Synthesis, Spectroscopic Characterization, Crystal structure, Antimicrobial and In Vitro Hemolytic Studies of Some Novel Substituted Thiourea Derivatives
作者:Durga Prasad Singh、Mayank Gangwar、Dharmendra Kumar、Gopal Nath、Seema Pratap
DOI:10.1007/s10870-013-0468-0
日期:2013.11
A series of N,N′-disubstituted thioureas, [R–CONHCSNH–R′] where (R = thiophenyl, furonyl, phenyl and R′ = 4-sulphonamido phenyl, pyrimidine-2yl, thiazole-2yl, 3-nitro phenyl, 2-nitro-4-chloro phenyl, 2-chloro-4-nitro phenyl, 2-methoxy-4-nitro phenyl, and 6-phenyl-1,3,5-triazinyl were synthesized, characterized and screened for their antimicrobial activities. The structures of synthesized compounds were established by elemental analysis and spectroscopic techniques (FT-IR, 1H NMR, and 13C NMR). Single crystal study on compounds 1a and 1c have been done. The compound 1a crystallizes in monoclinic space group Cc, with a = 15.2974(5) Å, b = 11.7766(4) Å, c = 8.1059(3) Å, α = 90°, β = 106.31(3)°, γ = 90° and Z = 4 molecules per unit cell, where as compound 1c crystallizes in orthorhombic space group Pbca, with a = 7.6307(6) Å, b = 11.3895(9) Å, c = 24.121(2) Å, α = β = γ = 90° and Z = 8 molecules per unit cell. All the compounds were tested for their inhibitory activities against four human pathogen bacteria and three fungal strains. The screening data revealed that five compounds showed moderate to good activity whereas one of the compound 1k displayed excellent activity. In vitro hemolytic activity of the compounds has shown them to be nontoxic in nature. Eleven disubstituted thiourea compounds have been synthesized and characterized by elemental analysis, spectroscopic techniques (FT-IR, 1H NMR, and 13C NMR) and single crystal study on two of compounds has been done to understand the proper structural features of the compounds. All the compounds have been screened for their antimicrobial activity; out of them two have shown promising activity against the bacteria and fungi used.
一系列 N,N′-二取代的
硫脲类化合物,[R-CONHCSNH-R′] 其中(R =
噻吩基、
呋喃基、苯基和 R′ = ;对 4-磺酰胺基苯基、
嘧啶-2-基、
噻唑-2-基、3-
硝基苯基、2-硝基-4-
氯苯基、2-
氯-4-
硝基苯基、2-甲氧基-4-
硝基苯基和 6-
苯基-1,3,5-三嗪基进行了合成、表征和抗菌活性筛选。通过元素分析和光谱技术(傅立叶变换红外光谱、1H NMR 和 13C NMR)确定了合成化合物的结构。对化合物 1a 和 1c 进行了单晶研究。化合物 1a 在单斜空间群 Cc 中结晶,a = 15.2974(5) 埃,b = 11.7766(4) 埃,c = 8.1059(3) 埃,α = 90°,β = 106.31(3)°,γ = 90°,Z = 每个单位晶胞有 4 个分子,而化合物 1c 在正方空间群 Pbca 中结晶,a = 7。6307(6) 埃,b = 11.3895(9) 埃,c = 24.121(2) 埃,α = β = γ = 90°,Z = 每单位晶胞 8 个分子。测试了所有化合物对四种人类病原菌和三种真菌菌株的抑制活性。筛选数据显示,五个化合物显示出中等至良好的活性,而其中一个化合物 1k 显示出极佳的活性。这些化合物的体外溶血活性表明它们是无毒的。通过元素分析、光谱技术(傅立叶变换红外光谱、1H NMR 和 13C NMR)和对其中两个化合物的单晶研究,合成了 11 个二取代的
硫脲化合物,并对其进行了表征,以了解化合物的适当结构特征。对所有化合物都进行了抗菌活性筛选,其中两种化合物对所用细菌和真菌具有良好的抗菌活性。