-66-8 C15H23NO4
1-(3-CHLORO-PYRIDIN-4-YL)-ETHANONE 1-(3-CHLORO-PYRIDIN-4-YL)-ETHANONE 78790-82-6 C7H6ClNO
3,5-DIBROMO-4-CHLOROPYRIDINE 3,5-DIBROMO-4-CHLOROPYRIDINE 13626-17-0 C5H2Br2ClN
ETHYL 3-HYDROXYFURO[2,3-C]PYRIDINE-2-CARBOXYLATE ETHYL 3-HYDROXYFURO[2,3-C]PYRIDINE-2-CARBOXYLATE 106531-50-4 C10H9NO4
(R)-6-Cyclopentyl-6-[2-(2,6-diethylpyridin-4-yl)ethyl]-3-[(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methyl]-4-hydroxy-5,6-dihydro-2H-pyran-2-one (R)-6-Cyclopentyl-6-[2-(2,6-diethylpyridin-4-yl)ethyl]-3-[(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)methyl]-4-hydroxy-5,6-dihydro-2H-pyran-2-one 877130-28-4 C29H37N5O3
N-Methyl-N-[2-(4-nitrophenoxy)ethyl]-2-pyridinamine N-Methyl-N-[2-(4-nitrophenoxy)ethyl]-2-pyridinamine 329249-47-0 C14H15N3O3
2,4-Dichloro-5-fluoropyridine 2,4-Dichloro-5-fluoropyridine 189281-48-9 C5H2Cl2FN
2,5-dibromonicotinonitrile 2,5-dibromonicotinonitrile 1214340-41-6 C6H2Br2N2
(R)-3-(1-(2,6-dichloro-3-fluorophenyl)ethoxy)-2-nitropyridine (R)-3-(1-(2,6-dichloro-3-fluorophenyl)ethoxy)-2-nitropyridine 877397-70-1 C13H9Cl2FN2O3
2-(Chloromethyl)-3-fluoropyridine Hydrochloride 2-(Chloromethyl)-3-fluoropyridine Hydrochloride 149463-07-0 C6H6Cl2FN
2-NITROPYRIDINE 2-NITROPYRIDINE 1232169-16-2 C5H4N2O2
4-NITRO-3-PYRIDINECARBOXYLIC ACID 4-NITRO-3-PYRIDINECARBOXYLIC ACID 100367-58-6 C6H4N2O4
2-AMINO-6-PYRIDINE CARBOXALDEHYDE 2-AMINO-6-PYRIDINE CARBOXALDEHYDE 332884-35-2 C6H6N2O
3-(AMINOMETHYL)-6-(TRIFLUOROMETHYL)PYRIDINE 3-(AMINOMETHYL)-6-(TRIFLUOROMETHYL)PYRIDINE 388565-75-1 C12H13N3O2S
2,6-Dichloroisonicotinamide 2,6-Dichloroisonicotinamide 89281-13-0 C6H4Cl2N2O
3-BROMO-2-HYDRAZINO-5-NITROPYRIDINE 3-BROMO-2-HYDRAZINO-5-NITROPYRIDINE 15862-38-1 C5H5BrN4O2
1-(3-AMINO-2,6-DICHLOROPYRIDIN-4-YL)ETHANONE 1-(3-AMINO-2,6-DICHLOROPYRIDIN-4-YL)ETHANONE 912772-91-9 C7H6Cl2N2O
2-TERT-BUTYLISONICOTINONITRILE 2-TERT-BUTYLISONICOTINONITRILE 33538-09-9 C10H12N2
2-CHLOROPYRIDO[2,3-D]PYRIMIDIN-4(1H)-ONE HYDROCHLORIDE 2-CHLOROPYRIDO[2,3-D]PYRIMIDIN-4(1H)-ONE HYDROCHLORIDE 126728-21-0 C7H5Cl2N3O
3-AMINO-2-(2-FLUOROPHENOXY)PYRIDINE 3-AMINO-2-(2-FLUOROPHENOXY)PYRIDINE 175135-66-7 C11H9FN2O
6-CHLORO-1,3-DIHYDRO-2H-IMIDAZO[4,5-B]PYRIDIN-2-ONE 6-CHLORO-1,3-DIHYDRO-2H-IMIDAZO[4,5-B]PYRIDIN-2-ONE 304861-88-9 C6H4ClN3O
2,3-DIAMINO-5-BROMO-6-METHYLPYRIDINE 2,3-DIAMINO-5-BROMO-6-METHYLPYRIDINE 59352-90-8 C6H8BrN3
Inabenfide Inabenfide 82211-24-3 C19H15ClN2O2
2-BENZYLOXY-NICOTINIC ACID 2-BENZYLOXY-NICOTINIC ACID C13H11NO3
3-(2-AMINOETHYL)PYRIDINE DIHYDROBROMIDE& 3-(2-AMINOETHYL)PYRIDINE DIHYDROBROMIDE& 307496-23-7 C7H11BrN2
METHYL 4-CHLOROPYRIDIN-2-YLCARBAMATE 97 METHYL 4-CHLOROPYRIDIN-2-YLCARBAMATE 97 889676-38-4 C7H7ClN2O2
NEURODYE RH-795, PURE NEURODYE RH-795, PURE 336185-18-3 C28H42N3O4+
6-CHLORO-5-METHYLPYRIDIN-3-AMINE 6-CHLORO-5-METHYLPYRIDIN-3-AMINE C6H7ClN2
2,3-CYCLOHEPTENOPYRIDINE 2,3-CYCLOHEPTENOPYRIDINE 7197-96-8 C10H13N
2-PHENYL-NICOTINIC ACID METHYL ESTER 2-PHENYL-NICOTINIC ACID METHYL ESTER 188797-88-8 C13H11NO2
5-Chloro-3-Fluoropyridine 5-Chloro-3-Fluoropyridine C5H3ClFN
2,4,5-Trifluoropyridine 2,4,5-Trifluoropyridine 837365-04-5 C5H2F3N
3,4,5-Trichloro-6-hydroxypyridine-2-carboxylic acid 3,4,5-Trichloro-6-hydroxypyridine-2-carboxylic acid 73455-14-8 C6H2Cl3NO3
tert-Butyl 4-(2-ethoxy-2-oxoethyl)piperidine-1-carboxylate tert-Butyl 4-(2-ethoxy-2-oxoethyl)piperidine-1-carboxylate 1003-40-3 C14H25NO4
4-(2,3-DICHLORO-PHENYL)-2,6-DIMETHYL-1,4-DIHYDRO-PYRIDINE-3,5-DICARBOXYLIC ACID MONOMETHYL ESTER 4-(2,3-DICHLORO-PHENYL)-2,6-DIMETHYL-1,4-DIHYDRO-PYRIDINE-3,5-DICARBOXYLIC ACID MONOMETHYL ESTER 105580-45-8 C16H15Cl2NO4
3-Iodo-5-Hydroxypyridine 3-Iodo-5-Hydroxypyridine 213765-61-8 C5H4INO
2,4-DIIODOPYRIDINE 2,4-DIIODOPYRIDINE 83674-71-9 C5H3I2N
Furo[2,3-c]pyridin-3(2H)-one (9CI) Furo[2,3-c]pyridin-3(2H)-one (9CI) 106531-52-6 C7H5NO2
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