Antimicrobial Activity of New Synthesized Aza -Beta Lactam and Tetrazole Derivatives Bearing Imidazo[2,1-B]Benzothiazole Moiety
作者:Kh. T. A. Al-Sultani、N. Al-Lami
DOI:10.21608/ejchem.2021.55736.3175
日期:2021.3.15
This research, included prepare of some new aza-beta lactam and 1,2,3, 4-tetrazole derivatives from 2-aminobenzothiazole. The first step includes formation of imidazo[2,1-b]benzothiazoles (1) by the condensation of 2-aminobenzathiazole and ethyl-2- chloro acetoacetate in acetone, then compound (1) reaction with hydrazine hydrate 80% to form hydrazone derivative (2). Schiff bases (3-6) were prepared from condensation of hydrazone(2) with various aromatic aldehyde with little drops of glacial acetic acid. Phenyl isocyanate and sodium azide were used for the cyclocyclization of new Schiff bases to form diazetidine (7-10) and tetrazole (11-14) derivatives. Moreover, Newly prepared derivatives were measured by Fourier-transform infrared and some of them by 1H & 13C-NMR. Furthermore, some new derivatives were evaluated as antibacterial.
这项研究包括从 2-氨基苯并噻唑制备一些新的偶氮-beta 内酰胺和 1,2,3, 4-四氮唑衍生物。第一步包括通过 2-氨基苯并噻唑和 2-氯乙酰乙酸乙酯在丙酮中缩合生成咪唑并[2,1-b]苯并噻唑(1),然后化合物(1)与 80%的水合肼反应生成腙衍生物(2)。由腙(2)与各种芳香醛和少量冰醋酸缩合制备希夫碱(3-6)。异氰酸苯酯和叠氮化钠被用于新希夫碱的环化反应,生成重氮杂环丁烷(7-10)和四唑(11-14)衍生物。此外,还对新制备的衍生物进行了傅立叶变换红外光谱测量,并对其中一些衍生物进行了 1H 和 13C-NMR 测量。此外,还对一些新衍生物进行了抗菌评估。