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2402-79-1

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2402-79-1 Usage

General Description

2,3,5,6-Tetrachloropyridine is a chemical compound that is derived from pyridine, a heterocyclic organic compound. It is a yellow to brown liquid with a strong, unpleasant odor. It is mainly used as an intermediate in the production of agrochemicals, pharmaceuticals, and other organic compounds. 2,3,5,6-Tetrachloropyridine is known to be toxic and harmful to human health, as it can cause irritation to the skin and eyes, and can be harmful if swallowed or inhaled. It is also harmful to aquatic organisms and can persist in the environment for a long time. Therefore, proper handling and disposal of this chemical is essential to minimize its impact on human health and the environment.

Check Digit Verification of cas no

The CAS Registry Mumber 2402-79-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,0 and 2 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2402-79:
(6*2)+(5*4)+(4*0)+(3*2)+(2*7)+(1*9)=61
61 % 10 = 1
So 2402-79-1 is a valid CAS Registry Number.
InChI:InChI=1/C5HCl4N/c6-2-1-3(7)5(9)10-4(2)8/h1H

2402-79-1 Well-known Company Product Price

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  • Alfa Aesar

  • (L19458)  2,3,5,6-Tetrachloropyridine, 98%   

  • 2402-79-1

  • 1g

  • 277.0CNY

  • Detail
  • Alfa Aesar

  • (L19458)  2,3,5,6-Tetrachloropyridine, 98%   

  • 2402-79-1

  • 5g

  • 890.0CNY

  • Detail
  • Alfa Aesar

  • (L19458)  2,3,5,6-Tetrachloropyridine, 98%   

  • 2402-79-1

  • 25g

  • 3426.0CNY

  • Detail

2402-79-1SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name 2,3,5,6-Tetrachloropyridine

1.2 Other means of identification

Product number -
Other names 2,3,5,6-tetrachlorpyridine

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Intermediates
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:2402-79-1 SDS

2402-79-1Synthetic route

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
Stage #1: 2,3,4,5,6-pentachloropyridine With manganese; ammonium acetate In ethanol; water at 40℃; for 6h;
Stage #2: With ammonia In ethanol; water at 65℃; for 1h; pH=8 - 9; Concentration; Temperature;
99.5%
With ammonium chloride; zinc In acetonitrile at 80℃; for 3h; Reagent/catalyst; Solvent; Temperature; Green chemistry;88.4%
With ammonium chloride; dimethyl methane phosphonate; zinc In water for 0.5h; Yield given;
Pentafluoropyridine
700-16-3

Pentafluoropyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With hydrogen; potassium carbonate at 200℃; under 15001.5 Torr; for 2h; Autoclave;99.2%
2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

A

2,3,6-trichloropyridine
6515-09-9

2,3,6-trichloropyridine

B

2,3,5-trichloropyridine
16063-70-0

2,3,5-trichloropyridine

C

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With ammonium chloride; dimethyl methane phosphonate; zinc In water at 85 - 90℃; Product distribution; other ammonium salts; other methylphosphonates/phosphates;A 0.9%
B 1%
C 97.6%
tetrachloro-4-iodopyridine
30332-35-5

tetrachloro-4-iodopyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
In diethyl ether for 19h; Irradiation;87%
Multi-step reaction with 2 steps
1: 4 percent / copper bronze / dimethylformamide / 150 °C
2: 3 percent Chromat. / copper bronze / dimethylformamide / 20 h / 150 °C
View Scheme
methyl 4-cyano-2,2,4-trichlorobutyrate
41797-97-1

methyl 4-cyano-2,2,4-trichlorobutyrate

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
79%
tetrachloro-4-pyridylcopper
27425-94-1

tetrachloro-4-pyridylcopper

benzoyl chloride
98-88-4

benzoyl chloride

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

4-benzoyltetrachloropyridine
18613-89-3

4-benzoyltetrachloropyridine

Conditions
ConditionsYield
In N,N-dimethyl-formamide for 0.5h; Heating;A 9%
B 72%
4-Bromo-2,3,5,6-tetrachloropyridine
23995-94-0

4-Bromo-2,3,5,6-tetrachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,6-Tetrachloropyridine
14121-36-9

2,3,4,6-Tetrachloropyridine

C

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

D

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With Isopropylbenzene; copper In N,N-dimethyl-formamide at 150℃; for 1h; Further byproducts given;A 63%
B 15%
C 16%
D 17%
4-Bromo-2,3,5,6-tetrachloropyridine
23995-94-0

4-Bromo-2,3,5,6-tetrachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,6-Tetrachloropyridine
14121-36-9

2,3,4,6-Tetrachloropyridine

C

octachloro-3,4'-bipyridyl

octachloro-3,4'-bipyridyl

D

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With copper; benzoyl chloride In N,N-dimethyl-formamide at 150℃; for 0.5h;A 61%
B 24%
C n/a
D 15%
tetrachloro-4-iodopyridine
30332-35-5

tetrachloro-4-iodopyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

C

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With copper In N,N-dimethyl-formamide at 150℃;A 22%
B 4%
C 52%
4-Bromo-2,3,5,6-tetrachloropyridine
23995-94-0

4-Bromo-2,3,5,6-tetrachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,6-Tetrachloropyridine
14121-36-9

2,3,4,6-Tetrachloropyridine

C

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

D

octachloro-3,4'-bipyridyl

octachloro-3,4'-bipyridyl

E

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With para-xylene; copper In N,N-dimethyl-formamide at 150℃; for 1h; Product distribution; Mechanism; the similar reaction without p-xylene; in presence cumene, benzoyl chloride instead p-xylene; other reagent (CuCl); other polychloroiodoarenes; tetrahalohenopyridylcopper intermediate; evidence against free radical or pyridyne intermediates;A 42%
B 5%
C 15%
D 4%
E 18%
4-Bromo-2,3,5,6-tetrachloropyridine
23995-94-0

4-Bromo-2,3,5,6-tetrachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

C

octachloro-3,4'-bipyridyl

octachloro-3,4'-bipyridyl

D

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With para-xylene; copper In N,N-dimethyl-formamide at 150℃; for 1h; Further byproducts given;A 42%
B 15%
C 4%
D 18%
With copper In N,N-dimethyl-formamide at 150℃; for 0.5h;A 17%
B 21%
C 8%
D 14%
With copper In N,N-dimethyl-formamide at 150℃; for 0.5h; Further byproducts given;A 10%
B 10%
C 9%
D 8%
4-Bromo-2,3,5,6-tetrachloropyridine
23995-94-0

4-Bromo-2,3,5,6-tetrachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

4-bromo-2,3,6-tetrachloropyridine
74894-06-7

4-bromo-2,3,6-tetrachloropyridine

Conditions
ConditionsYield
In diethyl ether for 71h; Irradiation;A 17%
B 6%
tetrachloro-4-pyridylcopper
27425-94-1

tetrachloro-4-pyridylcopper

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
In N,N-dimethyl-formamide for 1h; Heating;A 13.5%
B 1%
tetrachloro-4-pyridylcopper
27425-94-1

tetrachloro-4-pyridylcopper

benzoyl chloride
98-88-4

benzoyl chloride

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

4-benzoyltetrachloropyridine
18613-89-3

4-benzoyltetrachloropyridine

C

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

D

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With para-xylene In N,N-dimethyl-formamide for 23h; Product distribution; Mechanism; Heating; the similar reaction without p-xylene; other reaction times; similar range of products to those obtained from 4-bromotetrachloropyridine;A 12%
B 13%
C 1%
D 2.5%
tetrachloro-4-pyridylcopper
27425-94-1

tetrachloro-4-pyridylcopper

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

4-benzoyltetrachloropyridine
18613-89-3

4-benzoyltetrachloropyridine

C

2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

D

octachloro-4,4'-bipyridyl
18725-60-5

octachloro-4,4'-bipyridyl

Conditions
ConditionsYield
With para-xylene; benzoyl chloride In N,N-dimethyl-formamide for 23h; Heating;A 12%
B 13%
C 1%
D 2.5%
pyridine
110-86-1

pyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With phosphorus pentachloride at 210 - 220℃;
With sulfur dichloride In tetrachloromethane at 0 - 80℃; for 6h; Temperature; Solvent; Inert atmosphere;
3,5,6-trichloropyridin-2 ol
6515-38-4

3,5,6-trichloropyridin-2 ol

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With phosphorus pentachloride; trichlorophosphate at 180℃;
tetrachloroisonicotic acid
19340-26-2

tetrachloroisonicotic acid

glycerol
56-81-5

glycerol

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
bei der Destillation; unter Kohlendioxyd-Entwicklung;
tetrachloroisonicotic acid
19340-26-2

tetrachloroisonicotic acid

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With water at 180℃;
With glycerol beim Destillieren;
2,6-diamino-3,5-dichloropyridine
76942-19-3

2,6-diamino-3,5-dichloropyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With hydrogenchloride; sodium nitrite Yield given;
2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

N,N-dimethyl-formamide
68-12-2, 33513-42-7

N,N-dimethyl-formamide

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,6-Tetrachloropyridine
14121-36-9

2,3,4,6-Tetrachloropyridine

C

2,3,4,5-tetrachloro-pyridine
2808-86-8

2,3,4,5-tetrachloro-pyridine

D

tetrachloro-4-dimethylaminopyridine
19942-44-0

tetrachloro-4-dimethylaminopyridine

Conditions
ConditionsYield
With copper In N,N-dimethyl-formamide at 150℃; for 20h;A 3 % Chromat.
B 22 % Chromat.
C 2 % Chromat.
D 13 % Chromat.
2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,4,6-Tetrachloropyridine
14121-36-9

2,3,4,6-Tetrachloropyridine

C

2,3,4,5-tetrachloro-pyridine
2808-86-8

2,3,4,5-tetrachloro-pyridine

D

tetrachloro-4-dimethylaminopyridine
19942-44-0

tetrachloro-4-dimethylaminopyridine

Conditions
ConditionsYield
With copper In N,N-dimethyl-formamide at 150℃; for 20h;A 3 % Chromat.
B 22 % Chromat.
C 2 % Chromat.
D 13 % Chromat.
2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

bis(tetrachloropyridyl)mercury
20543-31-1

bis(tetrachloropyridyl)mercury

Conditions
ConditionsYield
In N,N-dimethyl-formamide Hg cathode, -1.40 V (S.C.E.), Et4NBF4;A 0.66 g
B 0.59 g
2,3,4,5,6-pentachloropyridine
2176-62-7

2,3,4,5,6-pentachloropyridine

A

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

B

2,3,5,6,2',3',6'-heptachloro-[4,4']bipyridinyl
36277-69-7

2,3,5,6,2',3',6'-heptachloro-[4,4']bipyridinyl

Conditions
ConditionsYield
With carbon dioxide 1.) Hg cathode, DMF, Et4NBF4, -1.30 V (S.C.E.), 2.) 150 deg C, vacuum; Multistep reaction;
tetrachloroisonicotic acid
19340-26-2

tetrachloroisonicotic acid

water
7732-18-5

water

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
at 180℃; im Rohr;
2,3,5-trichloropyridine
16063-70-0

2,3,5-trichloropyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With sodium hydroxide; hexachloroethane; tetrabutylammomium bromide at 50℃; for 4h;
1-(4-dimethylamino)-[2,3,5,6-tetrachloro-pyridin-4-yl]pyridinium chloride

1-(4-dimethylamino)-[2,3,5,6-tetrachloro-pyridin-4-yl]pyridinium chloride

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
With sodium tetrahydroborate In isopropyl alcohol at 20℃; for 6h;
2,6-Diaminopyridine
141-86-6

2,6-Diaminopyridine

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 60 percent / aq. HCl, H2O2
2: NaNO2-HCl
View Scheme
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

2,3,5-trichloropyridine
16063-70-0

2,3,5-trichloropyridine

Conditions
ConditionsYield
With 5%-palladium/activated carbon; hydrogen; potassium hydroxide In 5,5-dimethyl-1,3-cyclohexadiene; water at 60℃; under 4500.45 Torr; for 6h; Reagent/catalyst; Solvent; Pressure; Autoclave;99.1%
With sodium hydroxide In benzene
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-pyrrolidin-1-ylpyridine
2456-81-7

4-pyrrolidin-1-ylpyridine

1,1'-bis[4-pyrrolidino-(3,5-dichloro-pyridine-2,6-diyl)pyridinium]dichloride

1,1'-bis[4-pyrrolidino-(3,5-dichloro-pyridine-2,6-diyl)pyridinium]dichloride

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 120℃; for 3h;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

(4-methoxystyrene)boronic acid
214907-25-2

(4-methoxystyrene)boronic acid

2,3,5,6-tetrakis(4-methoxystyryl)pyridine

2,3,5,6-tetrakis(4-methoxystyryl)pyridine

Conditions
ConditionsYield
With potassium phosphate; di-(1-adamantyl)-n-butylphosphine; bis(dibenzylideneacetone)-palladium(0) In 1,4-dioxane at 100℃; for 20h; Suzuki-Miyaura Coupling; Inert atmosphere;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-trifluoromethylstyrenylboronic acid
851660-03-2

4-trifluoromethylstyrenylboronic acid

2,3,5,6-tetrakis(4-trifluoromethylstyryl)pyridine

2,3,5,6-tetrakis(4-trifluoromethylstyryl)pyridine

Conditions
ConditionsYield
With potassium phosphate; di-(1-adamantyl)-n-butylphosphine; bis(dibenzylideneacetone)-palladium(0) In 1,4-dioxane at 100℃; for 20h; Suzuki-Miyaura Coupling; Inert atmosphere;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-methylstyrenylboronic acid
214907-11-6

4-methylstyrenylboronic acid

2,3,5,6-tetrakis(4-methylstyryl)pyridine

2,3,5,6-tetrakis(4-methylstyryl)pyridine

Conditions
ConditionsYield
With potassium phosphate; di-(1-adamantyl)-n-butylphosphine; bis(dibenzylideneacetone)-palladium(0) In 1,4-dioxane at 100℃; for 20h; Suzuki-Miyaura Coupling; Inert atmosphere;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

phenylboronic acid
98-80-6

phenylboronic acid

tetraphenyl-2,3,5,6 pyridine
24301-97-1

tetraphenyl-2,3,5,6 pyridine

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate In toluene at 100℃; for 22h; Reagent/catalyst; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-methoxyphenylboronic acid
5720-07-0

4-methoxyphenylboronic acid

2,3,5,6-tetrakis(4-methoxyphenyl)pyridine
54932-38-6

2,3,5,6-tetrakis(4-methoxyphenyl)pyridine

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube;99%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

ethyl 2-cyanoacetate
105-56-6

ethyl 2-cyanoacetate

ethyl 2-cyano-2-(3,5,6-trichloropyridin-2-yl)acetate

ethyl 2-cyano-2-(3,5,6-trichloropyridin-2-yl)acetate

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 50℃; for 1h;98%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

phenylacetylene
536-74-3

phenylacetylene

2,3,5,6-tetrakis(phenylethynyl)pyridine

2,3,5,6-tetrakis(phenylethynyl)pyridine

Conditions
ConditionsYield
Stage #1: 2,3,5,6-tetrachloropyridine With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; dichloro bis(acetonitrile) palladium(II); copper(l) iodide; diisopropylamine In 1,4-dioxane at 20℃; for 0.166667h; Inert atmosphere;
Stage #2: phenylacetylene In 1,4-dioxane at 90℃; for 20h;
96%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-methylphenylboronic acid
5720-05-8

4-methylphenylboronic acid

2,3,5,6-tetra-p-tolylpyridine
54932-37-5

2,3,5,6-tetra-p-tolylpyridine

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube;96%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

3,5,6-trichloro-2-hydrazinopyridine
55933-94-3

3,5,6-trichloro-2-hydrazinopyridine

Conditions
ConditionsYield
With hydrazine hydrate In methanol at 60 - 65℃; for 2h; Temperature; Green chemistry;96%
With sodium carbonate; hydrazine hydrate; butan-1-ol In water at 90 - 95℃;
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

1,1'-bis[4-dimethylamino-(3,5-dichloro-pyridine-2,6-diyl)pyridinium]dichloride

1,1'-bis[4-dimethylamino-(3,5-dichloro-pyridine-2,6-diyl)pyridinium]dichloride

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 120℃; for 3h;95%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

Dihydroxy-styryl-boran
4363-35-3, 6783-05-7, 60806-02-2

Dihydroxy-styryl-boran

2,3,5,6-tetrastyrylpyridine

2,3,5,6-tetrastyrylpyridine

Conditions
ConditionsYield
With potassium phosphate; di-(1-adamantyl)-n-butylphosphine; bis(dibenzylideneacetone)-palladium(0) In 1,4-dioxane at 100℃; for 20h; Reagent/catalyst; Solvent; Suzuki-Miyaura Coupling; Inert atmosphere;95%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

2,3,5,6-tetrafluoropyridine
2875-18-5

2,3,5,6-tetrafluoropyridine

Conditions
ConditionsYield
With potassium fluoride In sulfolane at 120℃; for 6h; Reagent/catalyst; Solvent; Green chemistry;95%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

(4-chloro-2-methoxyphenyl)boronic acid
762287-57-0

(4-chloro-2-methoxyphenyl)boronic acid

3,5-dichloro-2,6-bis-(4-chloro-2-methoxyphenyl)pyridine

3,5-dichloro-2,6-bis-(4-chloro-2-methoxyphenyl)pyridine

Conditions
ConditionsYield
With tetrakis(triphenylphosphine) palladium(0); sodium carbonate In 1,2-dimethoxyethane for 6h; Inert atmosphere; Reflux;95%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

2-Methylphenylboronic acid
16419-60-6

2-Methylphenylboronic acid

3,5-dichloro-2,6-di-o-tolylpyridine

3,5-dichloro-2,6-di-o-tolylpyridine

Conditions
ConditionsYield
With potassium fluoride; tetrakis(triphenylphosphine) palladium(0) In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere;95%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-ethylphenylboronic acid
63139-21-9

4-ethylphenylboronic acid

2,3,5,6-tetrakis(4-ethylphenyl)pyridine

2,3,5,6-tetrakis(4-ethylphenyl)pyridine

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube;94%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

butoxyethyl glycolate

butoxyethyl glycolate

butoxyethyl ester of [(3,5,6-trichloro-2-pyridyl)oxy]acetic acid

butoxyethyl ester of [(3,5,6-trichloro-2-pyridyl)oxy]acetic acid

Conditions
ConditionsYield
With N-benzyl-N,N,N-triethylammonium chloride; potassium carbonate In tetrahydrofuran for 5h; Reagent/catalyst; Solvent; Reflux;94%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-methoxyphenylacetylen
768-60-5

4-methoxyphenylacetylen

2,3,5,6-tetrakis-((4-methoxyphenyl)ethynyl)pyridine

2,3,5,6-tetrakis-((4-methoxyphenyl)ethynyl)pyridine

Conditions
ConditionsYield
Stage #1: 2,3,5,6-tetrachloropyridine With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; dichloro bis(acetonitrile) palladium(II); copper(l) iodide; diisopropylamine In 1,4-dioxane at 20℃; for 0.166667h; Inert atmosphere;
Stage #2: 4-methoxyphenylacetylen In 1,4-dioxane at 90℃; for 20h;
93%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

naphthalene-2-boronic acid
32316-92-0

naphthalene-2-boronic acid

3,5-dichloro-2,6-di(naphthalen-2-yl)pyridine

3,5-dichloro-2,6-di(naphthalen-2-yl)pyridine

Conditions
ConditionsYield
With potassium fluoride; tetrakis(triphenylphosphine) palladium(0) In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere;91%
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In water; acetonitrile for 4h; Inert atmosphere; Reflux;
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In water; acetonitrile for 4h; Inert atmosphere; Reflux;
Thien-3-ylboronic acid
6165-69-1

Thien-3-ylboronic acid

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

3,5-dichloro-2,6-di(thiophen-3-yl)pyridine

3,5-dichloro-2,6-di(thiophen-3-yl)pyridine

Conditions
ConditionsYield
With potassium fluoride; tetrakis(triphenylphosphine) palladium(0) In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere;91%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

phenylboronic acid
98-80-6

phenylboronic acid

3,5-dichloro-2,6-bisphenylpyridine

3,5-dichloro-2,6-bisphenylpyridine

Conditions
ConditionsYield
With potassium fluoride; tetrakis(triphenylphosphine) palladium(0) In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere;90%
With potassium fluoride; tetrakis(triphenylphosphine) palladium(0) In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube; regioselective reaction;77%
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In water; acetonitrile for 4h; Inert atmosphere; Reflux;
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In water; acetonitrile for 4h; Reflux; Inert atmosphere;
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

4-tert-butylphenylboronic acid
123324-71-0

4-tert-butylphenylboronic acid

2,3,5,6-tetrakis(4-tert-butylphenyl)pyridine

2,3,5,6-tetrakis(4-tert-butylphenyl)pyridine

Conditions
ConditionsYield
With tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate In toluene at 100℃; for 22h; Suzuki-Miyaura Coupling; Inert atmosphere; Sealed tube;90%
2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

5'-tert-butyl-(1,1':3',1
1428946-28-4

5'-tert-butyl-(1,1':3',1"-terphenyl)-3,3"-diol

C54H42Cl4N2O4
1428946-32-0

C54H42Cl4N2O4

Conditions
ConditionsYield
With caesium carbonate In dimethyl sulfoxide at 120℃; for 0.5h; Inert atmosphere;89.4%
Methyl fluorosulfonate
421-20-5

Methyl fluorosulfonate

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

3,5,6-trichloro-1-methyl-2-pyridone
75348-52-6

3,5,6-trichloro-1-methyl-2-pyridone

Conditions
ConditionsYield
for 0.5h; Heating;89%
1-ethynyl-4-fluorobenzene
766-98-3

1-ethynyl-4-fluorobenzene

2,3,5,6-tetrachloropyridine
2402-79-1

2,3,5,6-tetrachloropyridine

3,5-dichloro-2,6-bis((4-fluorophenyl)ethynyl)pyridine

3,5-dichloro-2,6-bis((4-fluorophenyl)ethynyl)pyridine

Conditions
ConditionsYield
With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); diisopropylamine In 1,4-dioxane at 90℃; for 20h; Sonogashira Cross-Coupling; Inert atmosphere; Sealed tube; regioselective reaction;89%
Stage #1: 2,3,5,6-tetrachloropyridine With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane at 20℃; for 0.166667h; Sonogashira Cross-Coupling; Inert atmosphere;
Stage #2: 1-ethynyl-4-fluorobenzene In 1,4-dioxane at 90℃; for 20h; Sonogashira Cross-Coupling; Inert atmosphere;
68%

2402-79-1Relevant articles and documents

-

Chambers et al.

, p. 1917 (1979)

-

Facile preparation of Mn3O4 hollow microspheres via reduction of pentachloropyridine and their performance in lithium-ion batteries

Jiang, Zhan,Huang, Kaihua,Yang, Dian,Wang, Shuai,Zhong, Hong,Jiang, Chongwen

, p. 8264 - 8271 (2017)

Mn3O4 hollow microspheres have been facilely prepared via a green synthesis of 2,3,5,6-tetrachloropyridine reduced from pentachloropyridine by manganese. The specific hollow microspheres were made by a H2 gas bubble-templating method presenting a high specific surface area (87.1 m2 g-1) and a big total pore volume (0.2030 cm3 g-1). The Mn3O4 hollow microspheres as an anode material demonstrate a good electrochemical performance, with a high reversible capacity of 646.9 mA h g-1 after 240 cycles at a current density of 200 mA g-1. The good cycling performance is attributed to numerous mesopores, high specific surface area and big total pore volume, which can offer good electrical contact and conductivity as well as accommodate the mechanism strains. In addition, the yield and selectivity of 2,3,5,6-tetrachloropyridine achieved up to 99.2% and 99.5%, respectively.

Preparation method of 3,5-difluoro-2,6-diaminopyridine

-

Paragraph 0009-0012, (2019/02/04)

The invention discloses a preparation method of 3,5-difluoro-2,6-diaminopyridine, and belongs to the technical field of preparation methods of chemical drug intermediates. 2,3,4,5,6-pentachloropyridine is utilized as a raw material; and the 3,5-difluoro-2,6-diaminopyridine is prepared through reduction by a metallic reducing agent, fluorination and aminolysis. The method provided by the inventionis simple to operate, short in reaction time, environmentally friendly in process route and higher in yield, and has higher industrialization value; and an economical and high-efficiency catalyst is adopted.

Preparation method of 2,3,5,6-tetrachloropyridine

-

Paragraph 0021-0023; 0026; 0029; 0031; 0033, (2018/03/25)

The invention discloses a preparation method of 2,3,5,6-tetrachloropyridine and belongs to the field of chemical industry. The preparation method comprises: introducing 2-chloropyridine and chlorine gas as raw materials into a fixed-bed reactor loaded with an activated carbon catalyst, and generating 2,3,5,6-tetrachloropyridine under the action of the activated carbon catalyst. The catalyst uses one or more of AlCl3, NiCl2, CuCl2, ZnCl2, FeCl3, CaCl2, BaCl2, MgCl2, CoCl2 and LaCl2 as active components and activated carbon as a support; the active components in the catalyst account for 4-27% bymass, and the activated carbon accounts for 73-96% by mass; the catalyst uses 2-chloropyridine and chlorine gas as raw materials, and the 2-chloropyridine and chlorine gas is generated under the action of the catalyst that is nontoxic and harmless; the preparation method has high conversion rate, good selectivity and zero pollution.

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