4-BROMO-N-METHYL-BENZENESULFONAMIDE Chemical Properties

Melting point:

70-72

Boiling point:

330.3±44.0 °C(Predicted)

Density 

1.601±0.06 g/cm3(Predicted)

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

form 

solid

pka

11.10±0.30(Predicted)

color 

white

Safety Information

Hazard Codes 

Xi,Xn

Risk Statements 

22

Hazard Note 

Irritant

HS Code 

2935909099

4-BROMO-N-METHYL-BENZENESULFONAMIDE Usage And Synthesis

Synthesis

To a stirred dichloromethane (DCM) solution of methylamine hydrochloride (0.13 g, 1.97 mmol) was sequentially added N,N-diisopropylethylamine (DIPEA, 0.52 mL, 2.95 mmol) and 4-bromobenzenesulfonyl chloride (0.25 g, 0.98 mmol), and the reaction was continuously stirred for 16 h at room temperature. The reaction progress was monitored by thin layer chromatography (TLC). Upon completion of the reaction, the reaction mixture was quenched with deionized water and extracted with dichloromethane (DCM). The organic layers were combined, dried with anhydrous sodium sulfate and concentrated under reduced pressure to afford the target product N-methyl-4-bromobenzenesulfonamide (0.220 g, 89.74% yield) as a yellow semi-solid. Mass spectrometry (MS) analysis showed that [M-1]? m/z 248.0.

References

[1] Patent: US2017/291910, 2017, A1. Location in patent: Paragraph 0430-0432
[2] Journal of the American Chemical Society, 1923, vol. 45, p. 2697
[3] Patent: WO2014/35872, 2014, A1. Location in patent: Page/Page column 136-137

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