Benzenesulfonyl chloride → N-(m-Nitrophenyl)benzenesulphonamide

To 6.17 g (44.7 mmol) of 3-nitroaniline and 8.41 mL (48.2 mmol) of N,N-diisopropylethylamine in 150 mL of anhydrous diethyl ether was added 5.14 mL (40.2 mmol) of benzenesulfonyl chloride. The mixture was heated to reflux under nitrogen with stirring for 16 h, cooled and the resulting two-phase mixture scratched to crystallize the insoluble oil. After decanting the ether layer, the derived solid was dissolved in 300 mL of dichloromethane and the solution washed with 2N HCl (3×200 mL), saturated NaHCO3 (200 mL), brine (200 mL), dried (Na2SO4) and concentrated to give 9.62 g (86%) of the title compound as a light tan solid. 1H-NMR (300 MHz, CDCl3) δ 7.96 (m, 2H), 7.86 (m, 2H), 7.41-7.63 (m, 5H), and 7.30 (br s, 1H). Mass spectrum (MALDI-TOF, gentisic acid matrix) calcd. for C12H10N2O4S: 301.0 (M+Na). Found: 301.1.

1. temperatureThe mixture was heated
2. temperatureto reflux under nitrogen
3. temperaturecooled
4. customto crystallize the insoluble oil
5. customAfter decanting the ether layer
6. dissolutionthe derived solid was dissolved in 300 mL of dichloromethane
7. washthe solution washed with 2N HCl (3×200 mL), saturated NaHCO3 (200 mL), brine (200 mL)
8. dry with materialdried (Na2SO4)
9. concentrationconcentrated

ORD record

ord-ab4c47a712b14d35901998e7bd04f64e

Source dataset

uspto-grants-2000_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06034127