Uses
3-Aminobenzenesulfonamide serves as a precursor for synthesizing 1-substituted-3-(3-aminosulfonylphenyl)thioureas by reacting with freshly prepared aroyl or heteroaryl isothiocyanates in dry acetonitrile[1]. It is also used to prepare pyridinium derivatives through reaction with pyrylium salts and acetic anhydride[2]. In membrane fabrication, 3-aminobenzenesulfonamide acts as a monoamine monomer introduced into interfacial polymerization, where it competes with polyethyleneimine for trimesoyl chloride reaction sites to produce positively charged nanofiltration membranes[3].
Synthesis
(a) 3-Nitrobenzenesulfonamide (1.0 g, 5 mmol) was suspended in 10 mL of methanol, followed by addition of tetrahydrofuran (THF) until the solid was completely dissolved. Ammonium acetate (1.45 g, 23 mmol) and 10% palladium/carbon catalyst (205 mg) were added sequentially at 0 °C. The reaction temperature was maintained at 0-5 °C until the gas release stopped completely. The reaction system was then warmed to room temperature and stirred continuously for 2 hours. Upon completion of the reaction, the mixture was filtered through a diatomaceous earth pad and the solid residue was washed well with THF. Concentration of the filtrate gave 3-aminobenzenesulfonamide as a white solid (810 mg, 93% yield), which could be used in subsequent reactions without further purification. MS (+ESI): 173.0 (M+H+).
Synthesis Reference(s)
[1] Patent: WO2009/39553, 2009, A1. Location in patent: Page/Page column 58-59
[2] Patent: WO2008/129080, 2008, A1. Location in patent: Page/Page column 156; 174
[3] Bioorganic and Medicinal Chemistry Letters, 2007, vol. 17, # 1, p. 28 - 33
[4] Patent: CN106543077, 2017, A. Location in patent: Paragraph 0069-0071
[5] Farmaco, Edizione Scientifica, 1959, vol. 14, p. 751,761
References
[1] Zaib, S., Saeed, A., Stolte, K., Flörke, U., Shahid, M., & Iqbal, J. (2014). New aminobenzenesulfonamide–thiourea conjugates: Synthesis and carbonic anhydrase inhibition and docking studies. European Journal of Medicinal Chemistry, 78, 140–150.
https://doi.org/10.1016/j.ejmech.2014.03.023 [2] Akocak, S., Güzel-Akdemir, Ö., Sanku, R. K. K., Russom, S. S., Iorga, B. I., Supuran, C. T., & Ilies, M. A. (2020). Pyridinium derivatives of 3-aminobenzenesulfonamide are nanomolar-potent inhibitors of tumor-expressed carbonic anhydrase isozymes CA IX and CA XII. Bioorganic Chemistry, 103, 104204.
https://doi.org/10.1016/j.bioorg.2020.104204 [3] Yang, Y., Gao, T., Ma, W., Yang, H., Bi, Q., Zhong, J., & Matsuyama, H. (2025). A New Strategy for Tunable Pore Size Polyamide Nanofiltration Membranes during the Interfacial Polymerization by the Dynamic Hydrophilic Site Resistance Balance of 3-Aminobenzenesulfonamide in the Aqueous Phase. ACS ES&T Water, 5(9), 5739–5748.
https://doi.org/10.1021/acsestwater.5c00737
