52092-47-4

Basic information

• Product Name: 5-Chloro-2-nitropyridine
• Synonyms: 5-CHLORO-2-NITROPYRIDINE;3-Chloro-6-nitropyridine;5-CHLORO-2-NITROPYRIDINE/2-NITRO-5-CHLOROPYRIDINE;6-nitro-3-chloropyridine
• CAS NO: 52092-47-4
• Molecular Formula: C₅H₃ClN₂O₂
• Molecular Weight: 158.54
• EINECS: 1592732-453-0
• Product Categories: Pyridine;Pyridines;pyridine series;Building Blocks;C5;C5 to C6;Chemical Synthesis;Halogenated Heterocycles;Heterocyclic Building Blocks;Heterocycle-Pyridine series;Pyrazines
• Mol File: 52092-47-4.mol
• Article Data: 8

Chemical Properties

• Melting Point: 119-123℃
• Boiling Point: 275.3 °C at 760 mmHg
• Flash Point: 120.3 °C
• Appearance: /
• Density: 1.489 g/cm³
• Vapor Pressure: 0.00865mmHg at 25°C
• Refractive Index: 1.587
• Storage Temp.: Inert atmosphere,Room Temperature
• PKA: -4.87±0.22(Predicted)
• CAS DataBase Reference: 5-Chloro-2-nitropyridine(CAS DataBase Reference)
• NIST Chemistry Reference: 5-Chloro-2-nitropyridine(52092-47-4)
• EPA Substance Registry System: 5-Chloro-2-nitropyridine(52092-47-4)

Safety Data

• Hazard Codes: Xi,N,Xn
• Statements: 20/21/22-36/37/38-50-41-22
• Safety Statements: 26-36/37/39-36-61-37/39
• RIDADR: UN 2811 6.1/PG 3
• WGK Germany: 2
• Hazardous Substances Data: 52092-47-4(Hazardous Substances Data)

Usage

Uses

Used in Organic Synthesis:
5-Chloro-2-nitropyridine is used as an organic synthesis intermediate for the creation of a wide range of chemical compounds. Its unique structure allows for various functional group transformations, enabling the synthesis of complex molecules with diverse properties and applications.
Used in Pharmaceutical Intermediates:
In the pharmaceutical industry, 5-Chloro-2-nitropyridine is utilized as a key intermediate in the development of new drugs. Its reactivity and structural diversity make it an essential component in the design and synthesis of novel therapeutic agents, particularly those targeting specific biological pathways or receptors.
Used in Laboratory Research and Development:
5-Chloro-2-nitropyridine is also employed in laboratory research and development processes, where it is used to explore new reaction pathways, optimize synthetic routes, and develop innovative methodologies for the synthesis of complex organic and pharmaceutical compounds.
Used in Chemical Production Process:
In the chemical production process, 5-Chloro-2-nitropyridine plays a vital role in the large-scale synthesis of various organic and pharmaceutical compounds. Its use in this context helps to streamline the production process, improve yields, and enhance the overall efficiency of the manufacturing process.

Synthesis

To concentrated H2SO4 (50 ml) was added 30 % H2O2 (25mL) at 0 °C and a solution of 5-chloropyridin-2-amine (5.0 g, 39 mmol) in concentrated H2SO4 (20 mL) was added at 0 °C. The mixture was stirred for 20 hours at room temperature. The mixture was poured into ice water under vigorously stirring and the resulting solid was filtered. The solid was recrystallized from ethanol to give 5-chloro-2-nitropyridine. 5-chloro-2-nitropyridine. MS m/z 159 (M+ 1)+.

InChI:InChI=1/C5H3ClN2O2/c6-4-1-2-5(7-3-4)8(9)10/h1-3H

Synthetic route

5-chloro-2-pyridylamine (1072-98-6) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
With sulfuric acid; dihydrogen peroxide at 20℃; for 48h;	71%
With caro's acid
Multi-step reaction with 2 steps 1: 94 percent / trifluoroacetic anhydride / CH2Cl2 / -60 °C 2: 62 percent / trifluoroacetic acid, H2O2 / CH2Cl2 / 1.5 h / 0 °C View Scheme

2-dimethylsulfilimino-5-chloropyridine (134251-85-7) → 5-chloro-2-nitropyridine (52092-47-4) + 5-Chloro-2-nitro-pyridine 1-oxide (134251-87-9)

Conditions	Yield
With dihydrogen peroxide; trifluoroacetic acid In dichloromethane at 0℃; for 1.5h;	A 62% B 38%

(3-chloro-6-nitro-[2]pyridyl)-hydrazine (99848-04-1) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
With water; silver(I) acetate

3-hydroxy-2-nitropyridine (15128-82-2) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
Multi-step reaction with 4 steps 1: acetic acid anhydride; nitric acid 2: phosphorus (V)-chloride / 130 °C 3: methanol; N2H4 4: silver acetate; water View Scheme
Multi-step reaction with 4 steps 1: acetic acid; acetic acid anhydride; nitric acid 2: phosphorus (V)-chloride / 130 °C 3: methanol; N2H4 4: silver acetate; water View Scheme

3-hydroxy-2,6-dinitropyridine (15128-91-3) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
Multi-step reaction with 3 steps 1: phosphorus (V)-chloride / 130 °C 2: methanol; N2H4 3: silver acetate; water View Scheme

3-chloro-2,6-dinitro-pyridine (101079-67-8) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
Multi-step reaction with 2 steps 1: methanol; N2H4 2: silver acetate; water View Scheme

5-chloro-2-pyridylamine (1072-98-6) + concentrated H2 SO4 + dihydrogen peroxide (7722-84-1) → 5-chloro-2-nitropyridine (52092-47-4)

Conditions	Yield
In ethyl acetate; toluene

methanol (67-56-1) + 5-chloro-2-nitropyridine (52092-47-4) + sodium methylate (124-41-4) → 3-methoxy-6-nitropyridine (126739-64-8)

Conditions	Yield
at 20℃;	100%

5-chloro-2-nitropyridine (52092-47-4) + p-cresol (106-44-5) → 2-nitro-5-(p-tolyloxy)pyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 100℃; for 12h;	94%

piperazine (110-85-0) + 5-chloro-2-nitropyridine (52092-47-4) → 1-(6-nitropyridin-3-yl)piperazine (775288-71-6)

Conditions	Yield
In butan-1-ol at 22 - 100℃;	89.5%
In isopropyl alcohol at 80 - 85℃; for 24h; Time;	102.2 g

5-chloro-2-nitropyridine (52092-47-4) + sodium phenyl-methanolate (20194-18-7) → 2-nitro-5-phenylmethoxypyridine

Conditions	Yield
In tetrahydrofuran at 20℃;	89.1%

5-chloro-2-nitropyridine (52092-47-4) + 4-Fluorophenol (371-41-5) → 5-(4-fluorophenoxy)-2-nitropyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 100℃; for 12h;	86%

5-chloro-2-nitropyridine (52092-47-4) + benzyl (3-fluoro-4-hydroxyphenyl)carbamate (1195781-15-7) → benzyl {3-fluoro-4-[(6-nitropyridin-3-yl)oxy]phenyl}carbamate (1195781-16-8)

Conditions	Yield
With caesium carbonate In dimethyl sulfoxide at 20℃; for 3h;	83%

piperazine (110-85-0) + 5-chloro-2-nitropyridine (52092-47-4) → 1-(6-nitropyridin-3-yl)piperazine hydrochloride (1221726-34-6)

Conditions	Yield
In butan-1-ol at 95℃; for 24h; Inert atmosphere;	82.3%

5-chloro-2-nitropyridine (52092-47-4) → 5-chloro-2-pyridylamine (1072-98-6)

Conditions	Yield
With sulfuric acid; hydrogen In ethanol at 25℃; Electrochemical reaction;	82%
With boron dimethyl-trifluoro sulphide In dichloromethane at 60℃; for 0.5h; Sealed tube;	72%
With hydrogenchloride; sodium hydrogensulfide
With hydrogenchloride; tin(ll) chloride
With ammonium hydroxide; iron(II) sulfate

5-chloro-2-nitropyridine (52092-47-4) + (S)-3-methyl-piperazine-1-carboxylic acid tert-butyl ester (147081-29-6) → (3S)-tert-butyl 3-methyl-4-(6-nitropyridin-3-yl)piperazine-1-carboxylate (1433849-53-6)

Conditions	Yield
With potassium phosphate; palladium diacetate; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl In 1,4-dioxane at 95 - 105℃; Inert atmosphere;	80.5%
With potassium phosphate; palladium diacetate; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl In toluene at 80 - 90℃; for 20h; Inert atmosphere; Industrial scale;

5-chloro-2-nitropyridine (52092-47-4) + N-(2-fluoro-5-hydroxyphenyl)-1,3-dimethyl-1H-pyrazole-5-carboxamide (1005788-04-4) → N-{2-fluoro-5-[(6-nitropyridin-3-yl)oxy]phenyl}-1,3-dimethyl-1H-pyrazole-5-carboxamide (1092394-02-9)

Conditions	Yield
With potassium carbonate In water; dimethyl sulfoxide at 75 - 85℃; for 6h; Large scale;	78%

5-chloro-2-nitropyridine (52092-47-4) + benzyl (2-fluoro-4-hydroxyphenyl)carbamate (1195781-24-8) → benzyl {2-fluoro-4-[(6-nitropyridin-3-yl)oxy]phenyl}carbamate (1195781-25-9)

Conditions	Yield
With caesium carbonate In dimethyl sulfoxide at 20℃; for 6h;	77%

5-chloro-2-nitropyridine (52092-47-4) + 4-bromo-phenol (106-41-2) → 5-(4-bromophenoxy)-2-nitropyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 100℃; for 12h;	77%

1-(1-methylethyl)piperazine (4318-42-7) + 5-chloro-2-nitropyridine (52092-47-4) → 1-isopropyl-4-(6-nitropyridin-3-yl)piperazine (943758-04-1)

Conditions	Yield
In acetonitrile for 5h; Reflux;	76%

5-chloro-2-nitropyridine (52092-47-4) + 5-hydroxy-2-fluoroaniline (62257-16-3) → 2-fluoro-5-(6-nitropyridin-3-yloxy)benzenamine (1020173-38-9)

Conditions	Yield
With potassium phosphate In water; dimethyl sulfoxide at 75 - 80℃; for 9h;	76%

3-HYDROXYPYRIDINE (109-00-2) + 5-chloro-2-nitropyridine (52092-47-4) → 2-nitro-5-(pyridine-3-yloxy)pyridine

Conditions	Yield
With caesium carbonate In N,N-dimethyl-formamide at 20℃; for 5h;	76%

5-chloro-2-nitropyridine (52092-47-4) + 3-monochlorophenol (108-43-0) → 5-(3-chlorophenoxy)-2-nitropyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 100℃; for 12h;	75%

1-methyl-piperazine (109-01-3) + 5-chloro-2-nitropyridine (52092-47-4) → 1-methyl-4-(6-nitro-pyridin-3-yl)-piperazine (657410-79-2)

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 70℃; for 3h;	75%

5-chloro-2-nitropyridine (52092-47-4) + 2,4,6,8-tetramethyl-2,4,6,8-tetravinyl-cyclotetrasiloxane (2554-06-5) → 2-nitro-5-vinylpyridine (125889-39-6)

Conditions	Yield
With XPhos; tetrabutyl ammonium fluoride; palladium diacetate In tetrahydrofuran at 67℃; for 24h; Inert atmosphere; Schlenk technique;	74%

5-chloro-2-nitropyridine (52092-47-4) + 1,3-dimethyl-1H-pyrazol-5-ol (5203-77-0) → 5-((1,3-dimethyl-1H-pyrazol-5-yl)oxy)-2-nitropyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 100℃; for 12h; Inert atmosphere;	71%

5-chloro-2-nitropyridine (52092-47-4) + 2-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-5,5-dimethyl-1,3,2-dioxaborinane (201733-56-4) → C10H15BN2O2

Conditions	Yield
Stage #1: 5-chloro-2-nitropyridine; 2-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-5,5-dimethyl-1,3,2-dioxaborinane With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium acetate In 1,4-dioxane at 80 - 90℃; Suzuki Coupling; Inert atmosphere; Stage #2: With hydrogen In 1,4-dioxane at 20℃; under 2280.15 Torr;	68%

4-HYDROXYPIPERIDINE (5382-16-1) + 5-chloro-2-nitropyridine (52092-47-4) → 1-(6-nitropyridin-3-yl)piperidin-4-ol

Conditions	Yield
With potassium carbonate In dimethyl sulfoxide at 90℃;	65%
With potassium carbonate In dimethyl sulfoxide at 90℃; Sealed tube;	65%

5-chloro-2-nitropyridine (52092-47-4) + phenylmethanethiol (100-53-8) → 5-(benzylthio)-2-nitropyridine

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 60℃; for 12h;	65%

5-chloro-2-nitropyridine (52092-47-4) + 1-t-Butoxycarbonylpiperazine (57260-71-6) → 4-(6-nitropyridin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (571189-16-7)

Conditions	Yield
With potassium carbonate In dimethyl sulfoxide at 100 - 110℃; Microwave irradiation;	63.81%
With cesium fluoride In dimethyl sulfoxide at 80℃; for 16h;	30.15%

5-chloro-2-nitropyridine (52092-47-4) + diethyl malonate (105-53-3) → diethyl 2-(6-nitro-3-pyridinyl)malonate

Conditions	Yield
Stage #1: diethyl malonate With sodium hydride In N,N-dimethyl-formamide at 10 - 20℃; for 0.5h; Inert atmosphere; Stage #2: 5-chloro-2-nitropyridine In N,N-dimethyl-formamide at 80℃; for 12h;	60.66%
Stage #1: diethyl malonate With sodium hydride In N,N-dimethyl-formamide at 10 - 20℃; for 0.5h; Inert atmosphere; Stage #2: 5-chloro-2-nitropyridine In N,N-dimethyl-formamide at 80℃; for 12h; Inert atmosphere;	60.66%

Upstream product

• 1072-98-6 5-chloro-2-pyridylamine 
• 15128-82-2 3-hydroxy-2-nitropyridine 
• 7722-84-1 dihydrogen peroxide 
• 101079-67-8 3-chloro-2,6-dinitro-pyridine 
• 15128-91-3 3-hydroxy-2,6-dinitropyridine 
• 134251-85-7 2-dimethylsulfilimino-5-chloropyridine 
• 99848-04-1 (3-chloro-6-nitro-[2]pyridyl)-hydrazine 

Downstream Products

• 22109-30-4 2-ethoxy-5-chloropyridine 
• 1072-98-6 5-chloro-2-pyridylamine 
• 1426259-92-8 N-(5-(4-isopropylpiperazin-1-yl)pyridin-2-yl)-4-(pyridin-2-yl)benzamide 
• 866620-36-2 5-(4-isopropylpiperazin-1-yl)pyridin-2-amine 
• 943758-04-1 1-isopropyl-4-(6-nitropyridin-3-yl)piperazine 
• 1374129-88-0 5-(methylthio)-2-(5-phenyl-1H-imidazol-1-yl)pyridine 
• 1374128-87-6 5-(methylsulfonyl)-2-(5-phenyl-1H-imidazol-1-yl)pyridine 
• 1374128-86-5 2-(4-chloro-5-phenyl-1H-imidazol-1-yl)-5-(methylsulfonyl)pyridine 
• 571189-49-6 5-(4-methyl-piperazin-1-yl)pyridin-2-ylamine 
• 775288-71-6 1-(6-nitropyridin-3-yl)piperazine 
• 1374639-75-4 7-cyclopentyl-2-(5-piperazin-1-yl-pyridin-2-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide succinate salt 
• 417722-21-5 5-((6,7-dimethoxyquinolin-4-yl)oxy)pyridine-2-amine 
• 125889-39-6 5-vinyl-2-nitropyridine 

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INHIBITORS OF THE RENAL OUTER MEDULLARY POTASSIUM CHANNEL

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INHIBITORS OF THE RENAL OUTER MEDULLARY POTASSIUM CHANNEL

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