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Pyridine derivatives

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The important pyridine derivatives include niacin, nicotinamide, isonicotinoylhydrazine, nicotine, strychnine, and vitamin B6.

Vitamin B6 is a class of tetrasubstituted pyridine derivatives with coenzyme function, used clinically for the treatment of vomiting of pregnancy, radioactive vomiting, isoniazid poisoning, seborrheic dermatitis and pellagra, etc.

Pyridine is a kind of colorless or slightly yellow liquid with an alkalescence and special odor, naturally present in coal tar, shale oil, coal gas and petroleum. Miscible with water, alcohols, ethers, petroleum ether, oils, benzene, chloroform and most of other organic solvents, pyridine is an important chemical raw materials and solvents.

Similar to benzene with the same electronic structure pyridine has an almost hexagonal structure. The electron density of 2, 4, 6 sites is lower than that of 3, 5 sites due to the electronic absorption of nitrogen atoms in the ring. Therefore, in an acidic medium, electrophilic substitution reactions occur in the 3,5 positions and nucleophilic reactions such as amination, alkylation, arylation, acylation occur on the 2,4,6 position. Pyridine is a weak tertiary amine that can generate water-insoluble salts with various acids such as picric acid and perchloric acid in an ethanol solution; and pyridine hydrochloride ( C5H5N • HCl) can be generated by hydrochloric acid with pyridine due to its alkalescence. Piperidine can be generated from the hydrogenation of pyridine under the catalysis of nickel at 200 ℃ and 15 ~ 30MPa, or from the electrolysis reduction. It's relatively easier to be reduced but more difficult to be oxidized than benzene. But it can be oxidized by hydrogen peroxide or peroxy acids to form pyridine N-oxide, which is an important pyridine derivative.  Pyridine N-oxide can’t form a positively charged pyridinium cation after the oxidation of nitrogen atoms, which is therefore in favor of electrophilic substitution reaction of aryl group. Electrophilic substitution reactions of pyridine such as pyridine nitration, sulfonation and halogenation are difficult. But 3,5-dichloro-pyridine, or 3,4.5- trichloro pyridine can be obtained at more than 200 ℃ through halogenation which is slightly easier than the former two. Pyridine can form crystalline coordination compounds with various metal ions.

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Structure:
Chemical Name:
ethyl 1-((pyridin-4-yl)methyl) piperidine-4-carboxylate
CAS:
138030-54-3
MF:
C14H20N2O2
Structure:
Chemical Name:
3-BROMO-5-(METHYLTHIO)PYRIDINE
CAS:
142137-18-6
MF:
C6H6BrNS
Structure:
Chemical Name:
(4-METHYLPYRIDIN-3-YL)METHANOL
CAS:
4664-27-1
MF:
C7H9NO
Structure:
Chemical Name:
3-METHOXY-2-PYRIDINECARBOXYLIC ACID
CAS:
16478-52-7
MF:
C7H7NO3
Structure:
Chemical Name:
2-Amino-3,5-dinitro-6-methylpyridine
CAS:
25864-34-0
MF:
C6H6N4O4
Structure:
Chemical Name:
4-CYANO-2-IODOPYRIDINE
CAS:
114821-24-8
MF:
C6H3IN2
Structure:
Chemical Name:
2-TRIFLUOROMETHYL-3-CYANOPYRIDINE
CAS:
870066-15-2
MF:
C7H3F3N2
Structure:
Chemical Name:
Isoquinoline, 5-(bromomethyl)- (9CI)
CAS:
158654-74-1
MF:
C10H8BrN
Structure:
Chemical Name:
5-(tert-Butylcarbamoyl)pyridine-3-boronic acid
CAS:
913835-99-1
MF:
C10H15BN2O3
Structure:
Chemical Name:
5-BROMOPYRIDINE-3-SULPHONYL CHLORIDE HYDROCHLORIDE 95
CAS:
913836-25-6
MF:
C5H4BrCl2NO2S
Structure:
Chemical Name:
3,5-DIMETHOXYPYRIDINE-4-CARBOXALDEHYDE
CAS:
204862-70-4
MF:
C8H9NO3
Structure:
Chemical Name:
2-AMINO-3,5-DIFLUORO-4-(TRIFLUOROMETHYL)PYRIDINE
CAS:
883498-68-8
MF:
C6H3F5N2
Structure:
Chemical Name:
2,6-DICHLORO-5-FLUORONICOTINOYL CHLORIDE
CAS:
96568-02-4
MF:
C6HCl3FNO
Structure:
Chemical Name:
5-FORMYL-2-ISOPROXYPYRIDINE
CAS:
884495-35-6
MF:
C9H11NO2
Structure:
Chemical Name:
3-FLUORO-2-(4-MORPHOLINO)PYRIDINE
CAS:
693235-16-4
MF:
C9H11FN2O
Structure:
Chemical Name:
6-METHYL-2,2'-BIPYRIDINE
CAS:
56100-22-2
MF:
C11H10N2
Structure:
Chemical Name:
(3-FLUOROPYRIDIN-4-YL)METHANAMINE
CAS:
870063-62-0
MF:
C6H7FN2
Structure:
Chemical Name:
(5-METHOXYPYRIDIN-2-YL)METHANOL
CAS:
127978-70-5
MF:
C7H9NO2
Structure:
Chemical Name:
Pyridine, 2-ethynyl-5-methyl-, 1-oxide (9CI)
CAS:
499187-53-0
MF:
C8H7NO
Structure:
Chemical Name:
2(1H)-Pyridinone,5-methoxy-(9CI)
CAS:
61941-79-5
MF:
C6H7NO2
Structure:
Chemical Name:
4-HYDROXY-NICOTINIC ACID ETHYL ESTER
CAS:
57905-31-4
MF:
C8H9NO3
Structure:
Chemical Name:
Ethyl 6-bromo-7-methylimidazo[1,2-a]pyridine-2-carboxylate
CAS:
907945-87-3
MF:
C11H11BrN2O2
Structure:
Chemical Name:
5-IODO-2-PYRROLIDIN-1YLPYRIDINE
CAS:
494771-62-9
MF:
C9H11IN2
Structure:
Chemical Name:
6-chloro-5-iodonicotinic acid
CAS:
59782-87-5
MF:
C6H3ClINO2
Structure:
Chemical Name:
6-BROMO-2-PYRIDINEMETHANAMINE
CAS:
188637-63-0
MF:
C6H7BrN2
Structure:
Chemical Name:
6-(DIMETHYLAMINO)NICOTINIC ACID
CAS:
82846-28-4
MF:
C8H10N2O2
Structure:
Chemical Name:
4-Amino-2-chloro-6-(trifluoromethyl)pyridine
CAS:
34486-22-1
MF:
C6H4ClF3N2
Structure:
Chemical Name:
IMidazo[1,2-a]pyridine-3-carboxylic acid, 6-chloro-
CAS:
138642-97-4
MF:
C8H5ClN2O2
Structure:
Chemical Name:
2-BROMONICOTINAMIDE
CAS:
87674-18-8
MF:
C6H5BrN2O
Structure:
Chemical Name:
4-BOC-1-(5-BROMO-2-PYRIDYL)PIPERAZINE
CAS:
153747-97-8
MF:
C14H20BrN3O2
Structure:
Chemical Name:
2 6-DIMETHOXYPYRIDINE-3-CARBOXALDEHYDE&
CAS:
58819-72-0
MF:
C8H9NO3
Structure:
Chemical Name:
PYRIDINE-4-BORONIC ACID HYDROCHLORIDE
CAS:
913835-65-1
MF:
C5H7BClNO2
Structure:
Chemical Name:
3-FORMYL-2-PYRIDINECARBONITRILE
CAS:
131747-66-5
MF:
C7H4N2O
Structure:
Chemical Name:
4,4'-DIPYRIDYL DIHYDROCHLORIDE
CAS:
27926-72-3
MF:
C10H10Cl2N2
Structure:
Chemical Name:
N-HEXYLPYRIDINIUM BROMIDE
CAS:
74440-81-6
MF:
C11H18BrN
Structure:
Chemical Name:
4-Chloro-pyridine-2-carbonyl chloride
CAS:
53750-66-6
MF:
C6H3Cl2NO
Structure:
Chemical Name:
1H-Pyrrolo[2,3-b]pyridine, 3-methyl-, 7-oxide (9CI)
CAS:
688782-00-5
MF:
C8H8N2O
Structure:
Chemical Name:
6-CHLORO-4-(TRIFLUOROMETHYL)NICOTINICACID
CAS:
261635-77-2
MF:
C7H3ClF3NO2
Structure:
Chemical Name:
3-Bromo-5-(methylsulphonyl)pyridine 98%
CAS:
445491-71-4
MF:
C6H6BrNO2S
Structure:
Chemical Name:
2-Pyridinecarboxamide,5-fluoro-(9CI)
CAS:
499796-71-3
MF:
C6H5FN2O
Structure:
Chemical Name:
2(1H)-Pyridinone,6-(aminomethyl)-(9CI)
CAS:
131052-62-5
MF:
C6H8N2O
Structure:
Chemical Name:
4,6-DIMETHYLNICOTINIC ACID
CAS:
22047-86-5
MF:
C8H9NO2
Structure:
Chemical Name:
Ethyl 8-bromo-6-methylimidazo[1,2-a]pyridine-2-carboxylate
CAS:
847446-55-3
MF:
C11H11BrN2O2
Structure:
Chemical Name:
2,6-DIMETHYLPYRIDINE-4-CARBOXYLIC ACID METHYL ESTER
CAS:
142896-15-9
MF:
C9H11NO2
Structure:
Chemical Name:
6-BROMO-IMIDAZO[1,2-A]PYRIDINE-3-CARBONITRILE
CAS:
474708-98-0
MF:
C8H4BrN3
Structure:
Chemical Name:
1,2-Dihydro-2-oxo-6-(trifluoromethyl)-3-pyridinecarboxylic acid ethyl ester
CAS:
116548-02-8
MF:
C9H8F3NO3
Structure:
Chemical Name:
2-(2-BroMophenyl)pyridine
CAS:
109306-86-7
MF:
C11H8BrN
Structure:
Chemical Name:
NEOPYRITHIAMINE HYDROBROMIDE
CAS:
534-64-5
MF:
C14H20Br2N4O
Structure:
Chemical Name:
3-(Dimethylamino)-1-(pyridine-2-yl)prop-2-en-1-one
CAS:
66521-54-8
MF:
C10H12N2O
Structure:
Chemical Name:
2 6-DIPHENYLISONICOTINIC ACID 97
CAS:
38947-57-8
MF:
C18H13NO2
Structure:
Chemical Name:
1-(3-PYRIDINYL)-2-HYDROXYETHYLAMINE,
CAS:
372144-01-9
MF:
C7H10N2O
Structure:
Chemical Name:
2,4-Dihydroxypyridine
CAS:
84719-31-3
MF:
C5H5NO2
Structure:
Chemical Name:
2-BROMO-3-METHOXYPYRIDINE-4-CARBOXALDEHYDE
CAS:
191418-78-7
MF:
C7H6BrNO2
Structure:
Chemical Name:
6-HYDROXYMETHYL-PYRIDINE-2-CARBOXYLIC ACID
CAS:
1197-10-0
MF:
C7H7NO3
Structure:
Chemical Name:
Furo[2,3-b]pyridin-3-ol, 2,3-dihydro- (9CI)
CAS:
144186-57-2
MF:
C7H7NO2
Structure:
Chemical Name:
Pyridine, 5-bromo-2-(bromomethyl)- (9CI)
CAS:
145218-19-5
MF:
C6H5Br2N
Structure:
Chemical Name:
5,6,7,8-tetrahydro-2,6-naphthyridin-1-amine
CAS:
601515-40-6
MF:
C8H11N3
Structure:
Chemical Name:
Furo[3,2-b]pyridine-2-methanol(9CI)
CAS:
162537-61-3
MF:
C8H7NO2
Structure:
Chemical Name:
3-Pyridinamine,2,6-difluoro-(9CI)
CAS:
108118-69-0
MF:
C5H4F2N2
Structure:
Chemical Name:
2-PHENOXY ISONICOTINIC ACID
CAS:
51362-08-4
MF:
C12H9NO3
Structure:
Chemical Name:
2,4,6-TRIMETHYLPYRIDINE-3-BORONIC ACID
CAS:
1029654-17-8
MF:
C8H12BNO2
Structure:
Chemical Name:
3-AMINO-2-(4-FLUOROPHENOXY)PYRIDINE
CAS:
175135-64-5
MF:
C11H9FN2O
Structure:
Chemical Name:
1-PYRIDIN-3-YL-CYCLOPROPYLAMINE
CAS:
503417-38-7
MF:
C8H10N2
Structure:
Chemical Name:
5-BROMO-2,2'-DIETHOXY-4,5'-BIPYRIDINE
CAS:
871269-04-4
MF:
C14H15BrN2O2
Structure:
Chemical Name:
2-BROMO-3-METHYLPYRIDINE-5-BORONIC ACID PINACOL ESTER
CAS:
1256360-64-1
MF:
C12H17BBrNO2
Structure:
Chemical Name:
4-Amino-3-ethylbenzoic acid
CAS:
51688-75-6
MF:
C9H11NO2
Structure:
Chemical Name:
2-CHLORO-5-PHENYLPYRIDINE-3-CARBOXALDEH&
CAS:
176433-57-1
MF:
C12H8ClNO
Structure:
Chemical Name:
Carbamic acid, (3-amino-4-pyridinyl)-, 1,1-dimethylethyl ester (9CI)
CAS:
183311-28-6
MF:
C10H15N3O2
Structure:
Chemical Name:
Pyridine, 2-fluoro-5-methoxy- (9CI)
CAS:
136888-79-4
MF:
C6H6FNO
Structure:
Chemical Name:
2-METHOXY-4,6-DIMETHYLNICOTINONITRILE
CAS:
65515-39-1
MF:
C9H10N2O
Structure:
Chemical Name:
2,6,7-Trichloro-3-(trifluoromethyl)quinoxaline
CAS:
281209-13-0
MF:
C9H2Cl3F3N2
Structure:
Chemical Name:
2-Pyridinemethanamine,5-fluoro-(9CI)
CAS:
561297-96-9
MF:
C6H7FN2
Structure:
Chemical Name:
2-Pyridinecarboxylicacid,5-nitro-,ethylester(9CI)
CAS:
30563-98-5
MF:
C8H8N2O4
Structure:
Chemical Name:
2-(TRIFLUOROACETOXY)PYRIDINE
CAS:
96254-05-6
MF:
C7H4F3NO2
Structure:
Chemical Name:
4-TRIFLUOROMETHYL-3-FORMYLPYRIDINE
CAS:
872626-76-1
MF:
C7H4F3NO
Structure:
Chemical Name:
6-(2-THIENYL)-2-PYRIDINECARBOXALDEHYDE
CAS:
208111-00-6
MF:
C10H7NOS
Structure:
Chemical Name:
6-SULFONICOTINIC ACID
CAS:
17624-03-2
MF:
C6H5NO5S
Structure:
Chemical Name:
2,2'-Dipyridyl N-oxide
CAS:
33421-43-1
MF:
C10H8N2O
Structure:
Chemical Name:
5-CYANO-2-IODOPYRIDINE
CAS:
289470-22-0
MF:
C6H3IN2
Structure:
Chemical Name:
Acetic acid, (2-pyridinylthio)-, ethyl ester (9CI)
CAS:
28856-92-0
MF:
C9H11NO2S
Structure:
Chemical Name:
Pyridine, 3-bromo-5-(bromomethyl)- (9CI)
CAS:
145743-85-7
MF:
C6H5Br2N
Structure:
Chemical Name:
Pyridine, 2-bromo-5-(chloromethyl)- (9CI)
CAS:
168173-56-6
MF:
C6H5BrClN
Structure:
Chemical Name:
4-Amino-5-chloronicotinic acid
CAS:
52834-09-0
MF:
C6H5ClN2O2
Structure:
Chemical Name:
2-Cyanopyridine-3-boronic acid neopentyl glycol ester
CAS:
868944-75-6
MF:
C11H13BN2O2
Structure:
Chemical Name:
2-Pyridinecarboxylicacid,4-cyano-(9CI)
CAS:
640296-19-1
MF:
C7H4N2O2
Structure:
Chemical Name:
Furo[3,2-b]pyridin-3(2H)-one,2-methyl-(9CI)
CAS:
107096-03-7
MF:
C8H7NO2
Structure:
Chemical Name:
7(6H)-Isoquinolinone,5,8-dihydro-(9CI)
CAS:
228271-52-1
MF:
C9H9NO
Structure:
Chemical Name:
2(1H)-Pyridinone,5-fluoro-,hydrazone(9CI)
CAS:
145934-90-3
MF:
C5H6FN3
Structure:
Chemical Name:
3-Pyridineethanimidamide(9CI)
CAS:
474310-74-2
MF:
C7H9N3
Structure:
Chemical Name:
2-phenoxypyridin-3-amine
CAS:
28664-62-2
MF:
C11H10N2O
Structure:
Chemical Name:
2-Pyridinecarboxylic acid,3-chloro-5-(trifluoromethyl)-,methyl ester
CAS:
655235-65-7
MF:
C8H5ClF3NO2
Structure:
Chemical Name:
2-(1,1-Diethoxymethyl)pyridine-3-boronic acid pinacol ester
CAS:
1218790-41-0
MF:
C16H26BNO4
Structure:
Chemical Name:
1-(1-ADAMANTYL)PYRIDINIUM BROMIDE
CAS:
19984-57-7
MF:
C15H20BrN
Structure:
Chemical Name:
6-METHYLPYRIDINE-2-SULFONIC ACID
CAS:
18615-99-1
MF:
C6H7NO3S
Structure:
Chemical Name:
(4-METHYLPYRIDIN-3-YL)METHYLAMINE
CAS:
1443-42-1
MF:
C7H10N2
Structure:
Chemical Name:
2-NITRONICOTINIC ACID
CAS:
33225-72-8
MF:
C6H4N2O4
Structure:
Chemical Name:
5-(METHYLTHIO)PYRIDIN-3-YLTHIOMETHYLBORONIC ACID 95
CAS:
913835-66-2
MF:
C7H10BNO2S2
Structure:
Chemical Name:
2-CHLORO-5-IODONICOTINIC ACID
CAS:
59782-86-4
MF:
C6H3ClINO2
Structure:
Chemical Name:
3-BROMOMETHYL-PYRIDINE-2-CARBONITRILE
CAS:
116986-13-1
MF:
C7H5BrN2
Structure:
Chemical Name:
3-Bromo-2,5-lutidine
CAS:
17117-19-0
MF:
C7H8BrN