Synthesis of some new urea and thiourea derivatives and evaluation of their antimicrobial activities
作者:YILDIZ GÜLKOK、TUBA BİÇER、FATMA KAYNAK ONURDAĞ、SELDA ÖZGEN、MUSTAFA FETHİ ŞAHİN、DENİZ SONGÜL DOĞRUER
DOI:10.3906/kim-1106-54
日期:——
In the present study, 18 new compounds were synthesized, 9 of which were urea (9a-e, 10a-d) while the others were thiourea (11a-e, 12a-d) derivatives. These derivatives were prepared by the reaction of 6-amino-5-nonsubstituted/chloro-3-methyl-2(3H)- benzoxazolones used as key intermediates with the appropriate isocyanates and isothiocyanates. The chemical structures of new compounds were confirmed by ^1H-NMR, mass, and elemental analysis. The synthesized compounds were screened for their antibacterial and antifungal activities against some pathogenic strains. Compounds 9a, 9b, 9e, 10a, and 10c, urea derivatives, and compounds 12a and 12d, thiourea derivatives, exhibited a relatively good inhibitory profile against E. coli, with a MIC value of 32 \mu g/mL when compared with the other target compounds.
本研究中,合成了18种新化合物,其中9种为尿素类(9a-e, 10a-d),其余9种为硫脲类(11a-e, 12a-d)衍生物。这些衍生物是通过以6-氨基-5-未取代/氯-3-甲基-2(3H)-苯并恶唑酮为关键中间体与适当的异氰酸酯和异硫氰酸酯反应制备的。新化合物的化学结构通过^1H-NMR、质谱和元素分析得到确认。合成的化合物经过筛选,针对某些病原菌株进行了抗菌和抗真菌活性测试。尿素类衍生物9a、9b、9e、10a和10c,以及硫脲类衍生物12a和12d,对大肠杆菌表现出相对较好的抑制效果,相对于其他目标化合物,其最低抑制浓度(MIC)值为32 μg/mL。