Inhibitory properties of aromatic thiosemicarbazones on mushroom tyrosinase: Synthesis, kinetic studies, molecular docking and effectiveness in melanogenesis inhibition
The group of 19 thiosemicarbazones (TSCs) were synthesized and its inhibitory activity toward mushroom tyrosinase and ability to inhibition of melanogenesis in B16 cells were investigated. Moreover, molecular docking of these compounds to the active site of the enzyme was performed. The obtained results allowed to make the structure-activityrelationship (SAR) analysis. Kinetic studies revealed that
structures. This study that was done using acetophenone thiosemicarbazone (1) as basic model, showed that: (a) the presence of lipophilic substituents in para position on benzene ring, (b) substitution of benzene ring and (c) substitution of hydrogen of thioamidefunction by a phenyl, strongly influence trypanocidal activity. The various modifications to basic structure (1) allowed the synthesis of 1-(4-chlorophenyl)
探索非洲锥虫缩氨基硫脲的结构-活性关系:布氏锥虫布氏,一系列的35缩氨基硫脲(1 - 35)已被合成和表征可以通过1 H NMR,13 C NMR,和FT-IR光谱。使用“ Lilit alamar blue”方法测试所有化合物的杀锥虫活性。考虑到它们的结构,比较了硫半脲的锥虫杀菌能力。该研究结果表明,使用苯乙酮缩氨基硫脲进行(1)作为基本模型,表明:(a)中的亲脂性的取代基的存在对在苯环上的位置,(b)苯环的取代和(c)硫代酰胺官能团的氢被苯基取代,强烈影响锥虫活性。对基本结构(1)的各种修饰允许合成1-(4-氯苯基)亚乙基-4-苯基-硫代氨基脲(34)。该化合物具有3.97μM的锥虫杀灭活性,是该系列中最活跃的。
Palladium mediated C–H bond activation of thiosemicarbazones: Catalytic application of organopalladium complexes in C–C and C–N coupling reactions
structures of complexes 1, 2 and 3 have been determined. All the complexes display intense absorptions in the visible region. Catalytic activity of complexes 1, 2 and 3 toward Suzuki type C–C coupling reactions has been examined, and all three are found to efficiently activate all types of C–X bonds (X = I, Br, Cl and even F) and bring about the C–C bond formation with high yield. These complexes are also
Ketonethiosemicarbazones: Structure–activity relationships for their melanogenesis inhibition
作者:Pillaiyar Thanigaimalai、Ki-Cheul Lee、Vinay K. Sharma、Eunmiri Roh、Youngsoo Kim、Sang-Hun Jung
DOI:10.1016/j.bmcl.2011.04.146
日期:2011.6
A series of 2-(1-phenylalkylidene)hydrazinecarbothioamides 2, 2-(1-phenylalkyl)hydrazinecarbothioamides 3, 2-(3,4-dihydronaphthalen-1(2H)-ylidene)hydrazinecarbothioamide (4), and 2-(1-(thiophen-2-yl)ethylidene)hydrazinecarbothioamide (5) were synthesized for their melanogenesis inhibition in melanoma B16 cells. The SAR of these ketonethiosemicarbazones revealed that the benzylidene hydrogen in ald
cause of growing concern worldwide, because they are potent carcinogenic agents. Thiosemicarbazones are molecules that possess interesting antiaflatoxigenic properties, but in order to use them as crop-protective agents, their cytotoxic and genotoxic profiles must first be assessed. In this paper, a group of thiosemicarbazones and a copper complex are reported as compounds able to antagonize aflatoxin biosynthesis