Synthesis of Schiff and Mannich bases of new<i>s</i>-triazole derivatives and their potential applications for removal of heavy metals from aqueous solution and as antimicrobial agents
作者:Zeinab A. Hozien、Ahmed F. M. EL-Mahdy、Ahmad Abo Markeb、Laila S. A. Ali、Hassan A. H. El-Sherief
DOI:10.1039/d0ra02872j
日期:——
produced. Therefore, reaction of these Schiff's bases with primary or secondary amines with formaldehyde in ethanol at room temperature afforded the corresponding Mannich bases 13–14. The structures of all new compounds were confirmed using spectral analysis. Furthermore, most of the synthesized derivatives showed high efficiency for removal of Pb2+, Cd2+, Ca2+, and Mg2+ from aqueous solutions, as well
一种高效、简单、一锅法的双 Mannich 反应合成环化 2-methyl-6-取代-6,7-dihydro-5 H-s -triazolo[5,1- b ]-1,3,5 -噻二嗪通过5-methyl-1 H-s -triazole -3-thiol ( 1 ) 与甲醛和脂肪族伯胺在乙醇中在室温下反应,而与伯芳族胺,未环化的 3-methyl-1-((取代-产生氨基)甲基)-1 H-s-三唑-5-硫醇。在 Mannich 反应条件下,4-氨基-3-甲基-s-三唑-5-硫醇 ( 8 ) 仅在沸腾的乙醇中或室温下与甲醛反应得到 3-methyl-5,6-dihydro- s-三唑并[3,4- b ]-1,3,4-噻二唑,不掺入仲胺。此外,化合物8与芳香醛在不同反应条件下反应后,生成了未环化的席夫碱。因此,这些席夫碱与伯胺或仲胺与甲醛在乙醇中在室温下反应得到相应的曼尼希碱13-14。使用光谱分析