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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
5-BROMO-4-METHOXYPYRIDIN-3-AMINE 5-BROMO-4-METHOXYPYRIDIN-3-AMINE 31872-78-3 C6H7BrN2O
1-(1-ADAMANTYL)PYRIDINIUM BROMIDE 1-(1-ADAMANTYL)PYRIDINIUM BROMIDE 19984-57-7 C15H20BrN
6-Bromo-5-ethoxypyridin-3-amine 6-Bromo-5-ethoxypyridin-3-amine 1020253-84-2 C7H9BrN2O
5,6-DIHYDROTHIENO[2,3-C]PYRIDIN-7(4H)-ONE 5,6-DIHYDROTHIENO[2,3-C]PYRIDIN-7(4H)-ONE 14470-51-0 C7H7NOS
2-AMINO-5-CHLORO-3-METHYLPYRIDINE HEMIHYDRATE 2-AMINO-5-CHLORO-3-METHYLPYRIDINE HEMIHYDRATE 1173019-45-8 C12H16Cl2N4O
2-Pyridinecarboxylicacid,4-cyano-(9CI) 2-Pyridinecarboxylicacid,4-cyano-(9CI) 640296-19-1 C7H4N2O2
4-Pyridinecarbonitrile,2-formyl-(9CI) 4-Pyridinecarbonitrile,2-formyl-(9CI) 116308-38-4 C7H4N2O
Furo[3,2-b]pyridin-3(2H)-one,2-methyl-(9CI) Furo[3,2-b]pyridin-3(2H)-one,2-methyl-(9CI) 107096-03-7 C8H7NO2
7(6H)-Isoquinolinone,5,8-dihydro-(9CI) 7(6H)-Isoquinolinone,5,8-dihydro-(9CI) 228271-52-1 C9H9NO
2(1H)-Pyridinone,5-fluoro-,hydrazone(9CI) 2(1H)-Pyridinone,5-fluoro-,hydrazone(9CI) 145934-90-3 C5H6FN3
3-Pyridineethanimidamide(9CI) 3-Pyridineethanimidamide(9CI) 474310-74-2 C7H9N3
2-Pyridinamine,6-(1,1-dimethylethyl)-(9CI) 2-Pyridinamine,6-(1,1-dimethylethyl)-(9CI) 97634-83-8 C9H14N2
5-ethyl-2,3-pyridine dicarboxylic acid 5-ethyl-2,3-pyridine dicarboxylic acid C9H9NO4
2-Bromo-3-iodo-4-picoline 2-Bromo-3-iodo-4-picoline C6H5BrIN
4-Bromo-5-fluoro-2-hydroxy-3-nitropyridine 4-Bromo-5-fluoro-2-hydroxy-3-nitropyridine C5H2BrFN2O3
4-bromo-2-Amino Pyridine 4-bromo-2-Amino Pyridine C5H5BrN2
2-Cyanopyridine-3-boronic acid neopentyl glycol ester 2-Cyanopyridine-3-boronic acid neopentyl glycol ester 868944-75-6 C11H13BN2O2
4-Amino-5-chloronicotinic acid 4-Amino-5-chloronicotinic acid 52834-09-0 C6H5ClN2O2
2,3-DIAMINO-6-CHLOROPYRIDINE 2,3-DIAMINO-6-CHLOROPYRIDINE C5H6ClN3
2-chloro-N-[2-(diethylamino)ethyl]pyridine-4-carboxamide 2-chloro-N-[2-(diethylamino)ethyl]pyridine-4-carboxamide 1019383-26-6 C12H18ClN3O
5-Amino-2-chloro-4-methylpyridine 5-Amino-2-chloro-4-methylpyridine C6H7ClN2
3-(2-chloroethyl)-4H-pyrido[1,2-a]pyrimidin-4-one 3-(2-chloroethyl)-4H-pyrido[1,2-a]pyrimidin-4-one 887582-84-5 C10H9ClN2O
7-[4-(Diethylamino)-2-ethoxyphenyl]-7-(2-methyl-1-octyl-1H-indol-3-yl)furo[3,4-b]pyridin-5(7H)-one 7-[4-(Diethylamino)-2-ethoxyphenyl]-7-(2-methyl-1-octyl-1H-indol-3-yl)furo[3,4-b]pyridin-5(7H)-one 87563-89-1 C36H45N3O3
2,4,6-Tribromopyridine 1-oxide 2,4,6-Tribromopyridine 1-oxide 170875-37-3 C5H2Br3NO
2-(TRIFLUOROACETOXY)PYRIDINE 2-(TRIFLUOROACETOXY)PYRIDINE 96254-05-6 C7H4F3NO2
4,6-dichloropyridin-3-ol 4,6-dichloropyridin-3-ol 1196157-47-7 C5H3Cl2NO
Potassium5-fluoropyridine-2-trifluoroborate Potassium5-fluoropyridine-2-trifluoroborate 1150654-92-4 C5H3BF4KN
4548-45-2 4548-45-2 4548-45-2
ARRY-424704, ARRY-704 ARRY-424704, ARRY-704 869357-68-6 C16H17FIN3O4
1-(5 -fluoropyridin-2-yl)ethanamine 1-(5 -fluoropyridin-2-yl)ethanamine 915720-57-9 C7H9FN2
2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine 1012084-56-8 C12H18BNO2
3-cyano-5-fluoro-2-methoxypyridine 3-cyano-5-fluoro-2-methoxypyridine 1256789-86-2 C7H5FN2O
(2-Bromo-pyridin-4-ylmethyl)-isopropyl-amine (2-Bromo-pyridin-4-ylmethyl)-isopropyl-amine 1289386-60-2 C9H13BrN2
(2-Bromo-pyridin-4-ylmethyl)-ethyl-amine (2-Bromo-pyridin-4-ylmethyl)-ethyl-amine 1289386-37-3 C8H11BrN2
4-amino-6-chloropicolinaldehyde 4-amino-6-chloropicolinaldehyde 1060809-65-5 C6H5ClN2O
2-aMinopyridin-3-ylboronic acid hydrochloride 2-aMinopyridin-3-ylboronic acid hydrochloride 85495-56-3 C28H25F4N11O4
4-TRIFLUOROMETHYL-3-FORMYLPYRIDINE 4-TRIFLUOROMETHYL-3-FORMYLPYRIDINE 872626-76-1 C7H4F3NO
6-(2-THIENYL)-2-PYRIDINECARBOXALDEHYDE 6-(2-THIENYL)-2-PYRIDINECARBOXALDEHYDE 208111-00-6 C10H7NOS
6-SULFONICOTINIC ACID 6-SULFONICOTINIC ACID 17624-03-2 C6H5NO5S
2,2'-Dipyridyl N-oxide 2,2'-Dipyridyl N-oxide 33421-43-1 C10H8N2O
5-CYANO-2-IODOPYRIDINE 5-CYANO-2-IODOPYRIDINE 289470-22-0 C6H3IN2
2-Chloro-3-sulfonylchloridepyridine 2-Chloro-3-sulfonylchloridepyridine
3,5-Dibromo-4-chloropyridine-2-carboxylic acid 3,5-Dibromo-4-chloropyridine-2-carboxylic acid 698393-07-6 C6H2Br2ClNO2
6-CHLORO-PYRIDINE-2-CARBONYL CHLORIDE 6-CHLORO-PYRIDINE-2-CARBONYL CHLORIDE 80099-98-5 C6H3Cl2NO
Acetic acid, (2-pyridinylthio)-, ethyl ester (9CI) Acetic acid, (2-pyridinylthio)-, ethyl ester (9CI) 28856-92-0 C9H11NO2S
Pyridine, 3-bromo-5-(bromomethyl)- (9CI) Pyridine, 3-bromo-5-(bromomethyl)- (9CI) 145743-85-7 C6H5Br2N
Pyridine, 2-bromo-5-(chloromethyl)- (9CI) Pyridine, 2-bromo-5-(chloromethyl)- (9CI) 168173-56-6 C6H5BrClN
Furo[2,3-c]pyridin-7(6H)-one, 2,3-dihydro- (9CI) Furo[2,3-c]pyridin-7(6H)-one, 2,3-dihydro- (9CI) 588732-72-3 C7H7NO2
6-Amino-N-hydroxy-3-pyridinecarboximidamide 6-Amino-N-hydroxy-3-pyridinecarboximidamide 468068-28-2 C6H8N4O
N-METHYL-3-CYANO-2-HYDROXY-4-METHYLPRIDINE N-METHYL-3-CYANO-2-HYDROXY-4-METHYLPRIDINE
2-phenoxypyridin-3-amine 2-phenoxypyridin-3-amine 28664-62-2 C11H10N2O
N-(4-bromophenyl)-2-chloropyridine-4-carboxamide N-(4-bromophenyl)-2-chloropyridine-4-carboxamide 1019372-53-2 C12H8BrClN2O
2-Pyridinecarboxylic  acid,3-chloro-5-(trifluoromethyl)-,methyl  ester 2-Pyridinecarboxylic acid,3-chloro-5-(trifluoromethyl)-,methyl ester 655235-65-7 C8H5ClF3NO2
2-(1,1-Diethoxymethyl)pyridine-3-boronic acid pinacol ester 2-(1,1-Diethoxymethyl)pyridine-3-boronic acid pinacol ester 1218790-41-0 C16H26BNO4
Pyridine, 2-chloro-3-hydrazino- (9CI) Pyridine, 2-chloro-3-hydrazino- (9CI) 117087-45-3 C5H6ClN3
2-CHLORO-6-PHENYLPYRIDINE-4-CARBALDEHYDE 2-CHLORO-6-PHENYLPYRIDINE-4-CARBALDEHYDE 881402-38-6 C12H8ClNO
2-Pyridinecarboxylicacid,3-fluoro-1,6-dihydro-6-oxo-(9CI) 2-Pyridinecarboxylicacid,3-fluoro-1,6-dihydro-6-oxo-(9CI) 604774-05-2 C6H4FNO3
7-Quinolinamine,4-methyl-(9CI) 7-Quinolinamine,4-methyl-(9CI) 114058-79-6 C10H10N2
Furo[3,2-b]pyridine-2-methanol(9CI) Furo[3,2-b]pyridine-2-methanol(9CI) 162537-61-3 C8H7NO2
3-Pyridinamine,2,6-difluoro-(9CI) 3-Pyridinamine,2,6-difluoro-(9CI) 108118-69-0 C5H4F2N2
2-Pyridinecarbonitrile,5-amino-3-methoxy-(9CI) 2-Pyridinecarbonitrile,5-amino-3-methoxy-(9CI) 573762-39-7 C7H7N3O
2(1H)-Pyridinone,6-amino-4-hydroxy-(9CI) 2(1H)-Pyridinone,6-amino-4-hydroxy-(9CI) 104767-38-6 C5H6N2O2
2,4,6-TRIMETHYLPYRIDINE-3-BORONIC ACID 2,4,6-TRIMETHYLPYRIDINE-3-BORONIC ACID 1029654-17-8 C8H12BNO2
2-CHLOROMETHYL-3,5-DIMETHYL-4-NITROPYRIDINE 2-CHLOROMETHYL-3,5-DIMETHYL-4-NITROPYRIDINE 153476-68-7 C8H9ClN2O2
Pyridine, 4-bromo-2,5-dichloro- Pyridine, 4-bromo-2,5-dichloro- C5H2BrCl2N
5-Bromo-2-Chloro-3-nitro-4-methylpyridine 5-Bromo-2-Chloro-3-nitro-4-methylpyridine C6H4BrClN2O2
3,4-Dihydro-2H-pyrano[3,2-b]pyridine 3,4-Dihydro-2H-pyrano[3,2-b]pyridine 70381-92-9 C8H9NO
2,4,5-Trichloropyridine 2,4,5-Trichloropyridine 55934-01-5 C5H2Cl3N
4-bromo-2,6-difluoropyridine 4-bromo-2,6-difluoropyridine 903513-58-6 C5H2BrF2N
6-Ethyloctahydropyrrolo[3,4-b]pyridine 6-Ethyloctahydropyrrolo[3,4-b]pyridine 1141669-88-6 C9H18N2
5,7-Dichloropyrido[4,3-d]pyrimidin-4(3H)-one 5,7-Dichloropyrido[4,3-d]pyrimidin-4(3H)-one 918898-11-0 C7H3Cl2N3O
2-Chloro-3-fluoropyridin-4-ol 2-Chloro-3-fluoropyridin-4-ol 1184172-46-0 C5H3ClFNO
4-BroMopyridine-2-sulfonyl chloride 4-BroMopyridine-2-sulfonyl chloride 1060808-87-8 C5H3BrClNO2S
2-(3-Methoxypyridin-4-yl)ethanaMine 2-(3-Methoxypyridin-4-yl)ethanaMine 1060801-82-2 C8H12N2O
4-Oxo-1-propyl-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid 4-Oxo-1-propyl-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyriMidine-2-carboxylic acid 1086386-69-7 C14H13N3O3
3-AMINO-2-(4-FLUOROPHENOXY)PYRIDINE 3-AMINO-2-(4-FLUOROPHENOXY)PYRIDINE 175135-64-5 C11H9FN2O
1-PYRIDIN-3-YL-CYCLOPROPYLAMINE 1-PYRIDIN-3-YL-CYCLOPROPYLAMINE 503417-38-7 C8H10N2
5-BROMO-2,2'-DIETHOXY-4,5'-BIPYRIDINE 5-BROMO-2,2'-DIETHOXY-4,5'-BIPYRIDINE 871269-04-4 C14H15BrN2O2
2-BROMO-3-METHYLPYRIDINE-5-BORONIC ACID PINACOL ESTER 2-BROMO-3-METHYLPYRIDINE-5-BORONIC ACID PINACOL ESTER 1256360-64-1 C12H17BBrNO2
6-BROMO-4-METHYLPYRIDIN-3-YLBORONIC ACID 6-BROMO-4-METHYLPYRIDIN-3-YLBORONIC ACID 1072945-75-5 C6H7BBrNO2
6-BROMO-2,4-DIMETHYLPYRIDIN-3-YLBORONIC ACID 6-BROMO-2,4-DIMETHYLPYRIDIN-3-YLBORONIC ACID 1072944-23-0 C7H9BBrNO2
METHANESULFONIC ACID 2-CHLOROPYRIDIN-4-YLMETHYL ESTER METHANESULFONIC ACID 2-CHLOROPYRIDIN-4-YLMETHYL ESTER 680569-47-5 C7H8ClNO3S
4-amino-3,5-dichloro-6-fluoro-2-pyridone 4-amino-3,5-dichloro-6-fluoro-2-pyridone 94133-62-7 C5H3Cl2FN2O
4-Methyl-3-nitropyridine hydrochloride 4-Methyl-3-nitropyridine hydrochloride 856835-53-5 C6H7ClN2O2
2,6-(Dichloromethyl)pyridine hydrochloride 2,6-(Dichloromethyl)pyridine hydrochloride
4-Amino-3-ethylbenzoic acid 4-Amino-3-ethylbenzoic acid 51688-75-6 C9H11NO2
BLUE 203 BLUE 203 98660-18-5 C34H41N3O3
2-CHLORO-5-PHENYLPYRIDINE-3-CARBOXALDEH& 2-CHLORO-5-PHENYLPYRIDINE-3-CARBOXALDEH& 176433-57-1 C12H8ClNO
Carbamic acid, (3-amino-4-pyridinyl)-, 1,1-dimethylethyl ester (9CI) Carbamic acid, (3-amino-4-pyridinyl)-, 1,1-dimethylethyl ester (9CI) 183311-28-6 C10H15N3O2
Pyridine, 2-fluoro-5-methoxy- (9CI) Pyridine, 2-fluoro-5-methoxy- (9CI) 136888-79-4 C6H6FNO
3-Amino-2-Bromo-5-fluoropyridine 3-Amino-2-Bromo-5-fluoropyridine C5H4BrFN2
NSC306665 NSC306665 53268-33-0 C6H7N3S
2-METHOXY-4,6-DIMETHYLNICOTINONITRILE 2-METHOXY-4,6-DIMETHYLNICOTINONITRILE 65515-39-1 C9H10N2O
2,6,7-Trichloro-3-(trifluoromethyl)quinoxaline 2,6,7-Trichloro-3-(trifluoromethyl)quinoxaline 281209-13-0 C9H2Cl3F3N2
4-Pyridinecarboxylicacid,1,2-dihydro-5-hydroxy-2-oxo-(9CI) 4-Pyridinecarboxylicacid,1,2-dihydro-5-hydroxy-2-oxo-(9CI) 132829-86-8 C6H5NO4
2-Pyridinemethanamine,5-fluoro-(9CI) 2-Pyridinemethanamine,5-fluoro-(9CI) 561297-96-9 C6H7FN2
2-Pyridinecarboxylicacid,5-nitro-,ethylester(9CI) 2-Pyridinecarboxylicacid,5-nitro-,ethylester(9CI) 30563-98-5 C8H8N2O4
1,2-diethyl-3-hydroxypyridin-4-one 1,2-diethyl-3-hydroxypyridin-4-one 115900-75-9 C9H13NO2
tert-butyl 5-aminopyridin-3-yl(isopropyl)carbamate tert-butyl 5-aminopyridin-3-yl(isopropyl)carbamate C13H21N3O2
3,5-DIBROMO-2-CHLORO-4-METHYLPYRIDINE 3,5-DIBROMO-2-CHLORO-4-METHYLPYRIDINE 1000017-92-4 C6H4Br2ClN
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