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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-(4-Methylimidazol-1-yl)pyridine-5-boronic acid 2-(4-Methylimidazol-1-yl)pyridine-5-boronic acid 2225180-12-9 C9H10BN3O2
2,4-Dibromo-5-(3-furyl)pyridine 2,4-Dibromo-5-(3-furyl)pyridine 1381936-73-7 C9H5Br2NO
2,4-Dibromo-5-iodopyridine 2,4-Dibromo-5-iodopyridine 1563530-52-8 C5H2Br2IN
2,4-Dibromo-6-(tert-butyl)pyridine 2,4-Dibromo-6-(tert-butyl)pyridine 1353856-97-9 C9H11Br2N
2,5-Dibromo-4-(3-pyridyl)pyridine 2,5-Dibromo-4-(3-pyridyl)pyridine 1381933-55-6 C10H6Br2N2
2,5-Dibromo-4-(4-fluorophenyl)pyridine 2,5-Dibromo-4-(4-fluorophenyl)pyridine 1381933-56-7 C11H6Br2FN
2,5-Dibromo-4-(iso-propyl)pyridine 2,5-Dibromo-4-(iso-propyl)pyridine 1256833-52-9 C8H9Br2N
2-Amino-3-bromo-5-(cyclobutyl)pyridine 2-Amino-3-bromo-5-(cyclobutyl)pyridine 1381938-52-8 C9H11BrN2
2-Amino-5-bromo-4-(3-methyl-1H-pyrazol-1-yl)pyridine 2-Amino-5-bromo-4-(3-methyl-1H-pyrazol-1-yl)pyridine 1381937-07-0 C9H9BrN4
2-Amino-5-chloropyridine-4-boronic acid pinacol ester 2-Amino-5-chloropyridine-4-boronic acid pinacol ester 1222522-38-4 C11H16BClN2O2
2-AMINO-6-TRIFLUOROMETHYLPYRIDINE-4-BORONIC ACID PINACOL ESTER 2-AMINO-6-TRIFLUOROMETHYLPYRIDINE-4-BORONIC ACID PINACOL ESTER 1558927-41-5 C12H16BF3N2O2
2-Bromo-3-(pyridin-4-yl)pyridine 2-Bromo-3-(pyridin-4-yl)pyridine 1417518-53-6 C10H7BrN2
2-Bromo-3-methoxycarbonyl-4-cyclopentylpyridine 2-Bromo-3-methoxycarbonyl-4-cyclopentylpyridine 1622844-18-1 C12H14BrNO2
2-Bromo-4-chloro-5-(2-trifluoromethylphenyl)pyridine 2-Bromo-4-chloro-5-(2-trifluoromethylphenyl)pyridine 1381943-31-2 C12H6BrClF3N
2-Fluoro-6-(iso-propyl)pyridine 2-Fluoro-6-(iso-propyl)pyridine 1563530-41-5 C8H10FN
2-Fluoro-6-(thiazol-2-yl)pyridine 2-Fluoro-6-(thiazol-2-yl)pyridine 1563530-00-6 C8H5FN2S
2-Methoxy-6-(oxan-4-yl)pyridine-4-boronic acid pinacol ester 2-Methoxy-6-(oxan-4-yl)pyridine-4-boronic acid pinacol ester 2223033-94-9 C17H26BNO4
2-Methyl-6-trifluoromethylpyridine-3-boronic acid pinacol ester 2-Methyl-6-trifluoromethylpyridine-3-boronic acid pinacol ester 2223041-89-0 C13H17BF3NO2
3-Amino-6-(iso-propyl)pyridine-4-boronic acid pinacol ester 3-Amino-6-(iso-propyl)pyridine-4-boronic acid pinacol ester 2223052-51-3 C14H23BN2O2
3-Bromo-4-(iso-propyl)-2-chloropyridine 3-Bromo-4-(iso-propyl)-2-chloropyridine 1622842-64-1 C8H9BrClN
4-Fluoro-2-(ethoxy)pyridine-5-boronic acid pinacol ester 4-Fluoro-2-(ethoxy)pyridine-5-boronic acid pinacol ester 2223049-09-8 C13H19BFNO3
4-Fluoro-2-(morpholino)pyridine-5-boronic acid pinacol ester 4-Fluoro-2-(morpholino)pyridine-5-boronic acid pinacol ester 2223052-20-6 C15H22BFN2O3
5-(1H-Pyrrol-1-yl)pyridine-3-boronic acid pinacol ester 5-(1H-Pyrrol-1-yl)pyridine-3-boronic acid pinacol ester 2223051-21-4 C15H19BN2O2
5-(4-Aminophenyl)pyridine-3-boronic acid pinacol ester 5-(4-Aminophenyl)pyridine-3-boronic acid pinacol ester 1402172-45-5 C17H21BN2O2
5-Bromo-3-(iso-propyl)-2-(trifluoromethyl)pyridine 5-Bromo-3-(iso-propyl)-2-(trifluoromethyl)pyridine 1622842-89-0 C9H9BrF3N
5-Fluoro-2-(thiazol-2-yl)pyridine-4-boronic acid pinacol ester 5-Fluoro-2-(thiazol-2-yl)pyridine-4-boronic acid pinacol ester 2223049-18-9 C14H16BFN2O2S
5-Methoxy-2-trifluoromethylpyridine-4-boronic acid pinacol ester 5-Methoxy-2-trifluoromethylpyridine-4-boronic acid pinacol ester 2223041-06-1 C13H17BF3NO3
5-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 5-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trifluoromethyl)pyridine 2170501-97-8 C13H17BF3NO2
1-(5-Bromo-3-pyridyl)-4-bromopyrazole 1-(5-Bromo-3-pyridyl)-4-bromopyrazole 1353856-39-9 C8H5Br2N3
2,3-Dibromo-4-(4-methoxyphenyl)pyridine 2,3-Dibromo-4-(4-methoxyphenyl)pyridine 1381938-05-1 C12H9Br2NO
2,4-Dibromo-3-(2-thienyl)pyridine 2,4-Dibromo-3-(2-thienyl)pyridine 1381942-89-7 C9H5Br2NS
2-AMINO-3-(2-METHYLPIPERIDIN-1-YL)PYRIDINE 2-AMINO-3-(2-METHYLPIPERIDIN-1-YL)PYRIDINE 1563529-68-9 C11H17N3
2-Amino-3-bromo-4-(4-pyridyl)pyridine 2-Amino-3-bromo-4-(4-pyridyl)pyridine 1381938-39-1 C10H8BrN3
2-Amino-4-bromo-3-(3-tolyl)pyridine 2-Amino-4-bromo-3-(3-tolyl)pyridine 1381934-88-8 C12H11BrN2
2-Amino-5-(2-pyridyl)pyrimidine 2-Amino-5-(2-pyridyl)pyrimidine 197958-23-9 C9H8N4
2-Amino-6-(pyrazol-4-yl)pyridine 2-Amino-6-(pyrazol-4-yl)pyridine 1563530-43-7 C8H8N4
2-Bromo-4-(2-methyl-4-fluorophenyl)pyridine 2-Bromo-4-(2-methyl-4-fluorophenyl)pyridine 1215074-28-4 C12H9BrFN
2-Bromo-4-(3-hydroxypyrrolidino)pyridine 2-Bromo-4-(3-hydroxypyrrolidino)pyridine 1563530-58-4 C9H11BrN2O
2-Bromo-4-(4-methylimidazol-1-yl)pyridine 2-Bromo-4-(4-methylimidazol-1-yl)pyridine 1142194-71-5 C9H8BrN3
2-Bromo-4-(4-tolyl)pyridine 2-Bromo-4-(4-tolyl)pyridine 111971-30-3 C12H10BrN
2-Bromo-4-(piperidino)pyridine 2-Bromo-4-(piperidino)pyridine 24255-92-3 C10H13BrN2
2-Bromo-5-(2-fluorophenyl)pyridine 2-Bromo-5-(2-fluorophenyl)pyridine 1142197-38-3 C11H7BrFN
2-Bromo-5-(3,5-difluorophenyl)pyridine 2-Bromo-5-(3,5-difluorophenyl)pyridine 1225550-10-6 C11H6BrF2N
2-Bromo-5-(N-Boc-piperidin-4-yl)pyridine 2-Bromo-5-(N-Boc-piperidin-4-yl)pyridine 1206247-72-4 C15H21BrN2O2
2-Bromo-5-(n-propyl)pyridine 2-Bromo-5-(n-propyl)pyridine 1159821-61-0 C8H10BrN
2-Bromo-5-amino-4-(n-propyl)pyridine 2-Bromo-5-amino-4-(n-propyl)pyridine 1381933-12-5 C8H11BrN2
2-Bromo-6-(4-fluoro-2-methylphenyl)pyridine 2-Bromo-6-(4-fluoro-2-methylphenyl)pyridine 209412-17-9 C12H9BrFN
2-CHLORO-4-AMINO-3-PHENYLPYRIDINE 2-CHLORO-4-AMINO-3-PHENYLPYRIDINE 1381936-86-2 C11H9ClN2
2-Chloro-4-amino-5-phenylpyridine 2-Chloro-4-amino-5-phenylpyridine 1381934-65-1 C11H9ClN2
2-Ethyl-6-hydroxypyridine 2-Ethyl-6-hydroxypyridine 61892-99-7 C7H9NO
2-fluoro-6-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)pyridine 2-fluoro-6-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl)pyridine 2256755-47-0 C14H17BFN3O2
2-Hydroxy-5-(thiazol-4-yl)pyridine 2-Hydroxy-5-(thiazol-4-yl)pyridine 1159820-10-6 C8H6N2OS
2-Hydroxy-6-(3-fluorophenyl)pyridine 2-Hydroxy-6-(3-fluorophenyl)pyridine 1111114-86-3 C11H8FNO
2-Hydroxy-6-(cyclopropyl)pyridine 2-Hydroxy-6-(cyclopropyl)pyridine 846551-99-3 C8H9NO
2-Cyclobutoxypyridin-3-amine 2-Cyclobutoxypyridin-3-amine 1247347-64-3 C9H12N2O
3-Bromo-4-chloro-2-(trifluoromethyl)pyridine 3-Bromo-4-chloro-2-(trifluoromethyl)pyridine 1211536-37-6 C6H2BrClF3N
2-chloro-3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-chloro-3-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1416367-16-2 C11H14BClFNO2
3-Bromo-5-(3-fluorophenyl)-pyridine 3-Bromo-5-(3-fluorophenyl)-pyridine 1276123-21-7 C11H7BrFN
3-(difluoromethyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 3-(difluoromethyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1220696-58-1 C12H16BF2NO2
5-Amino-2-(2-pyridyl)pyrimidine 5-Amino-2-(2-pyridyl)pyrimidine 1094246-40-8 C9H8N4
3-bromo-5-(4-methyl-1H-imidazol-1-yl)pyridine 3-bromo-5-(4-methyl-1H-imidazol-1-yl)pyridine 1289078-51-8 C9H8BrN3
2-FLUORO-6-METHYLPYRIDIN-4-AMINE 2-FLUORO-6-METHYLPYRIDIN-4-AMINE 1622844-16-9 C6H7FN2
2-(furan-2-yl)pyridin-3-amine 2-(furan-2-yl)pyridin-3-amine 886508-57-2 C9H8N2O
2-(thiophen-2-yl)pyridin-3-amine 2-(thiophen-2-yl)pyridin-3-amine 886507-53-5 C9H8N2S
2-(cyclohexyloxy)pyridin-4-amine 2-(cyclohexyloxy)pyridin-4-amine 1248075-07-1 C11H16N2O
1-(4-Bromo-6-chloropyridin-2-yl)ethanone 1-(4-Bromo-6-chloropyridin-2-yl)ethanone 1060815-65-7 C7H5BrClNO
4,5-Dibromo-1H-pyridin-2-one 4,5-Dibromo-1H-pyridin-2-one 1381937-65-0 C5H3Br2NO
2-(4-PYRIDYL)-4-HYDROXY-6-MENTHYL PYRIMIDINE 2-(4-PYRIDYL)-4-HYDROXY-6-MENTHYL PYRIMIDINE 59341-68-3 C10H9N3O
3-(2-AMINOPYRIDIN-5-YL)BENZONITRILE 3-(2-AMINOPYRIDIN-5-YL)BENZONITRILE 579475-51-7 C12H9N3
3-(ISO-BUTYL)PYRIDIN-4-AMINE 3-(ISO-BUTYL)PYRIDIN-4-AMINE 1486237-77-7 C9H14N2
3,4-Dibromo-2-(2-furyl)pyridine 3,4-Dibromo-2-(2-furyl)pyridine 1381941-99-6 C9H5Br2NO
3,4-Dibromo-2-cyanopyridine 3,4-Dibromo-2-cyanopyridine 1381934-40-2 C6H2Br2N2
3,4-Dibromo-6-(2-tolyl)pyridine 3,4-Dibromo-6-(2-tolyl)pyridine 1381942-18-2 C12H9Br2N
3,4-Dibromo-6-(morpholino)pyridine 3,4-Dibromo-6-(morpholino)pyridine 1381943-92-5 C9H10Br2N2O
3-AMINO-4-(3-TRIFLUOROMETHYLPHENYL)PYRIDINE 3-AMINO-4-(3-TRIFLUOROMETHYLPHENYL)PYRIDINE 1374664-88-6 C12H9F3N2
3-Amino-4,3'-bipyridine 3-Amino-4,3'-bipyridine 1368332-70-0 C10H9N3
3-Amino-5-bromo-6-(3-pyridyl)pyridine 3-Amino-5-bromo-6-(3-pyridyl)pyridine 1399480-84-2 C10H8BrN3
3-AMINO-6-(THIAZOL-4-YL)PYRIDINE 3-AMINO-6-(THIAZOL-4-YL)PYRIDINE 1159822-03-3 C8H7N3S
3-Bromo-2-(1H-pyrazol-1-yl)pyridine 3-Bromo-2-(1H-pyrazol-1-yl)pyridine 1249663-59-9 C8H6BrN3
3-Bromo-2-(2-methylimidazol-1-yl)pyridine 3-Bromo-2-(2-methylimidazol-1-yl)pyridine 1247410-44-1 C9H8BrN3
3-Bromo-2-(4-methylimidazol-1-yl)pyridine 3-Bromo-2-(4-methylimidazol-1-yl)pyridine 1288997-99-8 C9H8BrN3
3-Bromo-2-(cyclobutyl)pyridine 3-Bromo-2-(cyclobutyl)pyridine 1417518-98-9 C9H10BrN
3-Bromo-2-(sec-butyl)pyridine 3-Bromo-2-(sec-butyl)pyridine 1563533-43-6 C9H12BrN
3-Bromo-4-(tert-butyl)pyridine 3-Bromo-4-(tert-butyl)pyridine 90731-98-9 C9H12BrN
3-Bromo-5-(3, 5-difluorophenyl)pyridine 3-Bromo-5-(3, 5-difluorophenyl)pyridine 1276123-24-0 C11H6BrF2N
3-Bromo-6-(3-methoxyphenyl)pyridine 3-Bromo-6-(3-methoxyphenyl)pyridine 1119089-23-4 C12H10BrNO
3-Hydroxy-2-(2-fluorophenyl)pyridine 3-Hydroxy-2-(2-fluorophenyl)pyridine 1214329-15-3 C11H8FNO
3-Hydroxy-2-(2-trifluoromethylphenyl)pyridine 3-Hydroxy-2-(2-trifluoromethylphenyl)pyridine 1261466-20-9 C12H8F3NO
3-Hydroxy-5-(3, 4-difluorophenyl)pyridine 3-Hydroxy-5-(3, 4-difluorophenyl)pyridine 1261901-49-8 C11H7F2NO
3-Hydroxy-5-(4-fluorophenyl)pyridine 3-Hydroxy-5-(4-fluorophenyl)pyridine 364763-21-3 C11H8FNO
3-Hydroxy-5-(n-propyl)pyridine 3-Hydroxy-5-(n-propyl)pyridine 61893-04-7 C8H11NO
4-(2-METHOXYPHENYL)PYRIDIN-2-AMINE 4-(2-METHOXYPHENYL)PYRIDIN-2-AMINE 1224740-89-9 C12H12N2O
4-AMINO-2-(CYCLOBUTOXY)PYRIDINE 4-AMINO-2-(CYCLOBUTOXY)PYRIDINE 1249765-43-2 C9H12N2O
4-Amino-3,5-dibromo-2-(3-methyl-1H-pyrazol-1-yl)pyridine 4-Amino-3,5-dibromo-2-(3-methyl-1H-pyrazol-1-yl)pyridine 1563532-37-5 C9H8Br2N4
4-Bromo-2-(4-tolyl)pyridine 4-Bromo-2-(4-tolyl)pyridine 916824-56-1 C12H10BrN
4-Chloro-6-(3-pyridyl)-2-cyclopropylpyrimidine 4-Chloro-6-(3-pyridyl)-2-cyclopropylpyrimidine 1159814-85-3 C12H10ClN3
4-Hydroxy-2-(iso-propyl)pyridine 4-Hydroxy-2-(iso-propyl)pyridine 1159815-61-8 C8H11NO
5-(iso-propyl)-3-acetoxypyridine 5-(iso-propyl)-3-acetoxypyridine 1434127-48-6 C10H13NO2
5-CHLORO-2,4'-BIPYRIDINE 5-CHLORO-2,4'-BIPYRIDINE 362045-48-5 C10H7ClN2
6-(oxetan-3-yl)pyridin-3-amine 6-(oxetan-3-yl)pyridin-3-amine 2222937-36-0 C8H10N2O
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