33942-49-3Relevant academic research and scientific papers
Synthesis, Characterization and Antibacterial Activity of Some Transition Metal Complexes with Thiourea Derivatives
Islam, M. Quamrul,Ansary, A. B. M. Mizanur Rahman,Ali, M. Umar
, p. 233 - 237 (2007/10/03)
Transition metal complexes of Mn(II), Co(II) and Ni(II) ions with 2-hydroxyphenylthiourea, 2-carboxyphenylthiourea and 4-methyl-phenylthiourea have been synthesized and characterized on the basis of elemental analyses, conductivity and magnetic measurements and from their IR spectral studies.The complexes have the general formula: K22-)2(NO3)2>, L2 = Dinegative deprotonated form of the ligand, 2-hydroxyphenylthiourea; , where L = 4-methylphenylthiourea and -)2(NO3)2>, where L- = Uni-negative deprotonated form of the ligand, 2-carboxyphenylthiourea, with 2-hydroxyphenylthiourea and 2-carboxyphenylthiourea, Mn(II), Co(II) and Ni(II) metal ions form 5-coordinate bridging complexes whereas 4-methylphenylthiourea gives rise to 4-coordinated complexes with the same metal ions.The antibacterial activity of the ligands and their complexes have been tested with Bacillus subtilis.Some complexes show higher activity then that of the free ligand value whereas in some cases the activity decreases.Some complexes were found to retain the same activity as that of the ligand. - Key Words: Metal complexes; Thiourea ligands; Antibacterial activity.
REACTIONS OF N-BENZOYL ISOTHIOCYANATE WITH ANTHRANILIC ACID AND METHYL ANTHRANILATE
Kavalek, Jaromir,Kotyk, Milan,El Bahaie, Said,Sterba, Vojeslav
, p. 246 - 255 (2007/10/02)
N-Benzoyl-N'-(2-carboxy- and -2-methoxycarbonylphenyl)thioureas have been obtained by the reaction of N-benzoyl isothiocyanate with anthranilic acid and methyl anthranilate, respectively.Kinetics of cyclization of these compounds into 2-mercapto-3,4-dihydro-4-quinazolone have been studied in water and in methanol.In the base-catalyzed cyclization of N-benzoyl-N'-(2-carboxyphenyl)thiourea the proper cyclization is preceded by solvolysis of the benzoyl group.In the case of N-benzoyl-N'-(2-methoxycarbonylphenyl)thiourea the reaction rate is limited by the base-catalyzed cyclization of the starting benzoyl derivative; the benzoyl group is split off in a subsequent rapid step.
