2-BROMO-4-FLUORO-6-METHYLANILINE

2-BROMO-4-FLUORO-6-METHYLANILINE Property

Melting point:

32-36 °C

Boiling point:

248.9±35.0 °C(Predicted)

Density 

1.589±0.06 g/cm3(Predicted)

Flash point:

110 °C

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

form 

solid

pka

2.45±0.10(Predicted)

color 

White to yellow

CAS DataBase Reference

202865-77-8(CAS DataBase Reference)

Safety

Hazard Codes 

Xi,Xn

Risk Statements 

20/21/22-36/37/38-22

Safety Statements 

26-36/37/39

WGK Germany 

3

Hazard Note 

Irritant

HS Code 

2921430090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

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.

2-BROMO-4-FLUORO-6-METHYLANILINE Chemical Properties,Usage,Production

Synthesis

Example 1 Step a: Synthesis of 2-bromo-4-fluoro-6-methylaniline N-Bromosuccinimide (18.7 g, 0.105 mol) was dissolved in 70 mL of N,N-dimethylformamide, and the solution was added slowly and dropwise to a solution containing 4-fluoro-2-methylaniline (dissolved in 70 mL of N,N-dimethylformamide) at a reaction temperature of 20 °C. The reaction mixture was stirred overnight. The dark colored reaction solution was poured into a mixture consisting of water (1000 mL), brine (50 mL) and ethyl acetate (300 mL). The mixture was transferred to a dispensing funnel, shaken well and separated. The aqueous phase was extracted with ethyl acetate (4 x 150 mL). The organic layers were combined, washed sequentially with water (5 x 100 mL) and brine (2 x 100 mL), dried over anhydrous sodium sulfate, filtered and concentrated. The purity of the raw material was shown to be ≥95% by 1H NMR analysis. The product was further purified by silica gel column chromatography (elution system: ethyl acetate/hexane, 1:8). The pure fractions were combined and evaporated to give 14.9 g of product. The impure fractions were combined, concentrated and redissolved in ether (30 mL) and extracted with 5% hydrochloric acid (5 x 10 mL). The acidic aqueous phase was alkalized with aqueous potassium hydroxide and then extracted with ether to give 0.8 g of the target compound. The total yield was 15.7 g (77% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm: 7.16 (dd, 3JH-F = 8.3 Hz, 4JH-H = 2.9 Hz, 1H, Ar), 6.91 (dd, 3JH-F = 9.3 Hz, 4JH-H = 2.9 Hz, 1H, Ar), 4.83 (br.s, 2H, NH2), 2.16 (s 3H, CH3).

References

[1] Patent: WO2011/6803, 2011, A1. Location in patent: Page/Page column 34
[2] Patent: WO2014/64149, 2014, A1. Location in patent: Page/Page column 27
[3] Chinese Journal of Chemistry, 2018, vol. 36, # 9, p. 815 - 818