Category: ethers-buliding-blocks

《Compatibility study of four binary combinations of active ingredients for dermal film forming systems》 was published in Farmacia (Bucharest, Romania) in 2020. These research results belong to Rusu, Aura; Ciurba, Adriana; Birsan, Magdalena; Antonoaea, Paula; Szekely-Szentmiklosi, Blanka; Fulop, Ibolya; Pascu, Giorgiana-Andreea; Todoran, Nicoleta. Safety of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid The article mentions the following:

Adapalene (ADA), levofloxacin (LEV), meloxicam (MEL) and miconazole nitrate (MIC) were selected as potential active ingredients for film systems with dermal or transdermal delivery. This study aimed to evaluate the compatibility of four binary mixtures – ADA and LEV (M1), ADA and MIC (M2), LEV and MEL (M3), and LEV and MIC (M4) – combinations for new bioadhesive polymeric matrix dermal systems produced by the casting solvent evaporation technique. The Fourier-transform IR spectroscopy (FTIR), differential scanning calorimetry (DSC) and mol. modeling (MM) were used to characterize and evaluate the compatibility between the selected active substances. In the FTIR data, M1, M2, and M4 mixtures presented a good compatibility. DSC revealed different chem. interactions as the temperature rose above 160°C, especially for M3 and M4. Through MM technique, interactions were found on the M2 and M3 mixtures Following the correlation of all obtained results, the best compatibility was found to be on M1 and M4 combinations. The experimental part of the paper was very detailed, including the reaction process of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas: 106685-40-9Safety of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid)

6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas:106685-40-9) may be used as a pharmaceutical reference standard for the quantification of the analyte in topical gel formulations using high-performance liquid chromatography technique.Safety of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid

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

The author of 《A signal-on detection of organophosphorus pesticides by fluorescent probe based on aggregation-induced emission》 were Cai, Yue; Fang, Jingkun; Wang, Bingfeng; Zhang, Fangshuai; Shao, Guang; Liu, Yingju. And the article was published in Sensors and Actuators, B: Chemical in 2019. Reference of Bis(4-methoxyphenyl)amine The author mentioned the following in the article:

Organophosphorus pesticides (OPs) have been broadly used in agriculture because of their high insecticidal efficiency. However, most OPs are highly toxic, since they can irreversibly inhibit acetylcholinesterase (AChE), leading to the neurotransmitter acetylcholine disorder which triggers a series of neurol. diseases, and even death. Therefore, the rapid and sensitive detection of OPs is of great significance to life health and environmental protection. In this work, new derivatives of tetraphenylethene (TPE) with one or two aldehyde groups were synthesized and characterized, showing that they exhibited different aggregation-induced emission (AIE) effects in different pH solutions Especially, the hydrolysis product of acetylthiocholine iodide (ATCh) catalyzed by acetylcholinesterase (AChE) can influence the pH of solution, causing the protonation of TPE-1 and changing its fluorescent intensity. Considering that the AChE activity can be specifically inhibited by OPs, the proposed TPE-1 was used to detect OPs between 0.009 and 22.5 mg/L with a detection limit of 0.008 mg/L. In addition, the selectivity was acceptable, providing a possible application for the detection of OPs. After reading the article, we found that the author used Bis(4-methoxyphenyl)amine(cas: 101-70-2Reference of Bis(4-methoxyphenyl)amine)

Bis(4-methoxyphenyl)amine(cas: 101-70-2) is a diphenylamine derivative used as a chemical additive for cured rubber.Bis(4-methoxyphenyl)amine is highly toxic and may potentially induce chromosome abberation.Reference of Bis(4-methoxyphenyl)amine

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

The author of 《Synthesis and characterization of a magnetic graphene oxide/Zn-Ni-Fe layered double hydroxide nanocomposite: An efficient mesoporous catalyst for the green preparation of biscoumarins》 were Zeynizadeh, Behzad; Gilanizadeh, Masumeh. And the article was published in New Journal of Chemistry in 2019. Related Products of 135-02-4 The author mentioned the following in the article:

In this study, a nanocomposite of Fe3O4@GO@Zn-Ni-Fe-layered double hydroxide was synthesized as a novel and efficient mesoporous magnetic nanocatalyst. The synthesis was carried out via the immobilization of Fe3O4 MNPs (magnetic nanoparticles) on graphene oxide and then the layering of Zn-Ni-Fe-layered double hydroxide moieties on the constituents of Fe3O4@GO. The magnetic graphene oxide/layered double hydroxide system was then characterized using SEM, EDX, FTIR, XRD, TEM and VSM analyses. The catalytic activity of the prepared composite system was further studied towards one-pot Knoevenagel-Michael reaction of aromatic aldehydes with 4-hydroxycoumarin in water. All reactions were carried out under reflux conditions, giving biscoumarin materials I (R = H, 4-Me, 2-MeO, 2,4-Cl2, 4-CHO, etc.) in 87-95% yields within 3-40 min. This method has noteworthy advantages in terms of mild reaction conditions, short reaction times, utilizing water as an environmental friendly solvent and applying a magnetically separable catalyst system. After reading the article, we found that the author used 2-Methoxybenzaldehyde(cas: 135-02-4Related Products of 135-02-4)

2-Methoxybenzaldehyde(cas: 135-02-4) is used as a flavor agent in foods including nonalcoholic/alcoholic beverages, baked goods, chewing gum, confections, frozen dairy, fruit ices, hard/soft candy, instant coffee, tea, Jams, jellies, and milk products. It also has been used to obtain good enantioselectivities using Cu(OAc)(2)-bis(oxazolines) via hydrogen bonding in asymmetric Henry reaction.Related Products of 135-02-4

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

The author of 《Evaluating liver uptake and distribution of different poly(2-methyl-2-oxazoline) modified lysine dendrimers following intravenous administration》 were England, Richard M.; Moss, Jennifer I.; Hill, Kathryn J.; Elvevold, Kjetil; Smedsroed, Bard; Ashford, Marianne B.. And the article was published in Biomaterials Science in 2019. COA of Formula: C28H28O3 The author mentioned the following in the article:

We report on the synthesis of four poly(2-methyl-2-oxazoline) modified lysine dendrimers with different residual groups or modifications on the dendrimer core, including: amino groups (pos. charge), carboxyl groups (neg. charge), and two drug mols., one of which has a high log P. We looked at the in vivo distribution amongst three main liver cell types: hepatocytes, liver sinusoidal endothelial cells (LSECs) and Kupffer cells (KCs) and found differences in cell distribution and uptake concentrations dependent on these residual groups. In particular, the amino-functional polymer showed greater uptake by the hepatocytes while the carboxyl-functionalised polymer exhibited greater uptake by KCs and LSECs. These findings provide insight into which professional scavenger cells of the liver remove these types of nanoparticles from the bloodstream and we describe some of the design criteria to consider when creating novel drug delivery systems. In the experimental materials used by the author, we found 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas: 106685-40-9COA of Formula: C28H28O3)

6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas:106685-40-9) is a third-generation synthetic retinoid and a highly lipophilic compound derived from naphthoic acid. It is widely used in the treatment of acne.COA of Formula: C28H28O3

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

The author of 《The experimental study on the influence of crown ethers and glycols on the mutual solubility of lithium bromide in water》 were Krolikowska, Marta; Romanska, Katarzyna. And the article was published in Fluid Phase Equilibria in 2019. Reference of 1,4,7,10,13-Pentaoxacyclopentadecane The author mentioned the following in the article:

In this paper the continuation of our work on searching for anti crystallization additives to the aqueous solution of lithium bromide is presented. This type of research is important from the viewpoint of absorption refrigeration technol. to improve the performance of the efficiency of refrigeration equipment. In this study three crown ethers 12-crown-4 15-crown-5 and 18-crown-6 as well as the glycols ethylene glycol diethylene glycol triethylene glycol and glycerol were investigated as anti crystallization additives for lithiumbromide in water system, conventionally used as a working pair in absorption refrigeration technol. For this purpose the solubility of lithium bromide in water has been detected in the presence of the organic additive. The solubility measurements have been carried out using a dynamic method at a wide temperature and comparision range for different additive to LiBr initial mass fraction from 0.1 0.2 and 0.3. From exptl. SLE data the comparison range of the liquid state for tested systems at the absorbers working temperature was detected and compared to those from conventional LiBr in water system. Further measurements of vapor liquid equillibrium will be performed to select the best anti crystalization additive. In the part of experimental materials, we found many familiar compounds, such as 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Reference of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Reference of 1,4,7,10,13-Pentaoxacyclopentadecane

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

Ren, Huimin; Liu, Chao; Ding, Xu; Fu, Xianzhang; Wang, Hailong; Jiang, Jianzhuang published an article on February 1 ,2022. The article was titled 《High Fluorescence Porous Organic Cage for Sensing Divalent Palladium Ion and Encapsulating Fine Palladium Nanoparticles》, and you may find the article in Chinese Journal of Chemistry.Electric Literature of C12H10O2 The information in the text is summarized as follows:

Comprehensive Summary : Porous organic cages (POCs) as an innovative type of porous mol. materials enable multifunctional applications. Herein, a fluorescence POC (denoted as 1) has been constructed by means of 5,5′-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))diisophthalaldehyde condensing with cyclohexanediamine enantiomer with the aid of trifluoroacetic acid. 1 exhibits the permanent void and prominent fluorescence with relative quantum yield of 73% confirmed by gas sorption and emission experiments, resp. Moreover, this organic cage is capable of sensing diavalent Pd2+ according to the fluorescence response to the addition of various metal ions. The dispersion of 1 in methanol containing palladium acetate was stirred at 25 °C and then 80 °C to reduce Pd2+ ions into nanoparticles (NPs), leading to the composite (Pd@1) composed of fine Pd NPs with the size of ca. 1.8 nm. The catalytic nature of Pd@1 over NaBH4 promoted the degeneration of nitrobenzene and congo red. This work introduces one new case of POCs with versatile properties and functions, including ion fluorescence recognition, fine Pd NPs stabilizer, and gas adsorption, enriching the family of POC-based materials. In the experiment, the researchers used 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Electric Literature of C12H10O2)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Oxygen is more electronegative than carbon, thus the alpha hydrogens of ethers are more acidic than those of simple hydrocarbons. Electric Literature of C12H10O2 They are far less acidic than alpha hydrogens of carbonyl groups (such as in ketones or aldehydes), however.

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

In 2019,Organic & Biomolecular Chemistry included an article by Takagi, Mio; Watanabe, Ayako; Murata, Shigeo; Takita, Ryo. Formula: C7H7IO. The article was titled 《Copper-catalyzed arene amination in pure aqueous ammonia》. The information in the text is summarized as follows:

A simple protocol for copper-catalyzed arene amination using aqueous ammonia without any addnl. ligands and organic coordinating solvents has been developed. The reaction pathway via a Cu(I)/Cu(III) mechanism is proposed based on the results of control experiments as well as DFT calculations After reading the article, we found that the author used 1-Iodo-2-methoxybenzene(cas: 529-28-2Formula: C7H7IO)

1-Iodo-2-methoxybenzene(cas: 529-28-2) is a useful synthetic intermediate. It can be used in the synthesis of piperidinyl diaminopyrimidines as cyclin-dependent kinase inhibitors with antitumor activity and polysubstituted benzofuran derivatives as novel inhibitors of parasitic growth.Formula: C7H7IO

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

In 2019,Advanced Synthesis & Catalysis included an article by Kim, Seongwoo; Kim, Youngik; Jin, Hyomin; Park, Myung Hwan; Kim, Youngjo; Lee, Kang Mun; Kim, Min. Computed Properties of C8H8O2. The article was titled 《Europium-catalyzed aerobic oxidation of alcohols to aldehydes/ketones and photoluminescence tracking》. The information in the text is summarized as follows:

Europium-catalyzed aerobic oxidation of alcs. to aldehydes/ketones with external catalytic oxidants utilizing the redox cycle of Eu2+/Eu3+ was developed. The oxidation reaction was performed under mild conditions and it showed good substrate tolerance. The photoluminescence spectra clearly demonstrated the oxidation state changes that occur during the presented europium-catalyzed aerobic oxidation In the experiment, the researchers used 2-Methoxybenzaldehyde(cas: 135-02-4Computed Properties of C8H8O2)

2-Methoxybenzaldehyde(cas: 135-02-4) is used as a flavor agent in foods including nonalcoholic/alcoholic beverages, baked goods, chewing gum, confections, frozen dairy, fruit ices, hard/soft candy, instant coffee, tea, Jams, jellies, and milk products. It also has been used to obtain good enantioselectivities using Cu(OAc)(2)-bis(oxazolines) via hydrogen bonding in asymmetric Henry reaction.Computed Properties of C8H8O2

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

In 2019,Molecules (Basel, Switzerland) included an article by Chen, Ichen; Xu, Chenxi; Peng, Jing; Han, Dong; Liu, Siqi; Zhai, Maolin. Electric Literature of C10H20O5. The article was titled 《Novel Functionalized Cellulose Microspheres for Efficient Separation of Lithium Ion and Its Isotopes: Synthesis and Adsorption Performance.》. The information in the text is summarized as follows:

The adsorption of lithium ions(Li+) and the separation of lithium isotopes have attracted interests due to their important role in energy storage and nuclear energy, respectively. However, it is still challenging to separate the Li+ and its isotopes with high efficiency and selectivity. A novel cellulose-based microsphere containing crown ethers groups (named as MCM-g-AB15C5) was successfully synthesized by pre-irradiation-induced emulsion grafting of glycidyl methacrylate (GMA) and followed by the chemical reaction between the epoxy group of grafted polymer and 4′-aminobenzo-15-crown-5 (AB15C5). By using MCM-g-AB15C5 as adsorbent, the effects of solvent, metal ions, and adsorption temperature on the adsorption uptake of Li+ and separation factor of 6Li/7Li were investigated in detail. Solvent with low polarity, high adsorption temperature in acetonitrile could improve the uptake of Li+ and separation factor of lithium isotopes. The MCM-g-AB15C5 exhibited the strongest adsorption affinity to Li+ with a separation factor of 1.022 ± 0.002 for 6Li/7Li in acetonitrile. The adsorption isotherms in acetonitrile is fitted well with the Langmuir model with an ultrahigh adsorption capacity up to 12.9 mg·g-1, indicating the unexpected complexation ratio of 1:2 between MCM-g-AB15C5 and Li+. The thermodynamics study confirmed the adsorption process is the endothermic, spontaneous, and chemisorption adsorption. As-prepared novel cellulose-based adsorbents are promising materials for the efficient and selective separation of Li+ and its isotopes. In the experiment, the researchers used many compounds, for example, 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Electric Literature of C10H20O5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Electric Literature of C10H20O5

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

In 2018,Yao, Hong; Wei, Guoxiang; Liu, Yanpeng; Yao, Hequan; Zhu, Zheying; Ye, Wencai; Wu, Xiaoming; Xu, Jinyi; Xu, Shengtao published 《Synthesis, Biological Evaluation of Fluorescent 23-Hydroxybetulinic Acid Probes, and Their Cellular Localization Studies》.ACS Medicinal Chemistry Letters published the findings.COA of Formula: C9H19NO4 The information in the text is summarized as follows:

23-Hydroxybetulinic acid (23-HBA) is a complex lupane triterpenoid, which has attracted increasing attention as an anticancer agent. However, its detailed mechanism of anticancer action remains elusive so far. To reveal its anticancer mode of action, a series of fluorescent 23-HBA derivatives conjugated with coumarin dyes were designed, synthesized, and evaluated for their antiproliferative activities. Subcellular localization and uptake profile studies of representative fluorescent 23-HBA probe 26c were performed in B16F10 cells, and the results suggested that probe 26c was rapidly taken up into B10F10 cells in a dose-dependent manner and mitochondrion was the main site of its accumulation. Further mode of action studies implied that the mitochondrial pathway was involved in 23-HBA-mediated apoptosis. Together, our results provided new clues for revealing the mol. mechanism of natural product 23-HBA for its further development into an antitumor agent. In the experimental materials used by the author, we found tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6COA of Formula: C9H19NO4)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. COA of Formula: C9H19NO4

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