Category: ethers-buliding-blocks

Effects of Radix scrophulariae on hyperthyroidism assessed by metabonomics and network pharmacology was written by Zhang, Ning;Lu, Fang;Li, Zihui;Zhao, Hongwei;Pang, Mu;Ye, Tao;Wang, Xijun;Liu, Shumin. And the article was included in Frontiers in Pharmacology in 2021.Recommanded Product: 4-Hydroxy-3-methoxyphenethanol The following contents are mentioned in the article:

Radix Scrophulariae (Chinese name: Xuanshen), a traditional Chinese herb, is used for the treatment of hyperthyroidism, and in this study, its mechanisms were evaluated by metabonomics and system pharmacol. To study the anti-hyperthyroidism effects of R. Scrophulariae, a male SD rat (180-220 g) model of hyperthyroidism induced by Euthyrox was used. Thirty rats were randomly distributed into three groups: the Model group, the R. Scrophulariae treatment group (RS group) and the healthy Control group. Using the UHPLC/Q-TOF-MS metabolomics approach, 44 metabolites were found to be profoundly altered in the model group, and the levels of these biomarkers were significantly decreased after treatment with R. Scrophulariae. Forty-four metabolites and 13 signaling pathways related to R. Scrophulariae, including the biosynthesis of unsaturated fatty acids, primary bile acid biosynthesis and sphingolipid metabolism, were explored, and linoleic acid metabolism and sphingolipid metabolism were identified as the most relevant metabolic pathways. In addition, the system pharmacol. paradigm revealed that R. Scrophulariae contains 83 active ingredients and is related to 795 genes, and 804 disease genes are related to hyperthyroidism. The construction of the R. Scrophulariaceae-chem. composition-target-hyperthyroidism network identified a total of 112 intersection genes. The enriched gene targets were analyzed, and five pathways were found to be enriched. Among them pathways, the HIF signaling pathway had the highest enrichment score, which indicated that this pathway might be the main signaling pathway related to the treatment of hyperthyroidism by R. Scrophulariae. The integrated approach involving metabolomics and network pharmacol. revealed that R. Scrophulariae might play a role in the treatment of hyperthyroidism by regulating the “IL6-APOA1-cholesterol” pathway and disturbing the HIF signaling pathway. The results demonstrate that the combination of metabolomics and network pharmacol. could be used to reflect the effects of R. Scrophulariae on the biol. network and metabolic state of hyperthyroidism and to evaluate the drug efficacy of R. Scrophulariaceae and its related mechanisms. This study involved multiple reactions and reactants, such as 4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1Recommanded Product: 4-Hydroxy-3-methoxyphenethanol).

4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1) belongs to ethers. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Recommanded Product: 4-Hydroxy-3-methoxyphenethanol

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Synthesis and Biological Evaluation of Urea Derivatives as Highly Potent and Selective Rho Kinase Inhibitors was written by Yin, Yan;Lin, Li;Ruiz, Claudia;Khan, Susan;Cameron, Michael D.;Grant, Wayne;Pocas, Jennifer;Eid, Nibal;Park, HaJeung;Schroter, Thomas;LoGrasso, Philip V.;Feng, Yangbo. And the article was included in Journal of Medicinal Chemistry in 2013.COA of Formula: C10H15NO The following contents are mentioned in the article:

(Benzylureido)arylpyrazoles such as I [R = Me, Et, cyclopropyl, Me₂CH, HOCH₂CH₂, MeOCH₂CH₂, H₂NCH₂CH₂, Me₂NCH₂CH₂, 2-(1-pyrrolidinyl)ethyl, 3-(1-pyrrolidinyl)propyl, 2-(4-morpholinyl)ethyl, 3-(4-morpholinyl)propyl, 2-(1-piperidinyl)ethyl, 3-(1-piperidinyl)propyl; R¹ = H, MeO] were prepared to determine the relationship of structure to their inhibition of rho-associated coiled-coil protein kinase II (α) (ROCK-II). The selectivities of (benzylureido)arylpyrazoles for ROCK-II over protein kinase A, their functional activity in vitro, and their stabilities in human liver microsomes were determined The selectivities of selected (benzylureido)arylpyrazoles such as I [R = Me, HOCH₂CH₂, Me₂NCH₂CH₂, 2-(1-pyrrolidinyl)ethyl, 2-(4-morpholinyl)ethyl, 2-(1-piperidinyl)ethyl; R¹ = H, MeO] for ROCK-II over ROCK-I, JNK, and p38α, their inhibition of cytochrome P₄₅₀ isoforms 1A2, 2C9, 2D6, and 3A4, and their i.v. pharmacokinetics (clearance, volume of distribution, half-life, AUC, maximal concentration in plasma, and bioavailablity) at doses of 1 and 2 mg/kg were determined; the structures of selected compounds bound to ROCK-II were also determined by mol. docking calculations Benzylureidoarylpyrazoles lacking tertiary amino groups such as I (R = Me, HOCH₂CH₂; R¹ = H, MeO) had good pharmacokinetic properties in rats, while those possessing tertiary amino groups such as I [R = 2-(1-pyrrolidinyl)ethyl, 2-(4-morpholinyl)ethyl, 2-(1-piperidinyl)ethyl; R¹ = MeO] had poor pharmacokinetic properties in rats but good aqueous solubilities. (α-Substituted benzyl)ureidoarylpyrazoles were potent ROCK-II inhibitors with high selectivities for ROCK-II over protein kinase A and better microsomal stabilities than (benzylureido)arylpyrazoles substituted at either the urea nitrogen atoms or the central aryl ring and are potentially optimizable as ROCK-II inhibitors. This study involved multiple reactions and reactants, such as N-(3-Methoxybenzyl)ethanamine (cas: 140715-61-3COA of Formula: C10H15NO).

N-(3-Methoxybenzyl)ethanamine (cas: 140715-61-3) belongs to ethers. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.COA of Formula: C10H15NO

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Investigation of the temperature responsive behaviors of novel polyaspartamide derivatives bearing alkyl ether-type pendants was written by Zhang, Guangyan;Bao, Chenhui;Yi, Hui. And the article was included in Arabian Journal of Chemistry in 2021.Product Details of 109-85-3 The following contents are mentioned in the article:

Previous works reported that some temperature responsive polyaspartamide derivatives exhibited pH responsiveness, although pH responsive functional groups or pH-cleavable linkages were not introduced during the preparing process, which may be related to the hydroxyl groups of their pendant alkanolamide moieties. In order to investigate whether pH will also affect the temperature responsive behavior of temperature responsive polyaspartamide derivatives without hydroxyl groups, four linear alkyl ether-type amine compounds with one ether oxygen atom and 3 to 6 carbon atoms, denoted as OCx (x represents the number of carbon atoms in alkyl ether-type amine compounds), were selected for the aminolysis reaction of poly(succinimide) to design and synthesize the polyaspartamide derivatives bearing alkyl ether pendants, named PASP-OCx. The chem. structures and mol. weights of the obtained polymers were characterized and confirmed by FTIR, ¹H NMR and SEC-MALLS. The water-solubilities, surface tensions and transmittances of PASP-OCx aqueous solutions were also investigated. Results showed that PASP-OCx can be dissolved in deionized water when x is less than or equal to 5. The surface tensions of PASP-OC4 and PASP-OC5 solutions exhibited obvious turning points. Interestingly, transmittances results showed that PASP-OC5 exhibited temperature responsive behaviors under acidic, neutral or alk. conditions (pH ≤ 10.0); PASP-OC4 only exhibited temperature responsive behaviors under acidic condition (pH ≤ 3.0); while PASP-OC3 did not exhibit temperature responsive behavior. The LCST value of PASP-OC5 and PASP-OC4 can be turned by adjusting the pH value of their solutions, and decreases with decreasing the pH value. Addnl., the influence of pH on the LCST values of PASP-OC4 and PASP-OC5 was investigated by zeta potential, and the results showed that the decrease of LCST values may be due to the reducing of electrostatic repulsion with pH decreasing. Therefore, results showed that pH can also affect the temperature responsive behavior of temperature-responsive polyaspartamide derivatives that do not contain hydroxyl groups. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3Product Details of 109-85-3).

2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Product Details of 109-85-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Effect of simultaneous use of microwave and ultrasound irradiation on the sulfuric acid hydrolysis lignin depolymerization was written by Rana, Masud;Nshizirungu, Theoneste;Park, Jeong-Hun. And the article was included in Sustainable Energy & Fuels in 2022.COA of Formula: C9H12O3 The following contents are mentioned in the article:

In this study, the individual and combined effects of microwave (MW) and ultrasound (US) processes on the depolymerization of sulfuric acid hydrolysis lignin (SAHL) were investigated in a hybrid microwave-ultrasound chem. reactor. Results revealed that the combined use of MW and US processes led to better results in terms of high yields of bio-oil and monomer production (43.01 and 6.69 wt%), as compared to the individual use of MW (32.83 and 4.71 wt%) and US (21.60 and 3.58 wt%) processes. The highest yield of bio-oil (63.50 wt%), which contained 13.04 wt% monomers, was achieved under the optimized reaction conditions of 180°C, 80 min, 30% US frequency and a 1,4-dioxane to formic acid ratio of 250 : 50 (volume/volume). Process parameters such as temperature, time and the content of formic acid added to 1,4-dioxane were chosen carefully and optimized using response surface methodol. (RSM). The results of the statistical anal. of variance (ANOVA) showed that the depolymerization temperature and time significantly affected (ρ < 0.05) the yield of bio-oil. In the liquid products, the compounds guaiacol (G1), ethanone, 1-(4-hydroxy-3-methoxyphenyl)-(G3), 2-(4-hydroxy-3-methoxyphenyl)acetaldehyde (G10), 4-Et phenol (H1), 4-Me phenol (H4), and di-Bu phthalate (DBPH) were produced as major monomers. Meanwhile, the GPC results showed that the mol. weight of SAHL (Mw = ∼2156) was significantly reduced to lower mol. weight compounds (Mw = 638). The findings obtained from this study suggest that the applied MW-US-assisted lignin depolymerization process could be a promising alternative to the sep. use of the MW or US process and can pave the way to continue advancing the lignin conversion practices as a renewable and sustainable resource of aromatic chems. Moreover, the proposed method is believed to possess great potential for conversion of a major waste stream from a pulp industry into aromatic chem. production Future work will be directed toward the simultaneous use of MW-US-assisted depolymerization of lignin in a continuous flow process mimicking the optimized conditions obtained under batch MW-US conditions. This study involved multiple reactions and reactants, such as 4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1COA of Formula: C9H12O3).

4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1) belongs to ethers. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.COA of Formula: C9H12O3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Structure-Guided Discovery of Silicon-Containing Subnanomolar Inhibitor of Hydroxyphenylpyruvate Dioxygenase as a Potential Herbicide was written by Qu, Ren-Yu;Nan, Jia-Xu;Yan, Yao-Chao;Chen, Qiong;Ndikuryayo, Ferdinand;Wei, Xue-Fang;Yang, Wen-Chao;Lin, Hong-Yan;Yang, Guang-Fu. And the article was included in Journal of Agricultural and Food Chemistry in 2021.Electric Literature of C3H9NO The following contents are mentioned in the article:

4-Hydroxyphenylpyruvate dioxygenase (HPPD, EC 1.13.11.27) has been recognized as one of the most promising targets in the field of herbicide innovation considering the severity of weed resistance currently. In a persistent effort to develop effective HPPD-inhibiting herbicides, a structure-guided strategy was carried out to perform the structural optimization for triketone-quinazoline-2,4-diones, a novel HPPD inhibitor scaffold first discovered in our laboratory Herein, starting from the crystal structure of Arabidopsis thaliana (At)HPPD complexed with 6-(2-hydroxy-6-oxocyclohex-1-ene-1-carbonyl)-1,5-dimethyl-3-(o-tolyl)quinazoline-2,4(1H,3H)-dione (MBQ), three subseries of quinazoline-2,4-dione derivatives were designed and prepared by optimizing the hydrophobic interactions between the side chain of the core structure at the R¹ position and the hydrophobic pocket at the active site entrance of AtHPPD. 6-(2-Hydroxy-6-oxocyclohex-1-ene-1-carbonyl)-1,5-dimethyl-3-(3-(trimethylsilyl)prop-2-yn-1-yl)quinazoline-2,4(1H,3H)-dione (I) with the best inhibitory activity against AtHPPD was identified to be the first subnanomolar-range AtHPPD inhibitor (K_i = 0.86 nM), which significantly outperformed that of the lead compound MBQ (K_i = 8.2 nM). Further determination of the crystal structure of AtHPPD in complex with compound 60 (1.85 Å) and the binding energy calculation provided a mol. basis for the understanding of its high efficiency. Addnl., the greenhouse assay indicated that 6-(2-hydroxy-6-oxocyclohex-1-ene-1-carbonyl)-1,5-dimethyl-3-propylquinazoline-2,4(1H,3H)-dione (II) and compound I showed acceptable crop safety against peanut and good herbicidal activity with a broad spectrum. Moreover, compound II also showed superior selectivity for wheat at the dosage of 120 g ai/ha and favorable herbicidal efficacy toward the gramineous weeds at the dosage of as low as 30 g ai/ha. We believe that compounds II and I have promising prospects as new herbicide candidates for wheat and peanut fields. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3Electric Literature of C3H9NO).

2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Electric Literature of C3H9NO

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Nonionic Water-Soluble Polysilynes. Synthesis and Properties of a Novel Class of Functionalized Materials was written by Cleij, Thomas J.;Tsang, Stellar K. Y.;Jenneskens, Leonardus W.. And the article was included in Macromolecules in 1999.Name: 2-(2-(Hexyloxy)ethoxy)ethanol The following contents are mentioned in the article:

The nonionic water-soluble polysilynes poly(4,7,10-trioxaundecylsilyne) (I) and poly(4,7,10,13-tetraoxatetradecylsilyne) (II), which are inaccessible using the conventional Wurtz-type coupling with Na in refluxing toluene, were prepared in reasonable yields using graphite potassium C₈K as the reducing agent in THF at 0 °C. A water-insoluble analog of I, viz. poly(4,7,10-trioxahexadecylsilyne) (III), is obtained in nearly quant. yield under similar conditions. Despite the fact that I and II possess all the characteristic polysilylene-like (photo)phys. properties, aqueous solutions of I and II unexpectedly exhibit thermoresponsive behavior; i.e., at 49 °C a lower critical solution temperature (LCST) is found. The presence of an LCST, which has to originate from folding/unfolding processes of the polysilylene backbone, suggests that polysilynes have a hybrid structure with a predominantly one-dimensional overall appearance consisting of linear fragments with small branches and/or incorporated (branched) cyclics, instead of the previously proposed extended sheetlike and/or hyperbranched/dendritic structures. Addnl. support for a hybrid structure was given by semiempirical PM3 calculations on a variety of oligomeric model compounds The PM3 results suggest that Si-Cl moieties incorporated in oligomers will be more reactive than monomeric Si-Cl groups. The calculations further indicate that linear chain extension is preferred over branching. Cyclic voltammetry in combination with absorption/excitation spectroscopy reveals that in going from the related polysilane to the polysilylene the valence band edge shifts ca. -0.7 V, while the conduction band edge remains virtually unchanged. Furthermore, it is demonstrated that polysilynes I and II are effective photoinitiators for radical polymerizations upon excitation at λ 400 nm. This is exemplified for the conversion of Me acrylate into poly(Me acrylate). This study involved multiple reactions and reactants, such as 2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4Name: 2-(2-(Hexyloxy)ethoxy)ethanol).

2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Name: 2-(2-(Hexyloxy)ethoxy)ethanol

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Curcumae rhizoma and its major constituents against hepatobiliary disease: Pharmacotherapeutic properties and potential clinical applications was written by Gao, Tian-Hui;Liao, Wan;Lin, Li-Ting;Zhu, Zong-Ping;Lu, Mei-Gui;Fu, Chao-Mei;Xie, Tian. And the article was included in Phytomedicine in 2022.Safety of Bisdemethoxycurcumin The following contents are mentioned in the article:

Hepatobiliary disease currently serves as an urgent health issue in public due to health-modulating factors such as extension of life expectancy, increasingly sedentary lifestyles and over-nutrition. A definite treatment remains lacking owing to different stages of the disease itself and its intricate pathogenesis. Traditional Chinese medicine (TCM) has been gradually popularized in clinic with the satisfactory efficacy and good safety. Curcumae Rhizoma (called E Zhu, EZ in Chinese) is a representative herb, which has been used to treat hepatobiliary disease for thousands of years. To systematically summarize the recent research advances on the pharmacol. activities of EZ and its constituents, explain the underlying mechanisms of preventing and treating hepatobiliary diseases, and assess the shortcomings of existing work. Besides, ethnopharmacol., phytochems., and toxicol. of EZ have been researched. The information about EZ was collected from various sources including classic books about Chinese herbal medicine, and scientific databases including Web of Science, PubMed, ScienceDirect, Springer, ACS, SCOPUS, CNKI, CSTJ, and WANFANG using keywords given below and terms like pharmacol. and phytochem. details of this plant. The chem. constituents isolated and identified from EZ, such as terpenoids including β-elemene, furanodiene, germacrone, etc. and curcuminoids including curcumin, demethoxycurcumin, bisdemethoxycurcumin, etc. prove to have hepatoprotective effect, anti-liver fibrotic effect, anti-fatty liver effect, anti-liver neoplastic effect, and cholagogic effect through TGF-β1/Smad, JNK1/2-ROS, NF-κB and other anti-inflammatory and antioxidant signaling pathways. Also, EZ is often combined with other Chinese herbs in the treatment of hepatobiliary diseases with good clin. efficacy and no obvious adverse reactions. It provides a preclin. basis for the efficacy of EZ as an effective therapeutic agent for the prevention and treatment of hepatobiliary diseases. Even so, the further studies still needed to alleviate hepatotoxicity and expand clin. application. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0Safety of Bisdemethoxycurcumin).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Safety of Bisdemethoxycurcumin

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Impact of Conventional and Sustainable Solvents on the Yield, Selectivity, and Recovery of Curcuminoids from Turmeric was written by Kisanthia, Rattikon;Hunt, Andrew J.;Sherwood, James;Somsakeesit, La-or;Phaosiri, Chanokbhorn. And the article was included in ACS Sustainable Chemistry & Engineering in 2022.COA of Formula: C19H16O4 The following contents are mentioned in the article:

Extraction of pharmaceutically important curcuminoid platform mols. has been achieved from turmeric with ultrasound-assisted greener solvent extraction, demonstrating excellent performance and product recovery. Extraction of curcuminoids from turmeric was undertaken with both conventional and potentially bio-based solvents. Sustainable solvents, namely, Et acetate, ethanol, Cyrene, and deep eutectic solvent (DES-B5, 1:6 ChCl:1,4-butanediol) demonstrated high extraction yields of curcuminoids, including 24.36 ± 3.10, 25.30 ± 4.58, 23.51 ± 2.56, and 27.40 ± 3.80 mg/g of curcumin, resp. In contrast, curcumin extracted in lower polarity solvents such as hexane, toluene, and tetramethyloxolane was low at less than 7.0 mg/g, whereas 2-MeTHF, DMF, and THF represented moderate extraction yields of 13.80 ± 3.90, 14.43 ± 4.46, and 15.17 ± 2.08 mg/g, resp. DES-B5 with 10% water extracted the greatest yield of curcumin (46.70 ± 0.55 mg/g), bisdemethoxycurcumin (46.14 ± 0.82 mg/g), and demethoxycurcumin (10.63 ± 0.35 mg/g), followed by a simple and low energy product recovery method through the addition of water and precipitation COSMOtherm calculations suggested that the extraction efficiency was related to solvent interactions with the cell walls of the biomass, rather than the solubility of the curcuminoids. In addition, the application of ultrasound in extraction in combination with DES-B5 enabled the strong destruction of the plant matrix that was confirmed by SEM. The sustainability, efficiency, and toxicity of the proposed extraction methodologies were evaluated through the CHEM21 green metrics toolkit. The methods utilizing ethanol, Et acetate, and Cyrene in this work demonstrate a significant improvement over those previously published by 3-10 times of process mass intensity total, and DES-B5 also performed well under the green metrics assessment. Because of its high yields, low toxicity, being a bio-based solvent, inexpensive, and readily available, DES-B5 with 10% water is recommended as the greenest solvent for curcuminoid extraction under ultrasonication. This study involved multiple reactions and reactants, such as Bisdemethoxycurcumin (cas: 33171-05-0COA of Formula: C19H16O4).

Bisdemethoxycurcumin (cas: 33171-05-0) belongs to ethers. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.COA of Formula: C19H16O4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Evaluation of analyte protectants to improve gas chromatographic analysis of pesticides was written by Anastassiades, Michelangelo;Mastovska, Katerina;Lehotay, Steven J.. And the article was included in Journal of Chromatography A in 2003.Reference of 112-59-4 The following contents are mentioned in the article:

A common problem in gas chromatog. (GC) applications is the analyte losses and/or peak tailing due to undesired interactions with active sites in the inlet and column. Analytes that give poor peak shapes or degrade have higher detection limits, are more difficult to identify and integrate, and are more prone to interferences than stable analytes that give narrow peaks. For susceptible analytes, significant peak quality improvements are obtained when matrix components are present because they fill active sites, thus reducing analyte interactions. This phenomenon is called “matrix-induced chromatog. response enhancement”. Several approaches have been proposed to minimize peak distortion phenomena and compensate for matrix-induced effects, which is especially important for accurate quantitation, but each approach has serious limitations for routine multi-pesticide anal. In this study, we demonstrate the feasibility of using “analyte protectants” to provide a more convenient and effective solution to the problem than other approaches developed thus far. The protecting agents are added to extracts and matrix-free standards alike to provide the chromatog. enhancement effect even for the most susceptible analytes in a very dirty GC system. We evaluated 93 compounds to find the most suitable ones for improving chromatog. quality of the signal. Because hydrogen bonding has been shown to be an important factor in analyte interactions with active sites, we mainly focused on additives with strong hydrogen bonding capabilities. Dramatic peak enhancements were achieved using compounds containing multiple hydroxy groups, such as sugars and sugar derivatives, and gulonolactone appears to be the most effective protecting agent for the most pesticides that we tested. The benefits of using analyte protectants vs. alternative procedures for overcoming matrix-induced effects in quantitation include: (a) simpler procedure; (b) easier integration of peaks; (c) lower detection limits; (d) better quantitation; (e) less maintenance of the GC inlet; and (e) lower cost. This study involved multiple reactions and reactants, such as 2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4Reference of 112-59-4).

2-(2-(Hexyloxy)ethoxy)ethanol (cas: 112-59-4) belongs to ethers. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Reference of 112-59-4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Reactions with halogen-substituted xanthones. II was written by Mustafa, Ahmed;Asker, Wafia;Sobhy, Mohamed Ezz El-Din. And the article was included in Journal of the American Chemical Society in 1955.Product Details of 100927-02-4 The following contents are mentioned in the article:

The reduction of halogen-substituted xanthones with LiAlH₄ and with metallic Na and EtOH led to the formation of xanthene (I) with loss of the halogen. The reduction of xanthone (II) to I with LiAlH₄ is discussed. 1-Chloro-(III), 1-6-dichloro-4-methylxanthone (IV), and 1-chloro-4-methylthiaxanthone (V) condense with aromatic thiols in the presence of KOH to yield the corresponding arylmercapto derivatives which are oxidized readily to the corresponding sulfone derivatives Whereas 2-chloroxanthone (VI) undergoes a photochem. addition reaction with I in sunlight to give the carbinol VII, the 4-isomer (VIII) of VI effects the photochem. dehydrogenation of I to 9,9′-bixanthene (IX). 2-Chloro-9-phenylxanthone (X) undergoes a photochem. oxidation in sunlight in the presence of O, yielding the peroxide (XI) of X. VI (1 g.) in 30 cc. C₆H₆ added in portions to 0.7 g. LiAlH₄ in 50 cc. Et₂O, the mixture refluxed 3 h., kept at room temperature overnight, and treated with cold dilute HCl, the Et₂O layer worked up, and the solid residue washed with about 40 cc. petr. ether and recrystallized from MeOH gave almost quant. I. The 4-isomer (XII) and the 2-Br (XIII) and 4-Br (XIV) analogs of VI gave identical results. III (1 g.) treated with LiAlH₄ in the usual manner, the mixture refluxed 2 h., decomposed with about 100 cc. cold saturated aqueous NH₄Cl, and extracted with Et₂O, the extract dried and evaporated, and the solid residue recrystallized from C₆H₆ and light petr. yielded about 0.73 g. 1-chloro-4-methylxanthydrol, colorless crystals, m. 170° (yellow melt). VI, XII, XIII, and XIV (1 g. each) in 25 cc. hot absolute EtOH added dropwise to 1 g. molten metallic Na by the method of Heller and Kostanecki (C.A. 2, 2243), the mixture steam distilled, and the resulting solid recrystallized from MeOH gave an almost quant. yield of I, m. 101°, in each case. III, IV, V (2 g. each) and 1.5 g. of the appropriate thiol in 25 cc. AmOH treated with 0.1 g. solid KOH, the mixture refluxed 3 h., held at room temperature overnight, and filtered, the filter residue washed with cold EtOH, H₂O, and cold Me₂CO, and extracted with about 60 cc. ligroine (b. 60-80°), and the residue crystallized from glacial AcOH gave the corresponding 1-arylmercapto-4-methylxanthones and -thiaxanthones. In this manner were obtained the following compounds (m.p. and % yield given): 1-(o-tolylmercapto)4-methylxanthones (XV), 170°, 52; the m-isomer, 163°, 58; the p-isomer of XV, 166°, 73; 1-phenylmercapto-6-chloro-4-methylxanthone (XVI), 164°, 81; the o-Me derivative of XVI, 205°, 62; m-Me derivative of XVI, 140°, 58; p-Me derivative of XVI, 180°, 78; 1-phenylmercapto-4-methylthiaxanthone (XVII), 150°, 83°; o-Me derivative of XVII, 162°, 64; m-Me derivative of XVII, 140°, 61; p-Me derivative of XVII, 164°, 84; all compounds formed yellow crystals and gave an orange-red color with H₂SO₄. The appropriate arylmercapto-4-methylxanthone or -thiaxanthone (1 g.) in 25 cc. glacial AcOH treated with 5 cc. 30% H₂O₂, the mixture heated 1 h. on the steam bath and held at room temperature overnight, and the resulting crystallized deposit recrystallized from glacial AcOH gave the corresponding sulfones (mercapto compound used, m.p., and % yield given): XV, 260°, 63; m-isomer of XV, 226°, 61; p-isomer of XV, 270°, 76; XVI, 210-12°, 84; o-Me derivative of XVI, 242°, 73; m-Me derivative of XVI, 198°, 69; p-Me derivative of XVI, 240°, 79; XVII, 176°, 82; o-Me derivative of XVII, 180°, 75; m-Me derivative of XVII, 182°, 70; p-Me derivative of XVIII, 210°, 85. I (1 g.) and 1.3 g. VI in 30 cc. C₆H₆ exposed 10 days (May) to sunlight and the resulting colorless needles washed with about 10 cc. C₆H₆ and recrystallized from hot C₆H₆ yielded about 80% VII, m. 174°; it dissolved with difficulty with an orange color in concentrated H₂SO₄. VIII (0.7 g.) and 0.5 g. I in 25 cc. C₆H₆ exposed 10 days (July) to sunlight, the C₆H₆ removed in vacuo, the oily residue cooled, and the semisolid mass washed with about 25 cc. petr. ether (b. 50-60°) and recrystallized from C₆H₆ yielded about 0.32 g. IX, m. 201°. The Grignard solution from 0.9 g. Mg and 9 g. PhBr in 50 cc. dry Et₂O treated with 1 g. VI in 50 cc. dry C₅H₆, the Et₂O evaporated, the residual mixture heated 1 h. on the steam bath, kept at 25° overnight, and poured slowly into 100 cc. saturated aqueous NH₄Cl, the Et₂O layer dried, filtered, and evaporated, the oily residue washed with about 35 cc. petr. ether below 40°, and the resulting solid crystallized from ligroine gave about 0.87 g. 2-chloro-9-phenylxanthydrol, m. 113°; it gave an orange color with H₂SO₄; it gave reduced with Zn dust and AcOH almost 100% X, colorless crystals, m. 139° (from EtOH). X (1 g.) in solution exposed 15 days (Apr.) to sunlight gave about 0.63 g. XI, m. 221° (decomposition) (brown-red melt); it gave an orange-yellow color with H₂SO₄. XI (0.5 g.) heated 0.5 h. at 270° yielded 0.18 g. xanthone. This study involved multiple reactions and reactants, such as 4-(Benzyloxy)-3-methylphenol (cas: 100927-02-4Product Details of 100927-02-4).

4-(Benzyloxy)-3-methylphenol (cas: 100927-02-4) belongs to ethers. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Product Details of 100927-02-4

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem