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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
2-BROMO-5-(METHYLSULFONYL)PYRIDINE 2-BROMO-5-(METHYLSULFONYL)PYRIDINE 343262-51-1 C6H6BrNO2S
2,6-Dichloro-5-fluoronicotinamide 2,6-Dichloro-5-fluoronicotinamide 113237-20-0 C6H3Cl2FN2O
3-TERT-BUTYLSULFANYL-PYRIDINE-2-CARBONITRILE 3-TERT-BUTYLSULFANYL-PYRIDINE-2-CARBONITRILE 178811-40-0 C10H12N2S
5-FLUORO-3-METHYL-PYRIDIN-2-YLAMINE 5-FLUORO-3-METHYL-PYRIDIN-2-YLAMINE 886365-56-6 C6H7FN2
2-FLUORO-3-(HYDROXYMETHYL)-4-IODOPYRIDINE 2-FLUORO-3-(HYDROXYMETHYL)-4-IODOPYRIDINE 171366-19-1 C6H5FINO
4-FLUORO-3-PICOLINE 4-FLUORO-3-PICOLINE 28489-28-3 C6H6FN
6-chloromethyl-2-methylpyridinium chloride 6-chloromethyl-2-methylpyridinium chloride 3099-30-7 C7H9Cl2N
Methyl 1,2-dihydro-2-oxopyridine-4-carboxylate Methyl 1,2-dihydro-2-oxopyridine-4-carboxylate 89937-77-9 C7H7NO3
3,5-Dimethoxypyridine 3,5-Dimethoxypyridine 18677-48-0 C7H9NO2
2-BROMO-3-CHLOROPYRIDINE-4-BORONIC ACID 2-BROMO-3-CHLOROPYRIDINE-4-BORONIC ACID 1003043-31-9 C5H4BBrClNO2
5-AMINO-3-BROMO-2-METHYLPYRIDINE 5-AMINO-3-BROMO-2-METHYLPYRIDINE 186593-43-1 C6H7BrN2
2-(Dimethylamino)pyridine-5-boronic acid hydrate 2-(Dimethylamino)pyridine-5-boronic acid hydrate 579525-46-5 C7H11BN2O2
2-Thiobenzyl nicotinic acid 2-Thiobenzyl nicotinic acid 112811-90-2 C13H11NO2S
3-Ethyl-2-pyridinaMine 3-Ethyl-2-pyridinaMine 42753-67-3 C7H10N2
5-BROMO-2-ISOPROPOXYPYRIDINE 5-BROMO-2-ISOPROPOXYPYRIDINE 870521-31-6 C8H10BrNO
5-Fluoro-2-iodopyridine 5-Fluoro-2-iodopyridine 159870-80-1 C5H3FIN
1-[5-(TRIFLUOROMETHYL)PYRID-2-YL]-1,4-DIAZEPANE 1-[5-(TRIFLUOROMETHYL)PYRID-2-YL]-1,4-DIAZEPANE 306934-70-3 C11H14F3N3
2-BROMO-3-IODO-4-PICOLINE 2-BROMO-3-IODO-4-PICOLINE 88494-42-2 C6H5BrIN
3-FLUORO-5-IODO-PYRIDINE 3-FLUORO-5-IODO-PYRIDINE 757950-13-3 C5H3FIN
3-CHLORO-5-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 3-CHLORO-5-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 865186-94-3 C11H15BClNO2
5-TERT-BUTOXYCARBONYLAMINO-PYRIDINE-3-CARBOXYLIC ACID 5-TERT-BUTOXYCARBONYLAMINO-PYRIDINE-3-CARBOXYLIC ACID 337904-92-4 C11H14N2O4
4-BROMO-3-METHOXYPYRIDINE 4-BROMO-3-METHOXYPYRIDINE 109911-38-8 C6H6BrNO
2,2'-Bipyridine-3,3'-dicarboxylic acid 2,2'-Bipyridine-3,3'-dicarboxylic acid 4433-01-6 C12H8N2O4
4,4'-Di-tert-butyl-2,2'-dipyridyl 4,4'-Di-tert-butyl-2,2'-dipyridyl 72914-19-3 C18H24N2
2-AMINO-3-NITRO-6-(4‘-FLUORBENZYLAMINO)-PYRIDINE SPECIALITY CHEMICALS 2-AMINO-3-NITRO-6-(4‘-FLUORBENZYLAMINO)-PYRIDINE SPECIALITY CHEMICALS 33400-49-6 C12H11FN4O2
4-Pyridylethylmercaptan 4-Pyridylethylmercaptan 2127-05-1 C7H9NS
2-BROMOMETHYL-3-HYDROXYPYRIDINE HYDROBROMIDE 2-BROMOMETHYL-3-HYDROXYPYRIDINE HYDROBROMIDE 87440-88-8 C6H7Br2NO
5-Chloro-2-fluoropyridine-3-carboxaldehyde 5-Chloro-2-fluoropyridine-3-carboxaldehyde 882679-90-5 C6H3ClFNO
3-(4-BROMOPHENYL)PYRIDINE 3-(4-BROMOPHENYL)PYRIDINE 129013-83-8 C11H8BrN
METHYL 4-(TRIFLUOROMETHYL)NICOTINATE METHYL 4-(TRIFLUOROMETHYL)NICOTINATE 175204-82-7 C8H6F3NO2
2-Chloro-6-phenylnicotinonitrile 2-Chloro-6-phenylnicotinonitrile 43083-14-3 C12H7ClN2
4-Pyridinesulphonic acid 4-Pyridinesulphonic acid 5402-20-0 C5H5NO3S
DL-2-AMINO-4-PENTENOIC ACID DL-2-AMINO-4-PENTENOIC ACID 7685-44-1 C5H9NO2
1-(5-CHLOROPYRIDIN-2-YL)METHANAMINE 1-(5-CHLOROPYRIDIN-2-YL)METHANAMINE 67938-76-5 C6H7ClN2
6-AMINO-5-BROMONICOTINIC ACID 6-AMINO-5-BROMONICOTINIC ACID 180340-69-6 C6H5BrN2O2
2-PYRIDINEMETHANAMINE, 4-FLUORO- 2-PYRIDINEMETHANAMINE, 4-FLUORO- 859166-87-3 C6H7FN2
2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-7-carbaldehyde 2,3-dihydro-[1,4]dioxino[2,3-b]pyridine-7-carbaldehyde 95849-26-6 C8H7NO3
2-amino-5-bromo-3-fluoropyridine 2-amino-5-bromo-3-fluoropyridine 748812-37-5 C5H4BrFN2
5-Bromo-3-chloropyridine-2-carboxylic acid 5-Bromo-3-chloropyridine-2-carboxylic acid 1189513-51-6 C6H3BrClNO2
3-Bromopyridine-4-methanol 3-Bromopyridine-4-methanol 146679-66-5 C6H6BrNO
3-Amino-2-hydroxy-5-trifluoromethylpyridine 3-Amino-2-hydroxy-5-trifluoromethylpyridine 90778-25-9 C6H5F3N2O
3,5-Dimethyl-2,6-dibromopyridine 3,5-Dimethyl-2,6-dibromopyridine 117846-58-9 C7H7Br2N
2,6-DIFLUORONICOTINALDEHYDE 2,6-DIFLUORONICOTINALDEHYDE 155601-65-3 C6H3F2NO
2,6-BIS(2-BENZIMIDAZOLYL)PYRIDINE 2,6-BIS(2-BENZIMIDAZOLYL)PYRIDINE 28020-73-7 C19H13N5
5-CHLORO-2-FLUORO-4-PICOLINE 5-CHLORO-2-FLUORO-4-PICOLINE 884494-88-6 C6H5ClFN
2,6-DIMETHYL-4-CYANOPYRIDINE 2,6-DIMETHYL-4-CYANOPYRIDINE 39965-81-6 C8H8N2
1-(2-ETHOXY-2-OXOETHYL)PYRIDINIUM BROMIDE 1-(2-ETHOXY-2-OXOETHYL)PYRIDINIUM BROMIDE 17282-40-5 C9H12BrNO2
6-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine 6-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine 914612-23-0 C14H14ClN3
2,6-DI-TERT-BUTYLPYRIDINE 2,6-DI-TERT-BUTYLPYRIDINE 585-48-8 C13H21N
2-(2-Bromoethyl)pyridine 2-(2-Bromoethyl)pyridine 39232-04-7 C7H8BrN
2-MERCAPTOPYRIDINE 2-MERCAPTOPYRIDINE 73018-10-7 C5H5NS
2,2-DIMETHYL-N-PYRIDIN-2-YL-PROPIONAMIDE 2,2-DIMETHYL-N-PYRIDIN-2-YL-PROPIONAMIDE 86847-59-8 C10H14N2O
(3-BROMO-PYRIDIN-4-YL)-CARBAMIC ACID TERT-BUTYL ESTER (3-BROMO-PYRIDIN-4-YL)-CARBAMIC ACID TERT-BUTYL ESTER 257937-08-9 C10H13BrN2O2
5-BROMO-2-(PYRROLIDIN-1-YL)PYRIDINE 5-BROMO-2-(PYRROLIDIN-1-YL)PYRIDINE 210963-93-2 C9H11BrN2
5-Fluoropyridine-2-boronic acid 5-Fluoropyridine-2-boronic acid 946002-10-4 C5H5BFNO2
3-Amino-6-chloropyridine-2-carboxylic acid 3-Amino-6-chloropyridine-2-carboxylic acid 866807-27-4 C6H5ClN2O2
Pyridine, 4-fluoro-3-nitro- (9CI) Pyridine, 4-fluoro-3-nitro- (9CI) 115812-96-9 C5H3FN2O2
BENZYL-PYRIDIN-2-YLMETHYL-AMINE BENZYL-PYRIDIN-2-YLMETHYL-AMINE 18081-89-5 C13H14N2
2,4-DICHLORO-3-CYANOPYRIDINE 2,4-DICHLORO-3-CYANOPYRIDINE 180995-12-4 C6H2Cl2N2
1-Methylthyl-2-oxo-1,2-dihydropyridine-4-carboxylic acid 1-Methylthyl-2-oxo-1,2-dihydropyridine-4-carboxylic acid 33972-97-3 C7H7NO3
2-HYDROXY-6-(TRIFLUOROMETHYL)NICOTINICACID
2-HYDROXY-6-(TRIFLUOROMETHYL)NICOTINICACID 191595-63-8 C7H4F3NO3
4-Trifluoromethyl-pyridine-2-carbonitrile 4-Trifluoromethyl-pyridine-2-carbonitrile 936841-69-9 C7H3F3N2
4-Methoxypyridine-3-carbonitrile 4-Methoxypyridine-3-carbonitrile 74133-20-3 C7H6N2O
5-AMINOPYRROLO[3,2-B]PYRIDINE
5-AMINOPYRROLO[3,2-B]PYRIDINE 207849-66-9 C7H7N3
7-CHLORO-2-IODOTHIENO[3,2-B]PYRIDINE 7-CHLORO-2-IODOTHIENO[3,2-B]PYRIDINE 602303-26-4 C7H3ClINS
2-Pyridinecarbonitrile,6-amino-(9CI) 2-Pyridinecarbonitrile,6-amino-(9CI) 370556-44-8 C6H5N3
Methyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinate Methyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinate 957065-99-5 C13H18BNO4
TERT-BUTYL [(5-(AMINOMETHYL)PYRIDIN-2-YL]CARBAMATE TERT-BUTYL [(5-(AMINOMETHYL)PYRIDIN-2-YL]CARBAMATE 187237-37-2 C11H17N3O2
2,3-DICHLORO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 2,3-DICHLORO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]-DIOXABOROLAN-2-YL)PYRIDINE 1073353-78-2 C11H14BCl2NO2
5-(bromomethyl)-2-(trifluoromethyl)pyridine 5-(bromomethyl)-2-(trifluoromethyl)pyridine 108274-33-5 C7H5BrF3N
5-BROMO-3-FLUOROPICOLINIC ACID 5-BROMO-3-FLUOROPICOLINIC ACID 669066-91-5 C6H3BrFNO2
ETHYL 2-BROMOISONICOTINATE ETHYL 2-BROMOISONICOTINATE 89978-52-9 C8H8BrNO2
2-FORMYL-4-PICOLINE 2-FORMYL-4-PICOLINE 53547-60-7 C7H7NO
4-Methoxy-3-pyridineboronic acid 4-Methoxy-3-pyridineboronic acid 355004-67-0 C6H8BNO3
2-(Bromomethyl)pyridine hydrobromide 2-(Bromomethyl)pyridine hydrobromide 31106-82-8 C6H7Br2N
4-METHYLNICOTINALDEHYDE 4-METHYLNICOTINALDEHYDE 51227-28-2 C7H7NO
2,4-DIHYDROXY-6-METHYLPYRIDINE-3-CARBOXYLIC ACID 2,4-DIHYDROXY-6-METHYLPYRIDINE-3-CARBOXYLIC ACID 846557-80-0 C7H7NO4
(3-BROMO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE (3-BROMO-BENZYL)-PYRIDIN-3-YLMETHYL-AMINE 436096-90-1 C13H13BrN2
2-CHLORO-3-METHYLPYRIDINE-5-BORONIC ACID PINACOL ESTER 2-CHLORO-3-METHYLPYRIDINE-5-BORONIC ACID PINACOL ESTER 1010101-07-1 C12H17BClNO2
4-HYDROXYTHIENO[3,2-C]PYRIDINE 4-HYDROXYTHIENO[3,2-C]PYRIDINE 27685-92-3 C7H5NOS
5-Nitropyridin-3-amine 5-Nitropyridin-3-amine 934-59-8 C5H5N3O2
N-ETHYL-N-(4-PICOLYL)ATROPAMIDE N-ETHYL-N-(4-PICOLYL)ATROPAMIDE 57322-50-6 C17H18N2O
3-(BENZYLOXY)-5-BROMOPYRIDINE 3-(BENZYLOXY)-5-BROMOPYRIDINE 130722-95-1 C12H10BrNO
2,6-Dichloropyridine-4-methylamine 2,6-Dichloropyridine-4-methylamine 88579-63-9 C6H6Cl2N2
4-BROMO-5-FLUORO-2-HYDROXY-3-NITROPYRIDINE 4-BROMO-5-FLUORO-2-HYDROXY-3-NITROPYRIDINE 884495-02-7 C5H2BrFN2O3
1-(6-METHYLPYRID-2-YL)PIPERAZINE 1-(6-METHYLPYRID-2-YL)PIPERAZINE 55745-89-6 C10H15N3
2,3,6-TRIMETHYLPYRIDINE 2,3,6-TRIMETHYLPYRIDINE 1462-84-6 C8H11N
2-BROMO-5-FLUOROPYRIDINE-4-BORONIC ACID 2-BROMO-5-FLUOROPYRIDINE-4-BORONIC ACID 1072951-43-9 C5H4BBrFNO2
1H-pyrrolo[2,3-b]pyridine-6-carbonitrile 1H-pyrrolo[2,3-b]pyridine-6-carbonitrile 189882-33-5 C8H5N3
4-CHLOROPICOLINALDEHYDE 4-CHLOROPICOLINALDEHYDE 63071-13-6 C6H4ClNO
3-Bromo-2-iodopyridine 3-Bromo-2-iodopyridine 408502-43-2 C5H3BrIN
2-BROMO-5-IODO-3-METHYLPYRIDINE 2-BROMO-5-IODO-3-METHYLPYRIDINE 65550-78-9 C6H5BrIN
(3-FLUOROPYRID-2-YL)METHANOL (3-FLUOROPYRID-2-YL)METHANOL 31181-79-0 C6H6FNO
3-CYANO-5-FLUOROPYRIDINE 3-CYANO-5-FLUOROPYRIDINE 696-42-4 C6H3FN2
3,4-Dihydro-2H-pyrido[3,2-b][1,4]oxazine 3,4-Dihydro-2H-pyrido[3,2-b][1,4]oxazine 20348-23-6 C7H8N2O
3,5-Dibromo-2-fluoro-4-methylpyridine 3,5-Dibromo-2-fluoro-4-methylpyridine 1000340-01-1 C6H4Br2FN
5-Bromo-2-chloroisonicotinic acid 5-Bromo-2-chloroisonicotinic acid 886365-31-7 C6H3BrClNO2
3-Chloropyridine-2-carboxaldehyde 3-Chloropyridine-2-carboxaldehyde 206181-90-0 C6H4ClNO
3-Methylpyridine-4-boronic acid 3-Methylpyridine-4-boronic acid 894808-72-1 C6H8BNO2
3-(2-Chloroethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one hydrochloride 3-(2-Chloroethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one hydrochloride 93076-03-0 C11H16Cl2N2O
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