66585-10-2

Upstream product

• 95161-88-9 7-(benzyloxy)-2-phenyl-4H-chromen-4-one 
• 117096-61-4 7-hydroxy-2-phenyl-3-benzoylchromone 
• 952018-33-6 1-(2-hydroxy-4-tetrahydropyran-2-yloxy-phenyl)-3-phenyl-propane-1,3-dione 
• 94-02-0 ethyl 3-oxo-3-phenylpropionate 
• 98-95-3 nitrobenzene 
• 108-46-3 recorcinol 
• 103-73-1 Phenetole 
• 101-84-8 diphenylether 
• 89-84-9 2',4'-dihydroxy-4-acetophenone 
• 93-97-0 benzoic acid anhydride 
• 72994-98-0 4-oxo-2-phenyl-4H-chromen-7-yl acetate 
• 6515-36-2 7-hydroxy-2-phenyl-chroman-4-one 
• 7664-93-9 sulfuric acid 
• 5465-06-5 <4-(benzoyloxy)-2-hydroxybenzoyl>benzoylmethane 

Downstream Products

• 109817-89-2 7-dichloroacetoxy-2-phenyl-chromen-4-one 
• 27654-56-4 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid isopropyl ester 
• 27654-55-3 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid propyl ester 
• 111270-57-6 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid allyl ester 
• 27654-58-6 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid isobutyl ester 
• 36556-15-7 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid isopentyl ester 
• 36556-16-8 (4-oxo-2-phenyl-4H-chromen-7-yloxy)-acetic acid hexyl ester 
• 42345-27-7 8-acetyl-7-hydroxy-2-phenyl-chromen-4-one 
• 1148-48-7 7-chloro-2-phenyl-4H-1-benzopyran-4-one 
• 108238-58-0 7-hydroxy-4-oxo-2-phenyl-4H-chromene-8-sulfonic acid 
• 65548-54-1 7,8-dimethoxyflavone 
• 109688-08-6 4-oxo-2-phenyl-4H-chromene-7,8-diyl diacetate 

Relevant academic research and scientific papers

FeCl3 catalyzed dehydrative cyclisation of 1, 3 - (diaryl diketones) to flavones

FeCl3 in catalytic amount effects smooth conversion of substituted 1- (2-hydroxy phenyl) - 3 - phenyl - 1, 3 - propanediones to the corresponding flavones in high yields.

Glucosylation of hydroxyflavones by glucosyltransferases from Phytolacca americana

Cell suspension cultures of Phytolacca americana can glucosylate 6- and 7-hydroxyflavone, but not 5-hydroxyflavone. In order to identify the enzymes responsible for these transformations, glucosyltransferases (GTs) from P. americana were overexpressed in Escherichia coli and purified. The purified PaGT3 enzyme could glucosylate 6- and 7-hydroxyflavone when incubated with UDP-glucose, a glucosyl donor molecule, but PaGT2 could conjugate a glucose moiety only to 6-hydroxyflavone. E. coli cells expressing PaGT2 and 3 could also be utilized for the glucosylation of hydroxyflavones. The glucoside products which had accumulated in the medium of overnight E. coli cell cultures were isolated using hydrophobic resins. This methodology might be suitable for the glucosylation of aglycones with important health-related properties.

Identification of inhibitors targeting polyketide synthase 13 of Mycobacterium tuberculosis as antituberculosis drug leads

Polyketide synthase 13 (Pks13) is an essential enzyme in the synthesis of mycolic acids in Mtb. Therefore, Pks13 is a promising drug target for tuberculosis treatment. We used a structure-guided approach to identify novel chemotype inhibitors of Pks13 and assessed them using a Pks13 enzymatic assay and surface plasmon resonance. The structure–activity relationships (SAR) results demonstrated that the substituents at the 2, 5, and 6 positions of the 4H-chromen-4-one scaffold are critical for maintaining the MIC. Compound 6e with 2-hydroxyphenyl at the 2 position of the 4H-chromen-4-one scaffold, exhibited potent activity against Mtb H37Rv (MIC = 0.45 μg/mL) and displayed good Pks13 affinity and inhibition (IC50 = 14.3 μM). This study described here could provide an avenue to explore a novel inhibitor class for Pks13 and aid the further development of antituberculosis drugs.

Divergent synthesis of flavones and flavanones from 2′-hydroxydihydrochalconesviapalladium(ii)-catalyzed oxidative cyclization

Divergent and versatile synthetic routes to flavones and flavanonesviaefficient Pd(ii) catalysis are disclosed. These Pd(ii) catalyses expediently provide a variety of flavones and flavanones from 2′-hydroxydihydrochalcones as common intermediates, depending on oxidants and additives,viadiscriminate oxidative cyclization sequences involving dehydrogenation, respectively, in a highly atom-economic manner.

Design, synthesis and apoptosis inducing activity of nonsteroidal flavone-methanesulfonate derivatives on MCF-7 cell line as potential sulfatase inhibitor

In recent years, focusing on new potent anticancer agents with selective activity is one of the greatest challenges in cancer therapy. Breast cancer is the most common cancer and the main cause of cancer deaths in women. The sulfatase enzyme plays an important role in converting the sulfated steroids into non-sulfate steroid hormones, which increases the growth and development of many hormone-dependent cancers, such as breast cancer. In this regard, structure-based optimization was conducted to design novel flavone-sulfonates pharmacophore as a new steroid sulfatase inhibitor. In the present work, the conventional methods for the synthesis of 4-oxo-2-phenyl-4H-chromen-7-yl methanesulfonate derivatives were reported. Their cytotoxicity was evaluated with MTT assay against a breast cancer cell line (MCF-7). The apoptosis inducing activity of the most cytotoxic compound 3c with an IC50 value of 0.615 μM was evaluated in comparison to docetaxel in the presence of estradiol which is a crucial growth factor to survive the cancerous cells. The results of double staining Annexin V-FITC/PI analysis suggested that the cytotoxic activity of this compound 3c in MCF-7 cells occurs via apoptosis. Molecular docking studies were conducted to clarify the inhibition mode of the most promising compound (3c) over the sulfatase (1P49) binding site. The analysis revealed the role of hydrogen bond interaction with Gly181 and hydrophobic interactions through the 1P49 active site in the ligand-receptor complex as significant descriptors to rationalize the potential inhibition activity. [Figure not available: see fulltext.]

Chromone derivatives bearing pyridinium moiety as multi-target-directed ligands against Alzheimer's disease

A new serise of 7-hydroxy-chromone derivatives bearing pyridine moiety were synthesized, and evaluated as multifunctional agents against Alzheimer's disease (AD). Most of the compounds were good AChE inhibitors (IC50 = 9.8–0.71 μM) and showed remarkable BuChE inhibition activity (IC50 = 1.9–0.006 μM) compared with donepezil as the standard drug (IC50 = 0.023 and 3.4 μM). Compounds 14 and 10 showed the best inhibitory activity toward AChE (IC50 = 0.71 μM) and BuChE (IC50 = 0.006 μM), respectively. The ligand–protein docking simulations and kinetic studies revealed that compound 14 and 10 could bind effectively to the peripheral anionic binding site (PAS) of the AChE and BuChE through mixed-type inhibition. In addition, the most potent compounds showed acceptable neuroprotective activity on H2O2- and Aβ-induced.neurotoxicity in PC12 cells, more than standard drugs. The compounds could block effectively self- and AChE-induced Aβ aggregation. All the results suggest that compounds 14 and 10 could be considered as promising multi-target-directed ligands against AD.

Flavonoid analogues as urease inhibitors: Synthesis, biological evaluation, molecular docking studies and in-silico ADME evaluation

A series of novel flavonoid analogues were designed and synthesized. The aimed compounds for urease inhibitory activities were clearly superior to the control drug thiourea (more than 10 times). Among these compounds, L2 (IC50 = 1.343 μM) and L12 (IC50 = 1.207 μM) exhibited the most excellent urease inhibitory activity in vitro. The molecular dockings of L2, L12 and L22 into urease were performed to explore the binding modes and their structure-activity relationship. Furthermore, these aimed compounds showed good druggable properties.

Nitrogen-containing flavonoid and their analogs with diverse B-ring in acetylcholinesterase and butyrylcholinesterase inhibition

In this study, a series of new flavones (2-phenyl-chromone), 2-naphthyl chromone, 2-anthryl-chromone, or 2-biphenyl-chromone derivatives containing 6 or 7-substituted tertiary amine side chain were designed, synthesized, and evaluated in acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibition. The results indicated that the alteration of aromatic ring connecting to chromone scaffold brings about a significant impact on biological activity. Compared with flavones, the inhibitory activity of 2-naphthyl chromone, 2-anthryl-chromone derivatives against AChE significantly decreased, while that of 2-biphenyl chromone derivatives with 7-substituted tertiary amine side chain is better than relative flavones derivatives. For all new synthesized compounds, the position of tertiary amine side chain obviously influenced the activity of inhibiting AChE. The results above provide great worthy information for the further development of new AChE inhibitors. Among the newly synthesized compounds, compound 5a is potent in AChE inhibition (IC50 = 1.29 ± 0.10 μmol/L) with high selectivity for AChE over BChE (selectivity ratio: 27.96). An enzyme kinetic study of compound 5a suggests that it produces a mixed-type inhibitory effect against AChE.

Biocatalytic green alternative to existing hazardous reaction media: Synthesis of chalcone and flavone derivatives via the Claisen-Schmidt reaction at room temperature

Owing to the increasing amount of waste materials around the globe, the conversion of waste or secondary by-products to value-added products for various applications has gained significant interest. Herein, two novel agro-food waste products, Musa sp. 'Malbhog' peel ash (MMPA) and Musa Champa Hort. ex Hook. F. peel ash (MCPA) are used as catalysts to promote an inexpensive, efficient and eco-friendly carbon-carbon bond forming crossed aldol reaction at room temperature in solvent free conditions. Furthermore, the resulting products were subjected to reactions with these promoters in an oxygen atmosphere and led to the formation of novel flavone derivatives. Moreover, the used catalysts were properly characterized using different sophisticated analytical techniques such as Fourier-transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), Brunauer-Emmett-Teller analysis (BET), Raman spectroscopy, scanning electron microscopy energy dispersive X-ray spectroscopy (SEM-EDS), transition electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) along with element detection using atomic absorption spectroscopy and ion chromatographic methods. These two approaches are metal free, as well as being devoid of any extra additives, co-catalysts, harsh conditions, the use of column chromatography for purification and result in a higher yield of the product within a short space of time. The catalytic abilities of the promoter were also examined to synthesize important bioactive molecules such as butein and apigenin at room temperature. With gram scale synthesis of the chalcone derivatives, the used catalysts (MMPA and MCPA) were further reused for five cycles and did not demonstrate any loss in catalytic activity.

Synthesis and biological evaluation of flavone-8-acrylamide derivatives as potential multi-target-directed anti Alzheimer agents and investigation of binding mechanism with acetylcholinesterase

In a search for novel multifunctional anti-Alzheimer agents, a congeneric set of seventeen flavone-8-acrylamide derivatives (8a─q)were synthesized and evaluated for their cholinesterase inhibitory, antioxidant, neuroprotective and modulation of Aβ aggregation activities. The target compounds showed effective and selective inhibitory activity against the AChE over BuChE. In addition, the target compounds also showed moderate anti-oxidant activity and strong neuroprotective capacities, and accelerated dosage-dependently the Aβ aggregation. Also, we presented here a complete study on the interaction of 8a, 8d, 8e, 8h and 8i with AChE. Through fluorescence emission studies, the binding sites number found to be 1, binding constants were calculated as 2.04 × 104, 2.22 × 104, 1.18 × 104, 9.8 × 103 and 3.2 × 104 M?1 and free energy change as ?5.83, ?5.91, ?5.51, ?5.41 and ?6.12 kcal M?1 at 25 °C which were well agreed with the computational calculations indicating a strong binding affinity of flavones and AChE. Furthermore, the CD studies revealed that the secondary structure of AChE became partly unfolded upon binding with 8a, 8d, 8e, 8h and 8i.