Heterocyclic compounds from urea derivatives. Part XIX. Adducts from diaminoguanidines and aroyl isothiocyanates and their cyclisation
作者:Frederick Kurzer
DOI:10.1039/j39700001813
日期:——
1-Aminoamidino-4-aroyl(thiosemicarbazides) are produced in high yield from equimolar proportions of aroyl isothiocyanates and NN′-diaminoguanidine salts in aqueous methanol. They are bases and form hydrazones. Both the adducts and their hydrazones are ring-closed by alkali to 3-aryl-5-mercapto-1,2,4-triazoles. The cyclisation of 1-aminoamidino-4-aroyl(thiosemicarbazides) by acids affords, with loss
Antimicrobial Activity of Newly Synthesized 2,5-Disubstituted 1,3,4-Thiadiaozle Derivatives
作者:Mahmoud M.M. Ramiz、Adel A.H. Abdel-Rahman
DOI:10.5012/bkcs.2011.32.12.4227
日期:2011.12.20
A number of new 2,5-disubstituted 1,3,4-thiadiazole and their S- or N-substituted derivatives as well as the corresponding sugar hydrazone derivatives were synthesized and tested for their antimicrobial activity against Bacillus subtilis (Gram-positive), Pseudomonas aeruginosa (Gram-negative), and Streptomyces species (Actinomycetes). The synthesized compounds displayed different degrees of antimicrobial activities or inhibitory actions.