In this study, N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide and poly(N-bromo-N-ethylbenzene-1,3-disulfonamide) were used as efficient catalysts for the one-pot synthesis of 3,5,6-trisubstituted-1,2,4-triazines from readily available acid hydrazides, ammonium acetate and dicarbonyl compounds at 100 °C in good to excellent yields under solvent-free conditions.
R. Ghorbani-Vaghei, A. Shahriari, Z. Salimi and S. Hajinazari, RSC Adv., 2015, 5, 3665 DOI: 10.1039/C4RA10892B
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