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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
3,5-DIACETYL-1,4-DIHYDRO-2,6-LUTIDINE 3,5-DIACETYL-1,4-DIHYDRO-2,6-LUTIDINE 1079-95-4 C11H15NO2
6-(DIMETHYLAMINO)NICOTINALDEHYDE 6-(DIMETHYLAMINO)NICOTINALDEHYDE 149805-92-5 C8H10N2O
DIMETHYL 3,3'-BIPYRIDINE-5,5'-DICARBOXYLATE DIMETHYL 3,3'-BIPYRIDINE-5,5'-DICARBOXYLATE 128612-43-1 C14H12N2O4
4-AMINO-2,3,5-TRICHLOROPYRIDINE, 98 4-AMINO-2,3,5-TRICHLOROPYRIDINE, 98 28443-69-8 C5H3Cl3N2
3-Methoxy-2-methyl-1H-pyridin-4-one 3-Methoxy-2-methyl-1H-pyridin-4-one 76015-11-7 C7H9NO2
3-Chloro-5-methoxypyridine 3-Chloro-5-methoxypyridine 95881-83-7 C6H6ClNO
2,6-DIAMINO-4-CHLOROPYRIDINE 2,6-DIAMINO-4-CHLOROPYRIDINE 6309-00-8 C5H6ClN3
5-CARBOXYPYRIDINE-3-BORONIC ACID 5-CARBOXYPYRIDINE-3-BORONIC ACID 913836-03-0 C6H6BNO4
3-METHOXY-PYRIDINE-2-CARBALDEHYDE 3-METHOXY-PYRIDINE-2-CARBALDEHYDE 1849-53-2 C7H7NO2
NIALAMIDE NIALAMIDE 51-12-7 C16H18N4O2
Ethyl 3-Fluoropyridine-2-carboxylate Ethyl 3-Fluoropyridine-2-carboxylate 1187732-69-9 C8H8FNO2
2-(Pyridin-2-yl)phenol 2-(Pyridin-2-yl)phenol 33421-36-2 C11H9NO
2-METHOXYISONICOTINAMIDE 2-METHOXYISONICOTINAMIDE 105612-50-8 C7H8N2O2
2,3,4,5-Tetrahydro-2,8-dimethyl-5-[2-(6-methyl-3-pyridinyl)ethyl]-1H-pyrido[4,3-b]indole hydrochloride hydrate (1:2:2) 2,3,4,5-Tetrahydro-2,8-dimethyl-5-[2-(6-methyl-3-pyridinyl)ethyl]-1H-pyrido[4,3-b]indole hydrochloride hydrate (1:2:2) 1186653-04-2 C21H31Cl2N3O2
N,N-DiBoc-2-amino-4-bromopyridine N,N-DiBoc-2-amino-4-bromopyridine 1216620-65-3 C15H21BrN2O4
Benzyl 4-oxo-3,4-dihydropyridine-1(2H)-carboxylate Benzyl 4-oxo-3,4-dihydropyridine-1(2H)-carboxylate 185847-84-1 C13H13NO3
N-Benzyl-1,2,3,6-tetrahydropyridine N-Benzyl-1,2,3,6-tetrahydropyridine 40240-12-8 C12H15N
3-(4-AMINO-PYRIDIN-3-YL)-ACRYLIC ACID 3-(4-AMINO-PYRIDIN-3-YL)-ACRYLIC ACID C8H8N2O2
Furo[2,3-b]pyridine-3-carboxaldehyde (9CI) Furo[2,3-b]pyridine-3-carboxaldehyde (9CI) 109274-99-9 C8H5NO2
Thieno[3,2-b]pyridine, 3-amino- (6CI) Thieno[3,2-b]pyridine, 3-amino- (6CI) 120208-33-5 C7H6N2S
1-(5-BROMOPYRIMIDIN-2-YL)[1,4]DIAZEPANE
1-(5-BROMOPYRIMIDIN-2-YL)[1,4]DIAZEPANE 849021-44-9 C9H13BrN4
3-Bromo-pyridine-4-sulfonyl chloride 3-Bromo-pyridine-4-sulfonyl chloride 886371-33-1 C5H3BrClNO2S
Fluopicolide Fluopicolide 239110-15-7 C14H8Cl3F3N2O
3-Bromo-5-fluoro-2-methoxypyrdine 3-Bromo-5-fluoro-2-methoxypyrdine C6H5BrFNO
6,7-Dichloro-2-methyl-3-(trifluoromethyl)quinoxaline 6,7-Dichloro-2-methyl-3-(trifluoromethyl)quinoxaline 143309-87-9 C10H5Cl2F3N2
(5-Bromopyridin-2-yl)(pyrrolidin-1-yl)methanone (5-Bromopyridin-2-yl)(pyrrolidin-1-yl)methanone 742085-70-7 C10H11BrN2O
1,2,4-Triazine,5,6-diethyl-3-(2-pyridinyl)-(9CI) 1,2,4-Triazine,5,6-diethyl-3-(2-pyridinyl)-(9CI) 669707-13-5 C12H14N4
2-Pyridinemethanamine,alpha-ethyl-(9CI) 2-Pyridinemethanamine,alpha-ethyl-(9CI) 100155-73-5 C8H12N2
1H-Pyrrolo[2,3-b]pyridine-5-methanamine(9CI) 1H-Pyrrolo[2,3-b]pyridine-5-methanamine(9CI) 267876-25-5 C8H9N3
1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-(9CI) 1H-Pyrrolo[2,3-c]pyridine,2,3-dihydro-(9CI) 760919-39-9 C7H8N2
2,5-Dibromopyridine-4-carboxaldehyde 2,5-Dibromopyridine-4-carboxaldehyde 959244-28-1 C6H3Br2NO
2,6-Dimethyl-4-nitropyridine 2,6-Dimethyl-4-nitropyridine 4913-57-9 C7H8N2O2
3-Chloro-2,6-difluoropyridine 3-Chloro-2,6-difluoropyridine 52208-56-7 C5H2ClF2N
ETHYL 3-(4-AMINO-5-BROMOPYRIDIN-3-YL)ACRYLATE ETHYL 3-(4-AMINO-5-BROMOPYRIDIN-3-YL)ACRYLATE 912760-87-3 C10H11BrN2O2
N-(3-Bromo-5-nitropyridin-2-yl)acetamide N-(3-Bromo-5-nitropyridin-2-yl)acetamide 1065074-93-2 C7H6BrN3O3
3-Pyridinamine, 2-(2-phenylethenyl)- 3-Pyridinamine, 2-(2-phenylethenyl)- 209798-50-5 C13H12N2
5-(2-THIENYL)NICOTINIC ACID 5-(2-THIENYL)NICOTINIC ACID 306934-96-3 C10H7NO2S
2-(CYCLOHEXYLOXY)-5-IODOPYRIDINE 2-(CYCLOHEXYLOXY)-5-IODOPYRIDINE 902837-59-6 C11H14INO
2-(ethylamino)isonicotinonitrile 2-(ethylamino)isonicotinonitrile 87121-58-2 C8H9N3
Pyridine,2-chloro-4,6-dimethoxy- Pyridine,2-chloro-4,6-dimethoxy- 108279-89-6 C7H8ClNO2
3-CHLOROPYRIDINE-2-ACETIC ACID 3-CHLOROPYRIDINE-2-ACETIC ACID 885167-73-7 C7H6ClNO2
6-BROMOPYRIDO[2,3-D]PYRIMIDIN-4(1H)-ONE 6-BROMOPYRIDO[2,3-D]PYRIMIDIN-4(1H)-ONE 155690-79-2 C7H4BrN3O
4-(3'-PYRIDYL)PHENYLACETIC ACID 4-(3'-PYRIDYL)PHENYLACETIC ACID 51061-71-3 C13H11NO2
6-PIPERIDINONICOTINIC ACID 6-PIPERIDINONICOTINIC ACID 120800-50-2 C11H14N2O2
DIMETHYLAMINOPYRIDINE, POLYMER-BOUND DIMETHYLAMINOPYRIDINE, POLYMER-BOUND 82942-26-5 C8H8
N-(4-CHLORO-2-PYRIDINYL)-ACETAMIDE N-(4-CHLORO-2-PYRIDINYL)-ACETAMIDE 245056-66-0 C7H7ClN2O
2-AMINOPYRIDINE-D6 2-AMINOPYRIDINE-D6 203784-57-0 C5D6N2
2-AMINO-5,6-DIMETHYL-3-METHYLAMINOPYRIDINE 2-AMINO-5,6-DIMETHYL-3-METHYLAMINOPYRIDINE C8H13N3
3-HYDROXY-4-(5-NITROPYRIDYLAZO)PROPYLANI 3-HYDROXY-4-(5-NITROPYRIDYLAZO)PROPYLANI 143205-66-7 C17H22N5NaO6S
2-AMINO-4-NITROPYRIDINE-N-OXIDE 2-AMINO-4-NITROPYRIDINE-N-OXIDE 52092-45-2 C5H5N3O3
3-CHLORO-4-(TRIFLUOROMETHYL)PYRIDINE 3-CHLORO-4-(TRIFLUOROMETHYL)PYRIDINE 81565-19-7 C6H3ClF3N
3-CHLORO-5-(TRIFLUOROMETHYL)PYRID-2-YLHYDRAZINE 3-CHLORO-5-(TRIFLUOROMETHYL)PYRID-2-YLHYDRAZINE 89570-82-1 C6H5ClF3N3
4-(2-DIMETHYLAMINOETHYL)PYRIDINE 4-(2-DIMETHYLAMINOETHYL)PYRIDINE 38223-06-2 C9H14N2
3,5-DIHYDROXYPYRIDINE 3,5-DIHYDROXYPYRIDINE 3543-02-0 C5H5NO2
Bispyrithione Bispyrithione 3696-28-4 C10H8N2O2S2
2-IODONICOTINONITRILE 98 2-IODONICOTINONITRILE 98 490039-73-1 C6H3IN2
3-PYRIDINEMETHANOL N-OXIDE 3-PYRIDINEMETHANOL N-OXIDE 6968-72-5 C6H7NO2
(5-AMINOPYRIDIN-3-YL)BORONIC ACID (5-AMINOPYRIDIN-3-YL)BORONIC ACID 1169748-84-8 C5H7BN2O2
ETHYL 5-BROMO-2-HYDROXY-4-METHYLNICOTINATE ETHYL 5-BROMO-2-HYDROXY-4-METHYLNICOTINATE C9H10BrNO3
6-BROMOPYRIDO[2,3-D]PYRIMIDINE-2,4-DIAMINE 6-BROMOPYRIDO[2,3-D]PYRIMIDINE-2,4-DIAMINE 152941-69-0 C7H6BrN5
6-BROMO-5-IODOPYRIDIN-3-AMINE 6-BROMO-5-IODOPYRIDIN-3-AMINE 697300-68-8 C5H4BrIN2
2-Bromo-1-(2-chloropyridin-4-yl)ethanone 2-Bromo-1-(2-chloropyridin-4-yl)ethanone 23794-16-3 C7H5BrClNO
2,3,4-Trifluoropyridine 2,3,4-Trifluoropyridine 84477-04-3 C5H2F3N
3-Amino-2,6-dichloropyridine-4-carboxylic acid methyl ester 3-Amino-2,6-dichloropyridine-4-carboxylic acid methyl ester 883107-62-8 C7H6Cl2N2O2
5-Acetyl-2-cyanopyridine 5-Acetyl-2-cyanopyridine 249583-84-4 C8H6N2O
2-Bromo-4-Hydroxypyridine 2-Bromo-4-Hydroxypyridine 36935-40-9
2-Chloro-3-Fluoro-5-Iodo-4-Picoline 2-Chloro-3-Fluoro-5-Iodo-4-Picoline 153035-01-9 C6H4ClFIN
Pyrido[2,3-b]pyrazine, 6-methyl- (9CI) Pyrido[2,3-b]pyrazine, 6-methyl- (9CI) 155629-96-2 C8H7N3
2,6-Dimethyl-3,5-dibromopyridine 2,6-Dimethyl-3,5-dibromopyridine C7H7Br2N
4-BROMO-2,3-DIMETHYLPYRIDINE 4-BROMO-2,3-DIMETHYLPYRIDINE 259807-91-5 C7H8BrN
N-isopropyl-3-nitropyridin-2-amine N-isopropyl-3-nitropyridin-2-amine 26820-67-7 C8H11N3O2
2-AMINO-THIAZOLE-4-CARBOXYLAMIDE
2-AMINO-THIAZOLE-4-CARBOXYLAMIDE 118452-02-1 C4H5N3OS
2-(3'-PYRIDYL)PHENYLACETIC ACID
2-(3'-PYRIDYL)PHENYLACETIC ACID 675602-63-8 C13H11NO2
3-fluoro-4-cyanopyridine 3-fluoro-4-cyanopyridine C6H3FN2
2-Bromo-5-fluoro-2-hydroxypyrdine 2-Bromo-5-fluoro-2-hydroxypyrdine
2-Methoxy-5-nitro-3-picoline 2-Methoxy-5-nitro-3-picoline C7H8N2O3
6-Chloro-N-cyclohexylpyrazin-2-amine 6-Chloro-N-cyclohexylpyrazin-2-amine 642459-26-5 C10H14ClN3
1-(3-CHLOROPYRIDIN-2-YL)PIPERIDIN-4-AMINE 1-(3-CHLOROPYRIDIN-2-YL)PIPERIDIN-4-AMINE C10H14ClN3
3-Pyridinemethanamine,5-chloro-(9CI) 3-Pyridinemethanamine,5-chloro-(9CI) 138402-36-5 C6H7ClN2
4-Pyridinecarbonitrile,2-(1-piperazinyl)-(9CI) 4-Pyridinecarbonitrile,2-(1-piperazinyl)-(9CI) 305381-05-9 C10H12N4
3-Pyridinemethanamine,2-fluoro-(9CI) 3-Pyridinemethanamine,2-fluoro-(9CI) 205744-16-7 C6H7FN2
2-Pyridinemethanol,3,5-dimethyl-(9CI) 2-Pyridinemethanol,3,5-dimethyl-(9CI) 202932-05-6 C8H11NO
WAY 100635 WAY 100635 146714-97-8 C25H34N4O2
2-Chloro-5-iodo-3-nitropyridine 2-Chloro-5-iodo-3-nitropyridine 426463-05-0 C5H2ClIN2O2
3,5-Diiodo-4-hydroxypyridine 3,5-Diiodo-4-hydroxypyridine 7153-08-4 C5H3I2NO
3-Chloro-4-hydroxy-5-nitropyridine 3-Chloro-4-hydroxy-5-nitropyridine 31872-64-7 C5H3ClN2O3
5-[4-[2-(5-Ethyl-2-pyridyl)ethoxy]benzyl]-2,4-thiazolidinedione 5-[4-[2-(5-Ethyl-2-pyridyl)ethoxy]benzyl]-2,4-thiazolidinedione 105390-47-4 C19H20N2O3S
1-Benzyl-4-(4-methoxyphenyl)tetrahydropyridine 1-Benzyl-4-(4-methoxyphenyl)tetrahydropyridine 13314-69-7 C19H21NO
3-[2-(3-Chlorophenyl)ethyl]-2-pyridyl 1-methyl-4-piperidyl ketone hydrochloride 3-[2-(3-Chlorophenyl)ethyl]-2-pyridyl 1-methyl-4-piperidyl ketone hydrochloride 107256-31-5 C20H24Cl2N2O
3,4-Dichloro-5-nitropyridine 3,4-Dichloro-5-nitropyridine 56809-84-8 C5H2Cl2N2O2
3-Fluoro-6-bromo-2-pyridinecarboxaldehyde 3-Fluoro-6-bromo-2-pyridinecarboxaldehyde 885267-36-7 C6H3BrFNO
4-(3-Bromo-5-nitropyridin-2-yl)morpholine 4-(3-Bromo-5-nitropyridin-2-yl)morpholine 1065074-89-6 C9H10BrN3O3
(1-Methyl-4-piperidinyl)[3-[2-(3-chlorophenyl)ethyl]pyridinyl]methanone hydrochloride (1-Methyl-4-piperidinyl)[3-[2-(3-chlorophenyl)ethyl]pyridinyl]methanone hydrochloride 119770-60-4 C20H24Cl2N2O
5-Iodo-3-methyl-2-methylaminopyridine 5-Iodo-3-methyl-2-methylaminopyridine 942206-33-9 C7H9IN2
6-(Benzylamino)pyridine-3-boronic acid pinacol ester 6-(Benzylamino)pyridine-3-boronic acid pinacol ester 1073354-27-4 C18H23BN2O2
4-[2-(METHYLAMINO)ETHYL]PYRIDINE 4-[2-(METHYLAMINO)ETHYL]PYRIDINE 55496-55-4 C8H12N2
N-(6-aminopyridin-2-yl)acetamide N-(6-aminopyridin-2-yl)acetamide 1075-62-3 C7H9N3O
2-Methoxy-5-pyridineboronic acid hydrochloride 2-Methoxy-5-pyridineboronic acid hydrochloride 370864-57-6 C6H9BClNO3
3-bromo-2-(chloromethyl)pyridine 3-bromo-2-(chloromethyl)pyridine 122851-69-8 C6H5BrClN
Methyl 5-bromo-3-hydroxypicolinate Methyl 5-bromo-3-hydroxypicolinate 1242320-57-5 C7H6BrNO3
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