G. Thiyagarajan, H. S. P. Rao, A. Thamaraichelvan
Jun 1, 2015
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Journal
Research on Chemical Intermediates
Abstract
Microwave-assisted synthesis of a series of hydrazinecarbonyl benzenesulfonamides (5a–r) is reported, and the products have been characterized by nuclear magnetic resonance and Fourier-transform infrared spectral techniques. A comparison with the conventional method for their preparation has also been done. The crystal and molecular structures of compounds 2-(hydrazinecarbonyl)benzenesulfonamide 3, 2-({(2E)-2-[(3,4-dimethoxy)benzylidene]hydrazine}carbonyl)benzenesulfonamide 5e, 2-({(2E)-2-[(2,4-dimethoxy)benzylidene]hydrazine}carbonyl)benzenesulfonamide 5f, and 2-({(2E)-2-[(4-hydroxy)benzylidene]hydrazine}carbonyl)benzenesulfonamide 5k have also been established by single-crystal X-ray diffraction. Antibacterial activity of prepared compounds (5a–r) is reported against Staphylococcus aureus, Bacillus firmus, and Escherichia coli. The preeminent antibacterial activity was shown by 2-({(2E)-2-[(2-hydroxy)benzylidene]hydrazine}carbonyl)benzenesulfonamide 5j against all three tested bacterial organisms.