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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-(1-ACETYL-,4-DIHYDROPYRID-4-YL)INDOLE 3-(1-ACETYL-,4-DIHYDROPYRID-4-YL)INDOLE 34981-12-9 C15H14N2O
2-ACETAMIDO-5-NITRO-4-PICOLINE 2-ACETAMIDO-5-NITRO-4-PICOLINE 90765-02-9 C8H9N3O3
3-Amino-2,4-dimethylpyridine 3-Amino-2,4-dimethylpyridine 1073-21-8 C7H10N2
2,3,5-TRIFLUOROPYRIDINE-4-CARBOXYLIC ACID, 97 2,3,5-TRIFLUOROPYRIDINE-4-CARBOXYLIC ACID, 97 675602-91-2 C6H2F3NO2
4-CYANO-2-METHYLPYRIDINE 4-CYANO-2-METHYLPYRIDINE 2214-53-1 C7H6N2
3-CHLORO-4-NITROPYRIDINE N-OXIDE 3-CHLORO-4-NITROPYRIDINE N-OXIDE 76439-45-7 C5H3ClN2O3
METHYL PICOLINIMIDATE METHYL PICOLINIMIDATE 19547-38-7 C7H8N2O
BIS(2,4,6-TRIMETHYLPYRIDINE)BROMONIUM HEXAFLUOROPHOSPHATE BIS(2,4,6-TRIMETHYLPYRIDINE)BROMONIUM HEXAFLUOROPHOSPHATE 188944-77-6 C16H22BrF6N2P
3-CHLORO-4-NITROPYRIDINE 3-CHLORO-4-NITROPYRIDINE 13194-60-0 C5H3ClN2O2
1,2-BIS(4-PYRIDYL)ETHANE 1,2-BIS(4-PYRIDYL)ETHANE 4916-57-8 C12H12N2
2-FLUORO-5-METHYLPYRIDINE-3-BORONIC ACID 2-FLUORO-5-METHYLPYRIDINE-3-BORONIC ACID 1072952-45-4 C6H7BFNO2
6-CHLOROIMIDAZO[1,2-A]PYRIDINE 6-CHLOROIMIDAZO[1,2-A]PYRIDINE 6188-25-6 C7H5ClN2
5-BROMO-3-METHYL-2-PYRIDINECARBALDEHYDE 5-BROMO-3-METHYL-2-PYRIDINECARBALDEHYDE 376587-53-0 C7H6BrNO
N-METHYL-N-(2-PYRIDYL)FORMAMIDE N-METHYL-N-(2-PYRIDYL)FORMAMIDE 67242-59-5 C7H8N2O
1-N-BOC-4-(3-AMINOMETHYLPYRIDYL)PIPERIDINE 1-N-BOC-4-(3-AMINOMETHYLPYRIDYL)PIPERIDINE 206274-21-7 C16H25N3O2
4-Propylpyridine 4-Propylpyridine 1122-81-2 C8H11N
4-(BOC-AMINOMETHYL)PYRIDINE 4-(BOC-AMINOMETHYL)PYRIDINE 111080-65-0 C11H16N2O2
5-Bromo-2-(4-Boc-piperazin-1-yl)pyridine 5-Bromo-2-(4-Boc-piperazin-1-yl)pyridine 364794-58-1 C10H14BrN3
PYRIDINE-2,4-DICARBONITRILE PYRIDINE-2,4-DICARBONITRILE 29181-50-8 C7H3N3
Pyridine, 2-chloro-4-(chloromethyl)- (9CI) Pyridine, 2-chloro-4-(chloromethyl)- (9CI) 101990-73-2 C6H5Cl2N
5-CHLORO-2-HYDROXYPYRIDINE 5-CHLORO-2-HYDROXYPYRIDINE 73018-09-4 C5H4ClNO
TERT-BUTYL 4-FORMYLPYRIDIN-3-YLCARBAMATE TERT-BUTYL 4-FORMYLPYRIDIN-3-YLCARBAMATE 116026-95-0 C11H14N2O3
4-AMINO-PYRIDINE-3-SULFONIC ACID 4-AMINO-PYRIDINE-3-SULFONIC ACID 29452-57-1 C5H6N2O3S
3,4-PYRIDINEDICARBOXIMIDE 3,4-PYRIDINEDICARBOXIMIDE 4664-01-1 C7H4N2O2
4-Pyridinemethanol,2-methoxy-(9CI) 4-Pyridinemethanol,2-methoxy-(9CI) 123148-66-3 C7H9NO2
2-Chloro-3-nitro-5-pyridinecarboxylic acid 2-Chloro-3-nitro-5-pyridinecarboxylic acid 7477-10-3 C6H3ClN2O4
3-AMINO-2-CHLORO-ISONICOTINIC ACID METHYL ESTER 3-AMINO-2-CHLORO-ISONICOTINIC ACID METHYL ESTER 173435-41-1 C7H7ClN2O2
2,5-Dichloro-3-fluoropyridine 2,5-Dichloro-3-fluoropyridine 103999-77-5 C5H2Cl2FN
2-Amino-3-bromo-5-(trifluoromethyl)-pyridine 2-Amino-3-bromo-5-(trifluoromethyl)-pyridine 79456-30-7 C6H4BrF3N2
6-BROMOPYRIDINE-2,3-DIAMINE 6-BROMOPYRIDINE-2,3-DIAMINE 129012-04-0 C5H6BrN3
N-METHYL-4-PIPERIDINECARBOXYLIC ACID METHYL ESTER N-METHYL-4-PIPERIDINECARBOXYLIC ACID METHYL ESTER 1690-75-1 C8H15NO2
2-Pyridinecarbaldehyde oxime 2-Pyridinecarbaldehyde oxime 873-69-8 C6H6N2O
6-BENZYL-6,7-DIHYDRO-5H-PYRROLO[3,4-B]PYRIDINE 6-BENZYL-6,7-DIHYDRO-5H-PYRROLO[3,4-B]PYRIDINE 109966-30-5 C14H14N2
2-(1,3-DIOXOLAN-2-YL)-6-METHYLPYRIDINE 2-(1,3-DIOXOLAN-2-YL)-6-METHYLPYRIDINE 92765-75-8 C9H11NO2
3-ACETOXYPYRIDINE 3-ACETOXYPYRIDINE 17747-43-2 C7H7NO2
4-METHOXY-7-AZAINDOLE 4-METHOXY-7-AZAINDOLE 122379-63-9 C8H8N2O
2-ACETAMIDO-5-FLUORO-4-PICOLINE 2-ACETAMIDO-5-FLUORO-4-PICOLINE 475060-21-0 C8H9FN2O
N-BOC-2-AMINOMETHYLPYRIDINE  97 N-BOC-2-AMINOMETHYLPYRIDINE 97 134807-28-6 C11H16N2O2
ETHYL 6-METHYLPYRIDINE-3-CARBOXYLATE ETHYL 6-METHYLPYRIDINE-3-CARBOXYLATE 21684-59-3 C9H11NO2
ETHYL 6-(CHLOROMETHYL)PYRIDINE-2-CARBOXYLATE ETHYL 6-(CHLOROMETHYL)PYRIDINE-2-CARBOXYLATE 49668-99-7 C9H10ClNO2
2-AMINOPYRIDINE-3-BORONIC ACID, PINACOL ESTER 2-AMINOPYRIDINE-3-BORONIC ACID, PINACOL ESTER 1073354-97-8 C11H17BN2O2
2,6-DICHLOROPYRIDINE-3-BORONIC ACID PINACOL ESTER 2,6-DICHLOROPYRIDINE-3-BORONIC ACID PINACOL ESTER 1073371-78-4 C11H14BCl2NO2
(4-AMINO-PYRIDIN-3-YL)-METHANOL (4-AMINO-PYRIDIN-3-YL)-METHANOL 138116-34-4 C6H8N2O
3-CHLORO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 3-CHLORO-4-(4,4,5,5-TETRAMETHYL-[1,3,2]DIOXABOROLAN-2-YL)PYRIDINE 458532-90-6 C11H15BClNO2
2,3,5,6-TETRAFLUORO-4-PYRIDINOL 2,3,5,6-TETRAFLUORO-4-PYRIDINOL 2693-66-5 C5HF4NO
3-CYANO-2-FLUORO-6-PICOLINE 3-CYANO-2-FLUORO-6-PICOLINE 54957-80-1 C7H5FN2
2,5-DIBROMONICOTINIC ACID 2,5-DIBROMONICOTINIC ACID 29312-99-0 C6H3Br2NO2
3,6-DIFLUORO PYRIDINE-2-CARBOXYLIC ACID 3,6-DIFLUORO PYRIDINE-2-CARBOXYLIC ACID 851386-45-3 C6H3F2NO2
2-METHOXY-5-PICOLINE 2-METHOXY-5-PICOLINE 13472-56-5 C7H9NO
2,4-DIFLUORO-3-IODO-PYRIDINE 2,4-DIFLUORO-3-IODO-PYRIDINE 837364-88-2 C5H2F2IN
4-(3-NITRO-PYRIDIN-2-YL)-PIPERAZINE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 4-(3-NITRO-PYRIDIN-2-YL)-PIPERAZINE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 153473-24-6 C14H20N4O4
4-Bromo-2,3,5,6-tetrafluoropyridine 4-Bromo-2,3,5,6-tetrafluoropyridine 3511-90-8 C5BrF4N
nicotinic anhydride nicotinic anhydride 16837-38-0 C12H8N2O3
4-Bromo-3-iodopyridine 4-Bromo-3-iodopyridine 89167-20-4 C5H3BrIN
5-ETHYLPYRIDINE-2-CARBOXYLIC ACID 5-ETHYLPYRIDINE-2-CARBOXYLIC ACID 770-08-1 C8H9NO2
(R)-2-(1-HYDROXYETHYL)PYRIDINE (R)-2-(1-HYDROXYETHYL)PYRIDINE 27911-63-3 C7H9NO
5-BROMO-2-CHLORO-3-METHOXYPYRIDINE 5-BROMO-2-CHLORO-3-METHOXYPYRIDINE 286947-03-3 C6H5BrClNO
3,5-DIBROMO-2-NITROPYRIDINE 3,5-DIBROMO-2-NITROPYRIDINE 610261-34-2 C5H2Br2N2O2
2,5-DICHLORO-4-METHYLPYRIDINE 2,5-DICHLORO-4-METHYLPYRIDINE 886365-00-0 C6H5Cl2N
2-CHLORO-5-IODO-3-(TRIFLUOROMETHYL)-PYRIDINONE 2-CHLORO-5-IODO-3-(TRIFLUOROMETHYL)-PYRIDINONE 887707-25-7 C6H2ClF3IN
4-PYRIDINAMINE, 2-METHOXY-5-NITRO- 4-PYRIDINAMINE, 2-METHOXY-5-NITRO- 127356-38-1 C6H7N3O3
Methyl 6-(hydroxymethyl)nicotinate Methyl 6-(hydroxymethyl)nicotinate 56026-36-9 C8H9NO3
3,5-Dichloro-4-pyridone-N-acetic acid 3,5-Dichloro-4-pyridone-N-acetic acid 56187-37-2 C7H5Cl2NO3
2-CHLORO-5-NITRONICOTINIC ACID ETHYL ESTER 2-CHLORO-5-NITRONICOTINIC ACID ETHYL ESTER 151322-83-7 C8H7ClN2O4
5-(Methoxycarbonyl)pyridine-2-carboxylic acid 5-(Methoxycarbonyl)pyridine-2-carboxylic acid 17874-79-2 C8H7NO4
2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE HYDROCHLORIDE 2,3-DIHYDRO-1H-PYRROLO[3,4-C]PYRIDINE HYDROCHLORIDE 651558-58-6 C7H9ClN2
3-CHLORO-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXALDEHYDE 3-CHLORO-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXALDEHYDE 175277-50-6 C7H3ClF3NO
N,N'-DIFLUORO-2,2'-BIPYRIDINIUM BIS(TETRAFLUOROBORATE) N,N'-DIFLUORO-2,2'-BIPYRIDINIUM BIS(TETRAFLUOROBORATE) 178439-26-4 C10H8BF6N2+
4-CHLORO-NICOTINIC ACID ETHYL ESTER HYDROCHLORIDE 4-CHLORO-NICOTINIC ACID ETHYL ESTER HYDROCHLORIDE 37831-62-2 C8H8ClNO2
3-BROMO-5-METHYLPYRIDINE-4-CARBOXALDEHYDE 3-BROMO-5-METHYLPYRIDINE-4-CARBOXALDEHYDE 203569-15-7 C7H6BrNO
5-FLUORO-2-METHOXYPYRIDINE-4-BORONIC ACID 5-FLUORO-2-METHOXYPYRIDINE-4-BORONIC ACID 1043869-98-2 C6H7BFNO3
2-(4-Bromophenyl)pyriding 2-(4-Bromophenyl)pyriding 63996-36-1 C11H8BrN
4-CYANOPYRIDIN-3-YLBORONIC ACID 4-CYANOPYRIDIN-3-YLBORONIC ACID 874290-90-1 C6H5BN2O2
2-(AMINOCARBONYL)NICOTINIC ACID 2-(AMINOCARBONYL)NICOTINIC ACID 5860-70-8 C7H6N2O3
4-Phenoxypyridine 4-Phenoxypyridine 4783-86-2 C11H9NO
2-(4-NITROPHENOXY)-3-CHLORO-5-TRIFLUOROMETHYL PYRIDINE 2-(4-NITROPHENOXY)-3-CHLORO-5-TRIFLUOROMETHYL PYRIDINE 91618-22-3 C12H6ClF3N2O3
4-(6-BROMOPYRIDIN-2-YL)BENZALDEHYDE 4-(6-BROMOPYRIDIN-2-YL)BENZALDEHYDE 588727-65-5 C12H8BrNO
4,6-Dimethyl-3-nitropyridine 4,6-Dimethyl-3-nitropyridine 1074-99-3 C7H8N2O2
1-(3-AMINO-PYRIDIN-2-YL)-ETHANONE 1-(3-AMINO-PYRIDIN-2-YL)-ETHANONE 13210-25-8 C7H8N2O
4-CHLORO-2-NITROPYRIDINE 4-CHLORO-2-NITROPYRIDINE 65370-42-5 C5H3ClN2O2
3-FLUORO-4-HYDROXYPYRIDINE 3-FLUORO-4-HYDROXYPYRIDINE 22282-73-1 C5H4FNO
3-BROMO-4-METHOXY-PYRIDINE 3-BROMO-4-METHOXY-PYRIDINE 82257-09-8 C6H6BrNO
2,4,6-Trimethylpyridin-3-amine 2,4,6-Trimethylpyridin-3-amine 51467-70-0 C8H12N2
6-Chloropyridine-2-boronic acid 6-Chloropyridine-2-boronic acid 652148-90-8 C5H5BClNO2
4-Carboxy-4'-methyl-2,2'-bipyridine 4-Carboxy-4'-methyl-2,2'-bipyridine 103946-54-9 C12H10N2O2
CHEMPACIFIC 38158 CHEMPACIFIC 38158 78846-88-5 C6H5Cl2N
1-Methyl-2-pyridone 1-Methyl-2-pyridone 694-85-9 C6H7NO
Ethanone, 1-(3-hydroxy-2-pyridinyl)- (9CI) Ethanone, 1-(3-hydroxy-2-pyridinyl)- (9CI) 13210-29-2 C7H7NO2
7-Bromo-1,3-dihydro-imidazo[4,5-c]pyridin-2-one 7-Bromo-1,3-dihydro-imidazo[4,5-c]pyridin-2-one 161836-12-0 C6H4BrN3O
6-Benzyl-5,7-dihydro-5,7-dioxopyrrolo[3,4-b]pyridine 6-Benzyl-5,7-dihydro-5,7-dioxopyrrolo[3,4-b]pyridine 18184-75-3 C14H10N2O2
3,5-Difluoropicolinic acid 3,5-Difluoropicolinic acid 745784-04-7 C6H3F2NO2
3-(Aminomethyl)-5-bromopyridine 97% 3-(Aminomethyl)-5-bromopyridine 97% 135124-70-8 C6H7BrN2
3-METHYLPYRIDINE-2-BORONIC ACID 3-METHYLPYRIDINE-2-BORONIC ACID C6H8BNO2
3,5-Dibromopyridine-4-carboxylic acid 3,5-Dibromopyridine-4-carboxylic acid 13958-91-3 C6H3Br2NO2
5-Fluoro-2-nitropyridine 5-Fluoro-2-nitropyridine 779345-37-8 C5H3FN2O2
Diethyl 2,6-pyridinedicarboxylate Diethyl 2,6-pyridinedicarboxylate 15658-60-3 C11H13NO4
4-Pyrrolidin-2-ylpyridine 4-Pyrrolidin-2-ylpyridine 128562-25-4 C9H12N2
3-Chloro-4-pyridineboronic acid hydrate 3-Chloro-4-pyridineboronic acid hydrate 458532-98-4 C5H5BClNO2
2-AMINO-5-CHLORO-4-METHYL-3-NITROPYRIDINE 2-AMINO-5-CHLORO-4-METHYL-3-NITROPYRIDINE 148612-17-3 C6H6ClN3O2
3-FLUOROPYRIDINE-4-BORONIC ACID HYDRATE 3-FLUOROPYRIDINE-4-BORONIC ACID HYDRATE 1029880-18-9 C5H7BFNO3
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