537-42-8Relevant articles and documents
Synthesis and evaluation of resveratrol derivatives as fetal hemoglobin inducers
Andersen, Olaf Sparre,Barbieri, Karina Pereira,Bosquesi, Priscila Longhin,Carlos, Iracilda Zepone,Chelucci, Rafael Consolin,Costa, Fernando Ferreira,Dos Santos, Jean Leandro,Fernandes, Guilherme Felipe dos Santos,Lanaro, Carolina,Melchior, Aylime Castanho Bolognesi,Pavan, Aline Renata,Rusinova, Radda,de Souza, Cristiane Maria
, (2020/05/25)
Resveratrol (RVT) derivatives (10a-i) were designed, synthesized, and evaluated for their potential as gamma-globin inducers in treating Sickle Cell Disease (SCD) symptoms. All compounds were able to release NO at different levels ranging from 0 to 26.3percent, while RVT did not demonstrate this effect. In vivo, the antinociceptive effect was characterized using an acetic acid-induced abdominal contortion model. All compounds exhibited different levels of protection, ranging from 5.9 to 37.3percent; the compound 10a was the most potent among the series. At concentrations between 3.13 and 12.5 μM, the derivative 10a resulted in a reduction of 41.1–64.3percent in the TNF-α levels in the supernatants of macrophages that were previously LPS-stimulated. This inhibitory effect was higher than that of RVT used as the control. In addition, the compound 10a and RVT induced double the production of the gamma-globin chains (γG + γA), compared to the vehicle, using CD34+ cells. Compound 10a also did not induce membrane perturbation and it was not mutagenic in the in vivo assay. Thus, compound 10a emerged as a new prototype of the gamma-globin-inducer group with additional analgesic and anti-inflammatory activities and proving to be a useful alternative to treat SCD symptoms.
Protective effect of piceatannol and bioactive stilbene derivatives against hypoxia-induced toxicity in H9c2 cardiomyocytes and structural elucidation as 5-LOX inhibitors
Boccellino, Mariarosaria,Donniacuo, Maria,Bruno, Ferdinando,Rinaldi, Barbara,Quagliuolo, Lucio,Ambruosi, Marika,Pace, Simona,De Rosa, Mario,Olga?, Abdurrahman,Banoglu, Erden,Alessio, Nicola,Massa, Antonio,Kahn, Haroon,Werz, Oliver,Fiorentino, Antonio,Filosa, Rosanna
, p. 637 - 647 (2019/07/31)
Stilbenes with well-known antioxidant and antiradical properties are beneficial in different pathologies including cardiovascular diseases. The present research was performed to investigate the potential protective effect of resveratrol (1) and piceatannol (2), against hypoxia-induced oxidative stress in the H9c2 cardiomyoblast cell line, and the underlying mechanisms. Compounds 1 and 2 significantly inhibited the release of peroxynitrite and thiobarbituric acid levels at na no- or submicromolar concentrations, and this effect was more evident in piceatannol-treated cells, that significantly increased MnSOD protein level in a concentration dependent manner. Furthermore, since piceatannol, which is far less abundant in natural sources, displayed a higher bioactivity than the parent compound, we hereby report on a very fast synthesis and detailed structure-based design of a focused stilbene library. Finally, taking into account that hypoxia-induced ROS accumulation also increases expression and activity of 5-lipoxygenase (5-LOX) with production of leukotrienes, we have disclosed structural key factors crucial for 5-LOX activity. Among the synthesized analogues (3–7), compound 7 was the most effective in improving cardiomyocytes viability and in 5-LOX inhibition. In conclusion, modeling and experimental studies provided the basis for further optimization of stilbene analogues as multi-target inhibitors of the inflammatory and oxidative pathway.
Preparation method of resveratrol compound
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Paragraph 0082-0084, (2019/07/16)
The invention provides a preparation method of a resveratrol compound, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: firstly, carryingout oxidation addition and reduction elimination reaction on alkoxy-substituted benzyl halide, alkoxy-substituted benzaldehyde and a metal catalyst to obtain alkoxy-substituted diacetophenone; then carrying out reduction, reverse elimination and selective debenzylation reaction on the alkoxy-substituted diacetophenone and the metal catalyst in a hydrogen atmosphere to obtain the resveratrol compound. In the preparation method, hydrogenation reduction, reverse elimination and selective debenzylation reaction can be achieved through a one-pot method, trans-olefin is directly obtained through thereaction, and the generation of isomers is avoided; the Lewis acid is removed from the source through the selective catalytic debenzylation of the reaction, so that the method has the advantage of high yield, and is an environment-friendly process. Experimental results show that the products obtained by the preparation method are trans-olefins, the purity can reach more than 99.5%, and the yieldis more than 80%.
Novel Carbazole-Based N-Heterocyclic Carbene Ligands to Access Synthetically Relevant Stilbenes in Pd-Catalyzed Coupling Processes
Girase, Tejpalsingh Ramsingh,Kapdi, Anant R.
supporting information, p. 2611 - 2619 (2019/07/05)
A series of new carbazole-based N-heterocyclic carbene (NHC) ligands have been synthesized in a simple and facile synthetic route and subsequently used in a Pd/carbazole-based NHC catalytic system, which was found to be effective in catalyzing Heck reactions to provide substituted stilbene derivatives in good yields. Several bioactive stilbenes, including pterostilbene, pinosylvin, trimethoxy resveratrol, and resveratrol, were synthesized in good yields, and a 10 mmol scale-up was also performed for trimethoxy resveratrol. The synthetic application was also extended by performing a double-tandem chemoselective Heck reaction followed by Miyaura borylation in a one-pot procedure to give single-step access to synthetically useful stilbenyl boronate esters. Similarly, a unique triple-tandem protocol of a chemoselective Heck reaction/Miyaura borylation/Suzuki–Miyaura coupling reaction sequence was performed for the one-pot modification of biologically relevant molecules.
Iron-Catalyzed Nitrene Transfer Reaction of 4-Hydroxystilbenes with Aryl Azides: Synthesis of Imines via C=C Bond Cleavage
Peng, Yi,Fan, Yan-Hui,Li, Si-Yuan,Li, Bin,Xue, Jing,Deng, Qing-Hai
supporting information, p. 8389 - 8394 (2019/10/16)
C=C bond breaking to access the C=N bond remains an underdeveloped area. A new protocol for C=C bond cleavage of alkenes under nonoxidative conditions to produce imines via an iron-catalyzed nitrene transfer reaction of 4-hydroxystilbenes with aryl azides is reported. The success of various sequential one-pot reactions reveals that the good compatibility of this method makes it very attractive for synthetic applications. On the basis of experimental observations, a plausible reaction mechanism is also proposed.
Synthesis method of pterostilbene
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, (2018/09/21)
The invention provides a synthesis method of pterostilbene. The synthesis method takes 4-hydroxybenzaldehyde as a raw material and comprises the following steps: carrying out acetylation reaction to generate 4-acetoxybenzaldehyde; then carrying out wittig reaction to generate 4-acetoxystyrene; carrying out hydrolysis reaction on 4-acetoxystyrene to generate 4-hydroxystyrene; carrying out Heck reaction on 4-hydroxystyrene to obtain a target product pterostilbene. The method provided by the invention has the advantages of easiness for obtaining the raw materials, high product selectivity, relatively high yield, moderate reaction conditions and simplicity in operation.
Model Guided Development of a Simple Catalytic Method for the Synthesis of Unsymmetrical Stilbenes by Sequential Heck Reactions of Aryl Bromides with Ethylene
Barlow, Helen,Buser, Jonas Y.,Glauninger, Hendrik,Luciani, Carla V.,Martinelli, Joseph R.,Oram, Niall,Thompson-Van Hook, Nichole,Richardson, Jeffery
, p. 2678 - 2690 (2018/06/04)
Stilbenes are important and useful structural moieties, but methods for their preparation typically possess numerous inefficiencies. Presented here is a methodology for the two-step, one pot preparation of unsymmetrical stilbenes via sequential Heck reactions. The first Heck reaction with ethylene gas was analysed as a function of temperature and pressure for electronically differentiated naphthyl bromides and model-aided reaction optimization was utilized to define the system. In addition, reactNMR was utilized to determine ethylene solubility in common organic solvents useful for Heck reactions. Finally, an optimized sequential Heck reaction process was developed and applied to a range of substrates allowing for efficient preparation of unsymmetrical stilbenes, including the natural antioxidant, pterostilbene. (Figure presented.).
Chemo-enzymatic synthesis of (: E)-2,3-diaryl-5-styryl- trans -2,3-dihydrobenzofuran-based scaffolds and their in vitro and in silico evaluation as a novel sub-family of potential allosteric modulators of the 90 kDa heat shock protein (Hsp90)
Bassanini, Ivan,D'Annessa, Ilda,Costa, Massimo,Monti, Daniela,Colombo, Giorgio,Riva, Sergio
, p. 3741 - 3753 (2018/05/31)
Herein we propose a facile, versatile and selective chemo-enzymatic synthesis of substituted (E)-2,3-diaryl-5-styryl-trans-2,3-dihydrobenzofurans based on the exploitation of the laccase-mediated oxidative (homo)coupling of (E)-4-styrylphenols. Thanks to this novel synthetic strategy, a library of benzofuran-based potential allosteric activators of the Heat shock protein 90 (Hsp90) was easily prepared. Moreover, considering their structural analogies to previously reported allosteric modulators, the sixteen new compounds synthesized in this work were tested in vitro for their potential stimulatory action on the ATPase activity of the molecular chaperone Hsp90. Combining experimental and computational results, we propose a mechanism of action for these compounds, and expand the structure-activity relationship (SAR) information available for benzofuran-based Hsp90 activators.
An effective Pd nanocatalyst in aqueous media: Stilbene synthesis by Mizoroki-Heck coupling reaction under microwave irradiation
García, Carolina S.,Uberman, Paula M.,Martín, Sandra E.
, p. 1717 - 1727 (2017/09/27)
Aqueous Mizoroki-Heck coupling reactions under microwave irradiation (MW) were carried out with a colloidal Pd nanocatalyst stabilized with poly(N-vinylpyrrolidone) (PVP). Many stilbenes and novel heterostilbenes were achieved in good to excellent yields starting from aryl bromides and different olefins. The reaction was carried out in a short reaction time and with low catalyst loading, leading to high turnover frequency (TOFs of the order of 100 h-1). The advantages like operational simplicity, high robustness, efficiency and turnover frequency, the utilization of aqueous media and simple product work-up make this protocol a great option for stilbene syntheses by Mizoroki-Heck reaction.
Discovery of efficient stimulators for adult hippocampal neurogenesis based on scaffolds in dragon's blood
Liang, Jian-Hua,Yang, Liang,Wu, Si,Liu, Si-Si,Cushman, Mark,Tian, Jing,Li, Nuo-Min,Yang, Qing-Hu,Zhang, He-Ao,Qiu, Yun-Jie,Xiang, Lin,Ma, Cong-Xuan,Li, Xue-Meng,Qing, Hong
, p. 382 - 392 (2017/05/19)
Reduction of hippocampal neurogenesis caused by aging and neurological disorders would impair neural circuits and result in memory loss. A new lead compound (N-trans-3′,4'-methylenedioxystilben-4-yl acetamide 27) has been discovered to efficiently stimulate adult rats' neurogenesis. In-depth structure-activity relationship studies proved the necessity of a stilbene scaffold that is absent in highly cytotoxic analogs such as chalcones and heteroaryl rings and inactive analogs such as diphenyl acetylene and diphenyl ethane, and validated the importance of an NH in the carboxamide and a methylenedioxy substituent on the benzene ring. Immunohistochemical staining and biochemical analysis indicate, in contrast to previously reported neuroprotective chemicals, N-stilbenyl carboxamides have extra capacity for neuroproliferation-type neurogenesis, thereby providing a foundation for improving the plasticity of the adult mammalian brain.
