A short and simple synthesis of tetrahydropyrimidine derivatives were accomplished in good to excellect yields at room temperature by the reaction of dimethylacetalynedicarboxylate, aniline, and formaldehyde in the presence of 5 mol% of molecular iodine at room temperature in ethanol for 5 min.
Solvent-free one-pot synthesis of polysubstituted tetrahydropyrimidines and their antioxidant and antimicrobial properties
Abstract A versatile and highly efficient one-potmulticomponentapproach for the synthesis of novel multisubstituted tetrahydropyrimidine (dimethyl/diethyl-1,3-disubstituted-1,2,3,6-tetrahydropyrimidine-4,5-dicarboxylate) derivatives catalyzed by Bromo(dimethylsulfonium) bromide under solvent-free conditions has been developed. The protocol is eco-friendly, operationally simple, and proceeds in short
摘要 一种通用且高效的一锅多组分方法,用于合成由溴(Bromo)催化的新型多取代四氢嘧啶(二甲基/二乙基-1,3-二取代-1,2,3,6-四氢嘧啶-4,5-二羧酸酯)衍生物。已经开发了无溶剂条件下的溴化二甲基s)溴化物。该方案环保,操作简单,反应时间短,可提供高产率,高纯度(90–95%)的稳定目标化合物,而无需任何副产物。此外,该方案的范围扩展到脂族底物,从而建立了催化剂的多功能性。筛选铅化合物的抗氧化剂和抗菌活性。其中,化合物 4a , 4d , 4e 与标准庆大霉素相比, 4j 具有优异的抗菌活性。与标准伊曲康唑相比,化合物 4e 和 4k 表现出优异的抗真菌活性。这项研究的结果表明,所有合成的化合物均以浓度依赖性方式清除了DPPH自由基。与标准抗坏血酸相比,该化合物的IC 50值为13.28至23.16 µM。发现化合物 4f 是良好的抗氧化剂。 图形概要 由一丁二酸,胺和甲醛经一