2-Bromo-3-nitropyridine Chemical Properties

Melting point:

122-125 °C (lit.)

Boiling point:

244.0±20.0 °C(Predicted)

Density 

1.8727 (rough estimate)

refractive index 

1.6200 (estimate)

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

form 

powder to crystal

pka

-3.24±0.10(Predicted)

color 

Light orange to Yellow to Green

BRN 

124504

InChIKey

ZCCUFLITCDHRMG-UHFFFAOYSA-N

CAS DataBase Reference

19755-53-4(CAS DataBase Reference)

Safety Information

Hazard Codes 

Xi,Xn

Risk Statements 

36/37/38-20/21/22

Safety Statements 

26-36-36/37/39-22

WGK Germany 

3

HazardClass 

IRRITANT

HS Code 

29333990

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

2-Bromo-3-nitropyridine Usage And Synthesis

Chemical Properties

Off-white to cream crystalline powder

Uses

2-Bromo-3-nitropyridine may be used in the synthesis of the following:

• 3-nitropyridine-2-carbonitrile
• pyrrolo[3,2-b]pyridine
• 3-(hetero)arylated phenothiazines
• 7-anilino-6-azaindole-1-benznesulfonamides

General Description

2-Bromo-3-nitropyridine is a pyridine derivative. It can be synthesized from 3-nitropyridine-2-amine.

Synthesis

General procedure for the synthesis of 2-bromo-3-nitropyridine from 2-amino-3-nitropyridine: 3-nitropyridin-2-amine (1.0 g, 7.19 mmol) was dissolved in 35 mL of DMSO, KNO2 (2.45 g, 28.75 mmol) and CuBr (0.206 g, 1.44 mmol) were added. A 48% aqueous HBr solution (3.60 mL, 32.0 mmol) dissolved in DMSO (35 mL) was slowly added dropwise to the above mixture at 35 °C. After the dropwise addition was completed, the reaction mixture was stirred at 35°C for 4 hours. Subsequently, the reaction solution was transferred to 100 mL of ice water solution containing K2CO3 (7 g). The reaction mixture was extracted with ether, the ether layer was washed with water and dried over anhydrous Na2SO4. The solvent was removed by concentration under reduced pressure to give the crude product. The crude product was purified by silica gel column chromatography (eluent: 100% dichloromethane) to afford 2-bromo-3-nitropyridine as a beige powder (0.662 g, 45% yield). Thin-layer chromatography Rf value was 0.75 (dichloromethane); melting point was 121-122 °C (literature value: 123-124 °C); IR (KBr) νmax (cm-1): 3042 (νCHar), 1578 and 1562 (νC=C), 1524 (νasNO2), 1350 (νsyNO2); 1H NMR (400 MHz. DMSO-d6): δ 8.73 (dd, 1H, J1=1.6Hz, J2=4.8Hz, H-6), 8.54 (dd, 1H, J1=1.6Hz, J3=8.0Hz, H-4), 7.79 (dd, 1H, J2=4.8Hz, J3=8.0Hz, H-5); 13C NMR (100MHz, DMSO -d6): δ 153.26 (C-6), 147.08 (C-3), 134.48 (C-4), 132.08 (C-2), 124.44 (C-5); MS (ESI) m/z (%): 202.9 (100) [M+H]+, 204.9 (100) [M+H+2]+. Calculated elemental analysis (C5H3BrN2O2): C, 29.58; H, 1.49; N, 13.80. measured values: C, 29.63; H, 1.50; N, 13.83.

References

[1] European Journal of Medicinal Chemistry, 2012, vol. 58, p. 171 - 183
[2] Tetrahedron, 2002, vol. 58, # 17, p. 3323 - 3328
[3] Canadian Journal of Chemistry, 2005, vol. 83, # 3, p. 213 - 219

2-Bromo-3-nitropyridine(19755-53-4)Related Product Information

• 3-Nitrotoluene
• 3-Hydroxypyridine
• 3-Nitropyridine
• 2-Chloro-3-hydroxypyridine
• 1-Hexadecylpyridinium bromide
• 3-Aminopyridine
• 2-Bromo-3-methylpyridine
• 5-Chloro-2-bromo-3-nitropyridine
• 2-BROMO-3-NITRO-5-METHYL PYRIDINE
• 2-Bromo-4-methylpyridine
• 2-Bromo-3-methylbenzaldehyde
• 2-Bromo-4-nitroimidazole
• 2-Bromo-4-fluoropyridine
• 2-Bromo-5,6-diphenylpyrazine
• 2-Bromo-3-trifluoromethylpyridine
• 2-Bromo-4-chloropyridine
• 2-Bromo-3-fluoropyridine
• 3-Amino-2-bromopyridine