Xanthine oxidase inhibitory properties and anti-inflammatory activity of 2-amino-5-alkylidene-thiazol-4-ones
摘要:
Thirty 2-amino-5-alkylidene-thiazol-4-ones were assayed for inhibitory activity against commercial enzyme xanthine oxidase (XO) in vitro and XO in rat liver homogenate as well as for anti-inflammatory response on human peripheral blood mononuclear cells (PBMCs). 4-((2-Benzylamino-4-oxothiazol-5(4H)-ylidene)-methyl)benzonitrile showed the most potent inhibitory effect against commercial XO (IC50 = 17.16 mu g/mL) as well as against rat liver XO (IC50 = 24.50 mu g/mL). All compounds containing the 4-cyanobenzylidene group or (indol-3-yl)methylene group at the position 5 of thiazol-4-one moiety were moderately potent inhibitors of commercial XO. The assayed compounds were docked into the crystal structures of XO enzyme complexes with three diverse inhibitors (PDB codes: 1FIQ, 1VDV, and 1V97) using OEDocking software. Our results strongly point to a correlation between the data on inhibitory activity against commercial XO and data on antioxidant activity of studied compounds, screened using a lipid peroxidation (LP) method. 2-(Benzylamino)-5-((thiophen-2-yl)methylene)thiazol-4(5H)-one showed the highest anti-inflammatory response on PBMCs, exerted most probably through the NF-kappa B inhibition. Studied 2-amino-5-alkylidene-thiazol-4-ones obey the "Rule of five" and meet all criteria for good solubility and permeability. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
template-free ionic carbon nitride nanotubes (K-g-C3N4) were created via thermal polymerizing and aqueous alkaline liquid-phase exfoliation. The characterization of alkaline K-doped ionic graphitic carbon nitride (K-g-C3N4) was determined by FT-IR, SEM, EDS, and TGA analysis. A simple, facile, and efficient synthesis of 2-amino-5-alkylidene-thiazol-4-ones derivatives via a multicomponent reaction of various
石墨氮化碳 (gC 3 N 4 ) 具有类似于石墨的层状结构,并在有机转化中提供令人兴奋和独特的支持。使用边缘功能化的石墨氮化碳通过掺杂各种官能团并将其转变为另一种形态已成为近十年来关注的焦点。具有弱碱性的富氮结构;因此,它必须通过各种功能化来改善其性能。在此,首次通过热聚合和水性碱性液相剥离制备了无模板离子氮化碳纳米管(KgC 3 N 4 )。碱性K掺杂离子石墨碳氮化碳(KgC 3N 4 ) 通过FT-IR、SEM、EDS和TGA分析确定。 使用可重复使用的 KgC 3 N 4作为绿色催化剂,通过各种醛、胺和罗丹宁在乙醇中的多组分反应,简单、简便、高效地合成 2-氨基-5-亚烷基-噻唑-4-酮衍生物。发达。通过用罗丹明改变醛和胺的结构来探索反应范围。各种 2-氨基-5-亚烷基-噻唑-4-酮在 60-180 分钟内的产率范围在 65% 和 96% 之间。由于 KgC 3 N 4的异质性,催
An Efficient One-pot Synthesis of 2-Amino-5-arylidenethiazol-4-ones Catalyzed by MgO Nanoparticles
作者:Narges Shariati、Robabeh Baharfar
DOI:10.1002/jccs.201300425
日期:2014.3
AbstractA mild and efficient protocol for the synthesis of 2‐amino‐5‐arylidene‐1,3‐thiazol‐4(5H)‐ones is reported by three component reaction of aldehydes, rhodanine and secondary amines in the presence of magnesium oxide nanoparticles as heterogeneous nanocatalyst in good yields and short reaction times.
Reactions of N,N-Disubstituted 5-Arylmethylidene-2-amino-thiazol-4(5H)-ones with CH Acids
作者:Kamal A. Kandeel、Ali M. Youssef、Hany M. El-Bestawy、Mohamed T. Omar
DOI:10.1007/s007060200092
日期:2002.9.1
N,N-Disubstituted 5-arylmethylidene-2-aminothiazol-4(5H)-ones reacted with diethyl malonate, ethyl benzoylacetate, acetylacetone, or cyclopentadiene in refluxing toluene and in presence of powdered sodium to give the respective 5-arylmethylidene-2'-amino-2,5'-bithiazolylidene-4,4'-dione derivatives in moderate yields. 5-Benzylidene-2-morpholin-4-yl-2-thiazol-4(5H)-one reacted with malononitrile in toluene and in presence of powdered sodium under mild conditions to afford the 1:1 adduct, benzylmalononitrile, and 2-morpholin-4-yl-2-thiazol-4(5H)-one. However, similar treatment of 5-(4-methoxyphenylmethylidene)-2-morpholin-4-yl-2-thiazol-4(5H)-one with malononitrile yielded the 2,5'-bithiazolylidene-4,4'-dione derivative together with 4-methoxyphenylmethylidene malononitrile. Treatment of 5-benzylidene- and 5-(4-methoxyphenylmethylidene)-2-morpholin-4-yl-2-thiazol-4(5H)-ones with 3-phenyl-4-oxo-2-thioxo-1,3-thiazolidine in refluxing toluene and in presence of powdered sodium produced 5-arylmethylidene-3-phenyl-4-oxo-2-thioxo-1,3-thiazolidines in good yields. The structures of all products were deduced from microanalytical and spectroscopic data, mechanistic details are discussed.
Three-component one-pot synthetic route to 2-amino-5-alkylidene-thiazol-4-ones
作者:Marko Anderluh、Marko Jukič、Rok Petrič
DOI:10.1016/j.tet.2008.10.045
日期:2009.1
A fast and straightforward three-component reaction to 2-amino-5-alkylidene-thiazol-4-ones is described. The one-pot methodology, reported for the first time, involves Knoevenagel condensation of aromatic aldehydes and rhodanine followed by displacement of the thiocarbonyl sulfur with primary or secondary amines in the same reaction mixture. The reactions were performed using a dedicated microwave reactor, which enabled short reaction times and easy work-up. (C) 2008 Elsevier Ltd. All rights reserved.
Mechanism of the recyclization of 2-amino-5-benzylidene-1,3-thiazol-4(5H)-one into derivatives of 2-amino-5-benzylidene-1,5-dihydro-4H-imidazol-4-one
作者:S. M. Ramsh、A. V. Smirnova、S. Yu. Solovyova、Song Minyan
DOI:10.1007/s10593-008-0005-9
日期:2008.1
Mechanisms are given for reactions taking place upon heating 2-amino-5-benzylidene-1,3-thiazol-4(5H)-one in a medium consisting of a secondary amine.