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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-Pyridinol, 2-bromo-6-(difluoromethyl)- 3-Pyridinol, 2-bromo-6-(difluoromethyl)- 1804707-23-0 C6H4BrF2NO
4,6-Difluoro-pyridin-2-ol 4,6-Difluoro-pyridin-2-ol 1227572-75-9 C5H3F2NO
Pyridine, 5-bromo-3-methoxy-2-(1-methylethyl)- Pyridine, 5-bromo-3-methoxy-2-(1-methylethyl)- 1256823-02-5 C9H12BrNO
1(2H)-Pyridinecarboxylic acid, 5,6-dihydro-2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, 1,1-dimethylethyl ester 1(2H)-Pyridinecarboxylic acid, 5,6-dihydro-2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, 1,1-dimethylethyl ester 2304631-43-2 C17H30BNO4
3,4-DIIODOPYRIDINE 3,4-DIIODOPYRIDINE 83674-72-0 C5H3I2N
Pyridine, 2-fluoro-6-(1H-pyrazol-1-yl)- Pyridine, 2-fluoro-6-(1H-pyrazol-1-yl)- 935252-70-3 C8H6FN3
3-(5-Chlorobiphenyl)-2-phenylpyridine 3-(5-Chlorobiphenyl)-2-phenylpyridine 2410989-70-5 C23H16ClN
6-propylpyridin-2-amine 6-propylpyridin-2-amine 41995-29-3 C8H12N2
2-Bromo-4-ethoxypyridine 2-Bromo-4-ethoxypyridine 17117-13-4 C7H8BrNO
Pyridine, 5-bromo-2-methoxy-3-(1-methylethyl)- Pyridine, 5-bromo-2-methoxy-3-(1-methylethyl)- 1256811-07-0 C9H12BrNO
Ethanone,1-(6-fluoro-2-pyridinyl)- Ethanone,1-(6-fluoro-2-pyridinyl)- 501009-05-8 C7H6FNO
6-(1-METHYLETHYL)-2-PYRIDINAMINE 6-(1-METHYLETHYL)-2-PYRIDINAMINE 78177-12-5 C8H12N2
3-BROMO-5-(3-METHYLTHIOPHEN-2-YL)PYRIDINE 3-BROMO-5-(3-METHYLTHIOPHEN-2-YL)PYRIDINE 286007-27-0 C9H6BrNS
Pyridine, 4-ethyl-2-fluoro- (9CI) Pyridine, 4-ethyl-2-fluoro- (9CI) 111887-68-4 C7H8FN
Pyridine, 2-(3-azetidinyloxy)-6-bromo- Pyridine, 2-(3-azetidinyloxy)-6-bromo- 1219980-57-0 C8H9BrN2O
Pyridine, 4-bromo-2-(methoxymethyl)-6-methyl- Pyridine, 4-bromo-2-(methoxymethyl)-6-methyl- 2410704-38-8 C8H10BrNO
Pyridine, 4-bromo-2-cyclopropyl-6-methyl- Pyridine, 4-bromo-2-cyclopropyl-6-methyl- 579475-93-7 C9H10BrN
3-bromo-6-isopropylpicolinonitrile 3-bromo-6-isopropylpicolinonitrile 2585650-55-9 C9H9BrN2
2-bromo-5-(2-chlorophenyl)pyridine 2-bromo-5-(2-chlorophenyl)pyridine 1226387-78-5 C11H7BrClN
3-BROMO-4-(4'-CHLOROPHENYL)PYRIDINE 3-BROMO-4-(4'-CHLOROPHENYL)PYRIDINE 335642-99-4 C11H7BrClN
5-CYCLOHEXYLPYRIDIN-2-AMINE 5-CYCLOHEXYLPYRIDIN-2-AMINE 190909-52-5 C11H16N2
5-Bromo-4-(cyclohexyl)pyridine-2-boronic acid pinacol ester 5-Bromo-4-(cyclohexyl)pyridine-2-boronic acid pinacol ester 2223012-41-5 C17H25BBrNO2
5-Bromo-6-(cyclohexyloxy)pyridine-3-boronic acid pinacol ester 5-Bromo-6-(cyclohexyloxy)pyridine-3-boronic acid pinacol ester 2223030-17-7 C17H25BBrNO3
5-Bromo-6-methoxypyridine-3-boronic acid pinacol ester 5-Bromo-6-methoxypyridine-3-boronic acid pinacol ester 2223040-05-7 C12H17BBrNO3
5-Fluoro-2-(3-methylpiperidin-1-yl)pyridine-4-boronic acid pinacol ester 5-Fluoro-2-(3-methylpiperidin-1-yl)pyridine-4-boronic acid pinacol ester 2222997-16-0 C17H26BFN2O2
6-Methyl-5-(iso-butyl)pyridine-3-boronic acid pinacol ester 6-Methyl-5-(iso-butyl)pyridine-3-boronic acid pinacol ester 2223051-70-3 C16H26BNO2
6-METHYL-5-(TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE-2-CARBONITRILE 6-METHYL-5-(TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRIDINE-2-CARBONITRILE 2009346-11-4 C13H17BN2O2
2-(tetrahydro-2H-pyran-2-yl)pyridin-4-amine 2-(tetrahydro-2H-pyran-2-yl)pyridin-4-amine 1622835-04-4 C10H14N2O
2,3-Dibromo-4-(1H-pyrazol-1-yl)pyridine 2,3-Dibromo-4-(1H-pyrazol-1-yl)pyridine 1381933-67-0 C8H5Br2N3
2,4-Dibromo-3-(2-furyl)pyridine 2,4-Dibromo-3-(2-furyl)pyridine 1381943-30-1 C9H5Br2NO
2-Amino-3,5-dibromo-4-(3-chlorophenyl)pyridine 2-Amino-3,5-dibromo-4-(3-chlorophenyl)pyridine 1563531-48-5 C11H7Br2ClN2
2-Amino-3-bromo-4-(4-methylpiperidin-1-yl)pyridine 2-Amino-3-bromo-4-(4-methylpiperidin-1-yl)pyridine 1381942-80-8 C11H16BrN3
2-Amino-4-(4-aminophenyl)pyridine 2-Amino-4-(4-aminophenyl)pyridine 1504915-57-4 C11H11N3
2-Amino-4-chloro-3-(5-pyrimidyl)pyridine 2-Amino-4-chloro-3-(5-pyrimidyl)pyridine 1381944-09-7 C9H7ClN4
2-AMINO-5-(2-(TRIFLUOROMETHYL)PHENYL)PYRIDINE 2-AMINO-5-(2-(TRIFLUOROMETHYL)PHENYL)PYRIDINE 875166-90-8 C12H9F3N2
2-Bromo-3-(methylethylamino)pyridine 2-Bromo-3-(methylethylamino)pyridine 1563531-99-6 C8H11BrN2
2-Bromo-5-(2-trifluoromethylphenyl)pyridine 2-Bromo-5-(2-trifluoromethylphenyl)pyridine 1159819-95-0 C12H7BrF3N
2-Bromo-5-(4-methyl-1H-pyrazol-1-yl)pyridine 2-Bromo-5-(4-methyl-1H-pyrazol-1-yl)pyridine 1314356-65-4 C9H8BrN3
2-Bromo-5-(N-Boc-Piperidin-3-yl)pyridine 2-Bromo-5-(N-Boc-Piperidin-3-yl)pyridine 1563534-05-3 C15H21BrN2O2
2-Bromo-5-(N-methylpyrazol-4-yl)pyridine 2-Bromo-5-(N-methylpyrazol-4-yl)pyridine 1159819-43-8 C9H8BrN3
2-Chloro-4-amino-5-(cyclopropyl)pyridine 2-Chloro-4-amino-5-(cyclopropyl)pyridine 1381944-12-2 C8H9ClN2
2-fluoro-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazol-1-yl)pyridine 2-fluoro-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazol-1-yl)pyridine 2256758-01-5 C13H16BFN4O2
2-Hydroxy-5-(4-fluorophenyl)pyridine 2-Hydroxy-5-(4-fluorophenyl)pyridine 163563-23-3 C11H8FNO
2-PROPYLPYRIDIN-4-AMINE 2-PROPYLPYRIDIN-4-AMINE 1159814-18-2 C8H12N2
3-AMINO-2-(4-FLUORO-2-METHYLPHENYL)PYRIDINE 3-AMINO-2-(4-FLUORO-2-METHYLPHENYL)PYRIDINE 1417518-47-8 C12H11FN2
3-AMINO-4-(4-METHYL-1H-PYRAZOL-1-YL)PYRIDINE 3-AMINO-4-(4-METHYL-1H-PYRAZOL-1-YL)PYRIDINE 1184589-66-9 C9H10N4
3-AMINO-6-(3,4-DIFLUOROPHENYL)PYRIDINE 3-AMINO-6-(3,4-DIFLUOROPHENYL)PYRIDINE 1225914-71-5 C11H8F2N2
3-methyl-6-(trifluoromethyl)pyridin-2-amine 3-methyl-6-(trifluoromethyl)pyridin-2-amine 1211582-57-8 C7H7F3N2
Pyridine, 4-bromo-3-iodo-2-methyl- Pyridine, 4-bromo-3-iodo-2-methyl- 1227593-48-7 C6H5BrIN
4-(6-BROMOPYRID-2-YL)MORPHOLINE 4-(6-BROMOPYRID-2-YL)MORPHOLINE 332134-60-8 C9H11BrN2O
Pyridine, 2-bicyclo[1.1.1]pent-1-yl-4-bromo- Pyridine, 2-bicyclo[1.1.1]pent-1-yl-4-bromo- 2697157-05-2 C10H10BrN
3-Pyridinecarbonitrile, 2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 3-Pyridinecarbonitrile, 2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- 2304818-06-0 C12H14BFN2O2
3-HYDROXY-4-PHENYLPYRIDINE 3-HYDROXY-4-PHENYLPYRIDINE 101925-26-2 C11H9NO
4-Pyridinamine,2,5-dimethyl-(9CI) 4-Pyridinamine,2,5-dimethyl-(9CI) 22279-89-6 C7H10N2
2-(4-Tolyl)pyridine-5-boronic acid pinacol ester 2-(4-Tolyl)pyridine-5-boronic acid pinacol ester 2223028-74-6 C18H22BNO2
2-(Cyclopentyl)-6-(N-Boc-piperidin-3-yl)pyridine-4-boronic acid pinacol ester 2-(Cyclopentyl)-6-(N-Boc-piperidin-3-yl)pyridine-4-boronic acid pinacol ester 2223006-74-2 C26H41BN2O4
2,3-DI(PYRIDIN-4-YL)PYRIDINE 2,3-DI(PYRIDIN-4-YL)PYRIDINE 1214365-95-3 C15H11N3
2,4-Dibromo-5-(3-fluorophenyl)pyridine 2,4-Dibromo-5-(3-fluorophenyl)pyridine 1381935-54-1 C11H6Br2FN
2,5-Dibromo-4-(2-chlorophenyl)pyridine 2,5-Dibromo-4-(2-chlorophenyl)pyridine 1381942-33-1 C11H6Br2ClN
2,5-Dibromo-4-(3-methylpiperidin-1-yl)pyridine 2,5-Dibromo-4-(3-methylpiperidin-1-yl)pyridine 1381936-82-8 C11H14Br2N2
2,5-Dibromo-4-(4-chlorophenyl)pyridine 2,5-Dibromo-4-(4-chlorophenyl)pyridine 1381942-35-3 C11H6Br2ClN
2,5-Dibromo-4-(pyrrolidino)pyridine 2,5-Dibromo-4-(pyrrolidino)pyridine 1381936-70-4 C9H10Br2N2
2,6-BIS(TERT-BUTYL)PYRIDINE-4-BORONIC ACID 2,6-BIS(TERT-BUTYL)PYRIDINE-4-BORONIC ACID 2225177-77-3 C13H22BNO2
2-Amino-4-bromo-5-(2-tolyl)pyridine 2-Amino-4-bromo-5-(2-tolyl)pyridine 1381937-09-2 C12H11BrN2
2-Amino-4-chloro-5-(cyclopropyl)pyridine 2-Amino-4-chloro-5-(cyclopropyl)pyridine 1381935-05-2 C8H9ClN2
2-Amino-5-(iso-propyl)-6-bromopyridine 2-Amino-5-(iso-propyl)-6-bromopyridine 1563532-15-9 C8H11BrN2
2-Amino-5-bromopyridine-4-boronic acid pinacol ester 2-Amino-5-bromopyridine-4-boronic acid pinacol ester 2223027-23-2 C11H16BBrN2O2
2-Amino-6-methyl-4-fluoropyridine 2-Amino-6-methyl-4-fluoropyridine 1227595-84-7 C6H7FN2
2-Bromo-3-(pyridin-3-yl)pyridine 2-Bromo-3-(pyridin-3-yl)pyridine 101002-03-3 C10H7BrN2
2-Bromo-3-fluoro-4-phenylpyridine 2-Bromo-3-fluoro-4-phenylpyridine 1622843-52-0 C11H7BrFN
2-Bromo-5-fluorolpyridine-4-boronic acid pinacol ester 2-Bromo-5-fluorolpyridine-4-boronic acid pinacol ester 2223033-31-4 C11H14BBrFNO2
2-Bromo-6-(acetoxy)pyridine 2-Bromo-6-(acetoxy)pyridine 1264036-20-5 C7H6BrNO2
2-BROMO-6-CHLORO-4-IODOPYRIDINE 2-BROMO-6-CHLORO-4-IODOPYRIDINE 1266119-21-4 C5H2BrClIN
2-Fluoro-6-(2-cyanophenyl)pyridine 2-Fluoro-6-(2-cyanophenyl)pyridine 1563529-75-8 C12H7FN2
2-HYDROXY-3-(4-FLUOROPHENYL)PYRIDINE 2-HYDROXY-3-(4-FLUOROPHENYL)PYRIDINE 426823-48-5 C11H8FNO
2-Hydroxy-4,6-diisopropylpyrimidine 2-Hydroxy-4,6-diisopropylpyrimidine 1080650-04-9 C10H16N2O
3-Amino-6-(iso-propenyl)pyridine 3-Amino-6-(iso-propenyl)pyridine 1314354-14-7 C8H10N2
3-Bromo-2-(1,4-dioxan-2-yl)pyridine 3-Bromo-2-(1,4-dioxan-2-yl)pyridine 1622834-84-7 C9H10BrNO2
3-Bromo-2-fluoro-6-(n-propyl)pyridine 3-Bromo-2-fluoro-6-(n-propyl)pyridine 1622842-98-1 C8H9BrFN
3-AMINO-6-(TETRAHYDROPYRAN-4-YL)PYRIDINE 3-AMINO-6-(TETRAHYDROPYRAN-4-YL)PYRIDINE 1373148-09-4 C10H14N2O
3-BROMO-2-(2-TETRAHYDROPYRANYL)PYRIDINE 3-BROMO-2-(2-TETRAHYDROPYRANYL)PYRIDINE 1622834-35-8 C10H12BrNO
3-Bromo-2-(3-thienyl)pyridine 3-Bromo-2-(3-thienyl)pyridine 1417519-32-4 C9H6BrNS
3-BROMO-4-(2-METHYLPIPERIDIN-1-YL)PYRIDINE 3-BROMO-4-(2-METHYLPIPERIDIN-1-YL)PYRIDINE 1288988-05-5 C11H15BrN2
3-Bromo-4-(2-trifluoromethylphenyl)pyridine 3-Bromo-4-(2-trifluoromethylphenyl)pyridine 1374664-77-3 C12H7BrF3N
3-BROMO-4-(4-METHYLIMIDAZOL-1-YL)PYRIDINE 3-BROMO-4-(4-METHYLIMIDAZOL-1-YL)PYRIDINE 1289130-14-8 C9H8BrN3
3-Bromo-5-(5-pyrimidyl)pyridine 3-Bromo-5-(5-pyrimidyl)pyridine 1314355-76-4 C9H6BrN3
3-Bromo-6-(3-hydroxypiperidin-1-yl)pyridine 3-Bromo-6-(3-hydroxypiperidin-1-yl)pyridine 1159815-32-3 C10H13BrN2O
4-(4-CHLOROPHENYL)PYRIDIN-3-AMINE 4-(4-CHLOROPHENYL)PYRIDIN-3-AMINE 349483-97-2 C11H9ClN2
4-Amino-3,2'-bipyridine 4-Amino-3,2'-bipyridine 71783-61-4 C10H9N3
4-Amino-6-(4-pyridyl)-2-cyclopropylpyrimidine 4-Amino-6-(4-pyridyl)-2-cyclopropylpyrimidine 1159814-91-1 C12H12N4
4-Bromo-2-(1H-pyrazol-1-yl)pyridine 4-Bromo-2-(1H-pyrazol-1-yl)pyridine 1159814-68-2 C8H6BrN3
4-Bromo-2-(3-trifluoromethylphenyl)pyridine 4-Bromo-2-(3-trifluoromethylphenyl)pyridine 1215071-75-2 C12H7BrF3N
4-Bromo-2-(methylethylamino)pyridine 4-Bromo-2-(methylethylamino)pyridine 1142194-26-0 C8H11BrN2
4-Bromo-3-amino-6-(2-fluorophenyl)pyridine 4-Bromo-3-amino-6-(2-fluorophenyl)pyridine 1381935-30-3 C11H8BrFN2
4-Bromo-3-amino-6-phenylpyridine 4-Bromo-3-amino-6-phenylpyridine 1381934-02-6 C11H9BrN2
4-Bromo-5-methyl-2-(tert-butoxy)pyridine 4-Bromo-5-methyl-2-(tert-butoxy)pyridine 1357580-35-8 C10H14BrNO
4-CHLORO-3-(CYCLOPENTOXY)PYRIDINE 4-CHLORO-3-(CYCLOPENTOXY)PYRIDINE 1394978-16-5 C10H12ClNO
4-Hydroxy-2-(2-pyridyl)pyridine 4-Hydroxy-2-(2-pyridyl)pyridine 14712-32-4 C10H8N2O
5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)picolinonitrile 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-(trifluoromethyl)picolinonitrile 2222333-25-5 C13H14BF3N2O2
6-(4-TERT-BUTYLPHENYL)PYRIDIN-3-AMINE 6-(4-TERT-BUTYLPHENYL)PYRIDIN-3-AMINE 1110656-27-3 C15H18N2
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