4-AMINO-3-BROMO-2-METHOXYPYRIDINE

4-AMINO-3-BROMO-2-METHOXYPYRIDINE Property

Melting point:

Oil°

Boiling point:

289.0±35.0 °C(Predicted)

Density 

1.622±0.06 g/cm3(Predicted)

storage temp. 

2-8°C(protect from light)

pka

5.28±0.42(Predicted)

Appearance

yellow solid

InChI

InChI=1S/C6H7BrN2O/c1-10-6-5(7)4(8)2-3-9-6/h2-3H,1H3,(H2,8,9)

InChIKey

FJBMTFANAYFWPT-UHFFFAOYSA-N

SMILES

C1(OC)=NC=CC(N)=C1Br

Safety

HazardClass 

IRRITANT

HS Code 

2933399990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

4-AMINO-3-BROMO-2-METHOXYPYRIDINE Chemical Properties,Usage,Production

Synthesis

Synthesis of 3-bromo-2-methoxypyridin-4-amine (2): 2-Methoxypyridin-4-amine (1, 20.0 g, 161.2 mmol) was dissolved in dichloromethane (200 mL) at 0 °C. To this solution, N-bromosuccinimide (26.6 g, 161.2 mmol) was slowly added, followed by warming the reaction mixture to 30 °C and stirring for 30 min. Upon completion of the reaction, the reaction was quenched with ice-cold water (100 mL) and the reaction mixture was extracted with dichloromethane (300 mL). The organic layers were combined, washed sequentially with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The crude product was ground with a solvent mixture of n-pentane and ether to give 3-bromo-2-methoxypyridin-4-amine (2) as a yellow solid. Yield: 30.0 g, 92% yield; MS (ESI) m/z 203.09 [M + 1]+.

References

[1] Patent: US2017/145026, 2017, A1. Location in patent: Paragraph 0719; 0720
[2] Patent: WO2016/124508, 2016, A1. Location in patent: Page/Page column 60; 61
[3] Patent: CN107151240, 2017, A. Location in patent: Paragraph 0498; 0499; 0500
[4] Patent: US2018/244667, 2018, A1. Location in patent: Paragraph 0106
[5] Tetrahedron, 2008, vol. 64, # 12, p. 2772 - 2782