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23056-36-2

Basic Information
CAS No.: 23056-36-2
Name: 2-Chloro-4-nitropyridine
Article Data: 5
Molecular Structure:
Molecular Structure of 23056-36-2 (2-Chloro-4-nitropyridine)
Formula: C5H3ClN2O2
Molecular Weight: 158.544
Synonyms: 2-Chlor-4-nitropyridin;pyridine, 2-chloro-4-nitro-;
EINECS: -0
Density: 1.489 g/cm3
Melting Point: 52-56 °C
Boiling Point: 258.4 °C at 760 mmHg
Flash Point: 110.1 °C
Appearance: Light yellow powder
Hazard Symbols: HarmfulXn, IrritantXi
Risk Codes: 20/21/22-36/37/38
Safety: 26-36
PSA: 58.71000
LogP: 2.16640
Synthetic route
14432-16-7

2-chloro-4-nitropyridine-N-oxide

23056-36-2

2-chloro-4-nitropyridine

Conditions
ConditionsYield
With phosphorus trichloride In dichloromethaneu for 4h; Reflux;88%
With phosphorus trichloride In chloroform at 20℃; Heating / reflux;78%
With ethyl acetate; phosphorus trichloride
1124-33-0

4-nitraminopyridine N-oxide

POCl3/PCl5

POCl3/PCl5

23056-36-2

2-chloro-4-nitropyridine

Conditions
ConditionsYield
60%
109-09-1

2-chloropyridine

23056-36-2

2-chloro-4-nitropyridine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: peroxyacetic acid; acetic acid
2: concentrated sulfuric acid; nitric acid
3: phosphorus (III)-chloride; ethyl acetate
View Scheme
2402-95-1

2-chloropyridine-N-oxide

23056-36-2

2-chloro-4-nitropyridine

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: concentrated sulfuric acid; nitric acid
2: phosphorus (III)-chloride; ethyl acetate
View Scheme
23056-36-2

2-chloro-4-nitropyridine

109-86-4

2-methoxy-ethanol

1067914-32-2

2-chloro-4-(2-methoxyethoxy)pyridine

Conditions
ConditionsYield
With potassium tert-butylate at 0 - 20℃; for 16.5h;100%
With sodium hydride In tetrahydrofuran at 0 - 25℃; for 10h;98%
With potassium tert-butylate at 0 - 20℃; for 2h;97%
23056-36-2

2-chloro-4-nitropyridine

670-95-1

4-Phenylimidazole

1244039-73-3

C14H10ClN3

Conditions
ConditionsYield
Stage #1: 4-Phenylimidazole With sodium hydride In N,N-dimethyl-formamide; mineral oil at 20℃; for 0.25h;
Stage #2: 2-chloro-4-nitropyridine In N,N-dimethyl-formamide; mineral oil at 20℃; for 0.166667h;
100%
23056-36-2

2-chloro-4-nitropyridine

7417-21-2

2-(3,4-dimethoxyphenyl)ethyl alcohol

1185999-53-4

2-chloro-4-(2-(3,4-dimethoxyphenyl)ethoxy)pyridine

Conditions
ConditionsYield
With sodium hydride In paraffin oil (nujol); N,N-dimethyl-formamide at 0 - 20℃; for 1h;100%
23056-36-2

2-chloro-4-nitropyridine

14704-41-7

3,5-bis(trifluoromethyl)pyrazole

5-[3,5-bis(trifluoromethyl)-1H-pyrazol-1-yl]-2-nitropyridine

Conditions
ConditionsYield
In N-methyl-acetamide; hexane; ethyl acetate99%
23056-36-2

2-chloro-4-nitropyridine

97674-02-7

tributyl(1-ethoxyvinyl)stannane

C7H6N2O3

Conditions
ConditionsYield
Stage #1: 2-chloro-4-nitropyridine; tributyl(1-ethoxyvinyl)stannane With bis-triphenylphosphine-palladium(II) chloride In N,N-dimethyl-formamide at 85℃; for 3h; Inert atmosphere;
Stage #2: With hydrogenchloride In water at 20℃; Solvent; Temperature; Reagent/catalyst;
99%
23056-36-2

2-chloro-4-nitropyridine

14432-12-3

4-Amino-2-chloropyridine

Conditions
ConditionsYield
With titanium for 0.25h;98%
With zinc borohydride pyridine complex In tetrahydrofuran for 2h; Heating;96%
With C36H56Cl3CrN2O; magnesium; 4,4,5,5-tetramethyl-[1,3,2]-dioxaboralane In tetrahydrofuran at 60℃; for 24h; Inert atmosphere; chemoselective reaction;95%
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Chemistry

Molecular Structure of 2-Chloro-4-nitropyridine (CAS NO.23056-36-2):

Molecular formula: C5H3ClN2O2.
Molecular Weight: 158.54
H bond acceptors: 4
H bond donors: 0
Freely Rotating Bonds: 1
Polar Surface Area: 58.71 Å2
Index of Refraction: 1.587
Molar Refractivity: 35.78 cm3
Molar Volume: 106.4 cm3
Surface Tension: 57.2 dyne/cm
Density: 1.489 g/cm3
Flash Point: 110.1 °C
Enthalpy of Vaporization: 47.6 kJ/mol
Boiling Point: 258.4 °C at 760 mmHg
Vapour Pressure: 0.0222 mmHg at 25°C
Melting point: 52-56 °C
Product Categories: Pyridine; Pyridines; Pyridine Derivertives; C5Heterocyclic Building Blocks; Halogenated Heterocycles; Heterocyclic Building Blocks

Safety Profile

Hazard Codes: HarmfulXn,IrritantXi
Risk Statements: 20/21/22-36/37/38
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
WGK Germany: 3
HazardClass: Irritant
PackingGroup: III

Specification

  2-Chloro-4-nitropyridine , with CAS number of 23056-36-2, can be called pyridine, 2-chloro-4-nitro- ; 2-Chlor-4-nitropyridin . It is a light yellow powder, 2-Chloro-4-nitropyridine (CAS NO.23056-36-2) is used as intermediates in fields of medicine, materials of chemical industry and so on.