Author: Jessica.F

《Propylsulfonic acid grafted on mesoporous siliceous FDU-5 material: A high TOF catalyst for the synthesis of coumarins via Pechmann condensation》 was published in Microporous and Mesoporous Materials in 2020. These research results belong to Gonzalez-Carrillo, Gabino; Gonzalez, Jorge; Emparan-Legaspi, Maria Jose; Lino-Lopez, Gisela Jareth; Aguayo-Villarreal, Ismael A.; Ceballos-Magana, Silvia G.; Martinez-Martinez, Francisco J.; Muniz-Valencia, Roberto. Application In Synthesis of m-Methoxyphenol The article mentions the following:

In this sense, the use of propylsulfonic acid supported in FDU-5 (FDU-5-Pr-SO3H) as a catalyst for the synthesis of coumarins I (R1 = 7-OH, 5-Me-7-OH, 7,8-OH2, 7-OMe; R2 = Me, Ph) and 4-methyl-2H-benzo[h]chromen-2-one via Pechmann condensation in solvent-free medium was investigated. FDU-5-Pr-SO3H was synthesized by co-condensation of MPTES and TEOS. FDU-5-Pr-SO3H was used as catalyst for the synthesis of 7-hydroxy-4-methylcoumarin and their reaction conditions were optimized. The optimization process involved the study of the influence of the catalyst load, Resorcinol:EAA molar ratio, reaction temperature and reaction time. The optimal conditions were: catalyst load of 1.65 mol%, reactants molar ratio of 1:1.5, temperature 130°C and 60 min of reaction time. Under these conditions, the FDU-5-Pr-SO3H material showed excellent yield (96.5%) and turn over frequency (59 h-1). Finally, the synthesized material was assessed as a catalyst with other phenolic compounds and Et acetoacetate and with Et benzoylacetate. The obtained products were isolated and identified by comparison of their spectral data with those reported in literature; from these results, it can be concluded that the catalyst is active with a wide range of phenolic substrates. The experimental part of the paper was very detailed, including the reaction process of m-Methoxyphenol(cas: 150-19-6Application In Synthesis of m-Methoxyphenol)

m-Methoxyphenol(cas: 150-19-6) may be used in synthesis of:C(4) symmetric calix[4]resorcinarene, 2-nitroso-5-methoxyphenol, 6-methoxy-2(3H)-benzoxazoloneApplication In Synthesis of m-Methoxyphenol

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

《Electrolyte additives to enable nonaqueous polyelectrolyte solutions for lithium ion batteries》 was published in Molecular Systems Design & Engineering in 2020. These research results belong to Diederichsen, Kyle M.; McCloskey, Bryan D.. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane The article mentions the following:

Nonaqueous polyelectrolyte solutions, in which a neg. charged macromol. neutralized by lithium is dissolved in nonaqueous solvents, have shown promise as potential high transference number electrolytes. However, in battery-relevant carbonate solvents (ethylene carbonate/dimethyl carbonate blends), it has been shown that lithium ions do not readily dissociate from easily synthesized sulfonated polymers, despite the solvent’s high dielec. constant (∼50). In this work, a range of additives are screened to improve conductivity, and we demonstrate that the addition of less than 5 vol% of 15-crown-5 achieves an order of magnitude conductivity increase by selectively improving lithium dissociation Utilizing the optimized electrolyte, we show that polyelectrolyte solutions may be directly substituted for a standard electrolyte with com. electrodes in a graphite/LiFePO4 cell, providing further motivation for future study of these new electrolytes. In the part of experimental materials, we found many familiar compounds, such as 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Safety 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. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane

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

《Glycan-Gold Nanoparticles as Multifunctional Probes for Multivalent Lectin-Carbohydrate Binding: Implications for Blocking Virus Infection and Nanoparticle Assembly》 was written by Budhadev, Darshita; Poole, Emma; Nehlmeier, Inga; Liu, Yuanyuan; Hooper, James; Kalverda, Elizabeth; Akshath, Uchangi Satyaprasad; Hondow, Nicole; Turnbull, W. Bruce; Pohlmann, Stefan; Guo, Yuan; Zhou, Dejian. Computed Properties of C9H19NO4 And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:

Multivalent lectin-glycan interactions are widespread in biol. and are often exploited by pathogens to bind and infect host cells. Glycoconjugates can block such interactions and thereby prevent infection. The inhibition potency strongly depends on matching the spatial arrangement between the multivalent binding partners. However, the structural details of some key lectins remain unknown and different lectins may exhibit overlapping glycan specificity. This makes it difficult to design a glycoconjugate that can potently and specifically target a particular multimeric lectin for therapeutic interventions, especially under the challenging in vivo conditions. Conventional techniques such as surface plasmon resonance (SPR) and isothermal titration calorimetry (ITC) can provide quant. binding thermodn. and kinetics. However, they cannot reveal key structural information, e.g., lectin’s binding site orientation, binding mode, and interbinding site spacing, which are critical to design specific multivalent inhibitors. Herein we report that gold nanoparticles (GNPs) displaying a dense layer of simple glycans are powerful mechanistic probes for multivalent lectin-glycan interactions. They can not only quantify the GNP-glycan-lectin binding affinities via a new fluorescence quenching method, but also reveal drastically different affinity enhancing mechanisms between two closely related tetrameric lectins, DC-SIGN (simultaneous binding to one GNP) and DC-SIGNR (intercross-linking with multiple GNPs), via a combined hydrodynamic size and electron microscopy anal. Moreover, a new term, potential of assembly formation (PAF), has been proposed to successfully predict the assembly outcomes based on the binding mode between GNP-glycans and lectins. Finally, the GNP-glycans can potently and completely inhibit DC-SIGN-mediated augmentation of Ebola virus glycoprotein-driven cell entry (with IC50 values down to 95 pM), but only partially block DC-SIGNR-mediated virus infection. Our results suggest that the ability of a glycoconjugate to simultaneously block all binding sites of a target lectin is key to robust inhibition of viral infection. In addition to this study using tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate, there are many other studies that have used tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Computed Properties of C9H19NO4) was used in this study.

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. Computed Properties of C9H19NO4 They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.

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

Zhang, Shunyao; Tamura, Atsushi; Yui, Nobuhiko published their research in Science and Technology of Advanced Materials in 2021. The article was titled 《Weakly acidic carboxy group-grafted β-cyclodextrin-threaded acid-degradable polyrotaxanes for modulating protein interaction and cellular internalization》.Formula: C9H19NO4 The article contains the following contents:

To improve the therapeutic potential of β-cyclodextrin (β-CD)-threaded acid-degradable polyrotaxanes (β-CD PRXs) in cholesterol-related metabolic disorders, we investigated the effect of carboxylation of β-CD PRXs on intracellular uptake. In this study, we established a synthetic method for the modification of carboxylalkyl carbamates on β-CD PRXs without degradation and synthesized three series of carboxyalkyl carbamate group-modified β-CD PRXs with different alkyl spacer lengths. The modification of carboxymethyl carbamate (CMC), carboxyethyl carbamate (CEC), and carboxypropyl carbamate (CPC) on the β-CD PRXs slightly reduced the interaction of the PRXs with the lipid layer model compared with the modification of 2-(2-hydroxyethoxy)ethyl carbamate (HEE-PRX), which was used in our previous studies. However, all the carboxylated β-CD PRXs showed a significantly stronger interaction with a protein model compared with HEE-PRX. The carboxylated β-CD PRXs showed significantly high intracellular uptake, through macrophage scavenger receptor A (MSR-A)-mediated endocytosis, in MSR-A-pos. RAW 264.7 cells compared with HEE-PRX. Interestingly, the carboxylated β-CD PRXs also showed significantly higher intracellular uptake even in MSR-A-neg. cells compared with HEE-PRX. Carboxylated β-CD PRXs are considered to strongly interact with other membrane proteins, resulting in high intracellular uptake. The length of the alkyl spacer affected the intracellular uptake levels of carboxylated PRXs, however, this relationship was varied for different cell types. Furthermore, none of the carboxylated β-CD PRXs exhibited cytotoxicity in the RAW 264.7 and NIH/3T3 cells. Altogether, carboxylation of β-CD PRXs is a promising chem. modification approach for their therapeutic application because carboxylated β-CD PRXs exhibit high cellular internalization efficiency in MSR-A-neg. cells and negligible toxicity. In the part of experimental materials, we found many familiar compounds, such as tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Formula: 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. Formula: C9H19NO4

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

Swathi, G.; Deepthi, G.; Visakh, Deepthi; Prathyusha, J.; Fatima, Nafees; lakshmi, M. Sai published their research in Indo American Journal of Pharmaceutical Sciences in 2021. The article was titled 《Development and validation for estimation of clindamycin, adapalene and sofosbuvir in bulk and pharmaceutical dosage forms by rp-hplc method》.HPLC of Formula: 106685-40-9 The article contains the following contents:

A simple, accurate, rapid and precise isocratic stability indicating reversed-phase high-performance liquid chromatog. method has been developed and validated for simultaneous determination of Clindamycin and Adapalene in tablets. The chromatog. separation was carried out on C18 BDS Hypersil (150 × 4.6mm, 5μ) with a mixture ofmixed phosphate buffer : acetonitrile (55:45%volume/volume) as a mobile phase at a flow rate of 1.0mL/min. UV detection was performed at 230nm. The retention times were2.84 and 3.999min for Clindamycin and Adapalene resp. Calibration plots were linear (r2 = 0.999) over the concentration range of 25-150μg/mL for Clindamycin and 2.5-15μg/mL for Adapalene. The method was validated for accuracy, precision, specificity, linearity and sensitivity. The proposed method was successfully used for quant. anal. of tablets. No interference from any component of pharmaceutical dosage form was observed Validation studies revealed that method is specific, rapid, reliable, and reproducible. The high recovery and low relative standard deviation confirm the suitability of the method for routine determination of Clindamycin and Adapalene in bulk and tablet dosage form. Sofosbuvir is used primarily to treat hepatitis C and viral hemorrhagic fevers. It is possible to select a sofosbuvir resistant mutant of HCV that can replicate to levels similar to wild type virus grown without sofosbuvir. Anal. of the mutations responsible for the sofosbuvir resistance may aid in understanding the mechanism of action of sofosbuvir. The results came from multiple reactions, including the reaction of 6-(3-(Adamantan-1-yl)-4-methoxyphenyl)-2-naphthoic acid(cas: 106685-40-9HPLC of Formula: 106685-40-9)

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.HPLC of Formula: 106685-40-9

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Ether – Wikipedia,
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Zhang, Kan; Yao, Yanxiu; Sun, Wenjin; Wen, Rui; Wang, Yanyan; Sun, Huaming; Zhang, Weiqiang; Zhang, Guofang; Gao, Ziwei published an article in 2021. The article was titled 《Triazine-wingtips accelerated NHC-Pd catalysed carbonylative Sonogashira cross-coupling reaction》, and you may find the article in Chemical Communications (Cambridge, United Kingdom).Formula: C7H7IO The information in the text is summarized as follows:

By using a ppm-level precatalyst T-NHC-Pd, the highly efficient coupling of aryl iodide, alkyne and carbon monoxide furnished a variety of ynone compounds T-NHC-Pd, which deprotonated 4-methyl-phenylacetylene under mild conditions, converted into alkynyl-coordinated catalytic active species PdCl(T-NHC)(Py)(alkynyl). In the putative Pd/Pd catalytic cycle, both triazine-wingtips and NHCs were key players for establishing the carbonylative cross-couplings with high TON and TOF. 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) participates in palladium catalyzed enantioselective Heck arylation of 2,3-dihydrofuran in the presence of chiral ionic liquids containing L-prolinate and L-lactate anions and non-chiral quaternary ammonium cations.Formula: C7H7IO

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

Computed Properties of C7H9BO3In 2019 ,《Installation of Minimal Tetrazines through Silver-Mediated Liebeskind-Srogl Coupling with Arylboronic Acids》 was published in Journal of the American Chemical Society. The article was written by Lambert, William D.; Fang, Yinzhi; Mahapatra, Subham; Huang, Zhen; am Ende, Christopher W.; Fox, Joseph M.. The article contains the following contents:

Described is a general method for the installation of a minimal 6-methyltetrazin-3-yl group via the 1st example of a Ag-mediated Liebeskind-Srogl cross-coupling. The attachment of bioorthogonal tetrazines on complex mols. typically relies on linkers that can neg. impact the physiochem. properties of conjugates. Cross-coupling with arylboronic acids and a new reagent, 3-((p-biphenyl-4-ylmethyl)thio)-6-methyltetrazine (b-Tz), proceeds under mild, PdCl2(dppf)-catalyzed conditions to introduce minimal, linker-free tetrazine functionality. Safety considerations guided the authors’ design of b-Tz which can be prepared on decagram scale without handling hydrazine and without forming volatile, high-N tetrazine byproducts. Replacing conventional Cu(I) salts used in Liebeskind-Srogl cross-coupling with a Ag2O mediator resulted in higher yields across a broad library of aryl and heteroaryl boronic acids and provides improved access to a fluorogenic tetrazine-BODIPY conjugate. A covalent probe for MAGL incorporating 6-methyltetrazinyl functionality was synthesized in high yield and labeled endogenous MAGL in live cells. This new Ag-mediated cross-coupling method using b-Tz is anticipated to find addnl. applications for directly introducing the tetrazine subunit to complex substrates. The results came from multiple reactions, including the reaction of 3-Methoxyphenylboronic acid(cas: 10365-98-7Computed Properties of C7H9BO3)

3-Methoxyphenylboronic acid(cas: 10365-98-7) belongs to boronic acids. Boronic acids are mild Lewis acids which are generally stable and easy to handle, making them important to organic synthesis.Computed Properties of C7H9BO3

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Ether – Wikipedia,
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Recommanded Product: 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochlorideOn September 10, 2019 ,《Determination of epoxide impurity in sarpogrelate hydrochloride intermediate by UHPLC and column-switching liquid chromatography》 was published in Journal of Pharmaceutical and Biomedical Analysis. The article was written by Wang, Ran; Zhu, Zhiling; Qiu, Xiaodan; Bai, Liping; Guo, Weiwei; Zuo, Limin; Zhao, Ting; Shan, Guangzhi. The article contains the following contents:

The determination of genotoxic impurities, which is closely related to toxicol. concern and daily dose, plays a key role in drug quality control. Epoxide impurity is a kind of genotoxic impurity with an epoxy ring structure during the synthesis process of sarpogrelate hydrochloride. According to the sarpogrelate hydrochloride daily dose, epoxide impurity is limited to the under 5 ppm level. The liquid chromatog.-tandem mass spectrometric (LC/MS/MS) or the gas chromatog.-mass spectrometric (GC/MS) method is commonly used to characterize the epoxide impurity of sarpogrelate hydrochloride intermediates. However, these methods are not simple or economical enough to detect epoxide impurity. In this study, we resolved the problem by using the most common UV method with two ideas: one was to improve the absolute sensitivity, and the other was to reduce matrix effects. Both ultra high-performance liquid chromatog. (UHPLC with high sensitivity LightPipe flow cells) and column-switching liquid chromatog. methods were developed and validated for the quant. determination of epoxide impurity in sarpogrelate hydrochloride intermediates. The limits of detection (LODs) of the UHPLC and column-switching liquid chromatog. methods were 0.09 ppm (0.09μg/g) and 0.33 ppm (0.33μg/g), and the recovery rates of both methods were 87.2%-132.1% and 97.4%-100.1%, resp. Both methods established and provided guidance for analysts to develop procedures for impurity control, especially for structures of impurity with similar matrixes. In the experimental materials used by the author, we found 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride(cas: 135261-74-4Recommanded Product: 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride)

1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride(cas: 135261-74-4) belongs to anime. To avoid the problem of multiple alkylation, methods have been devised for “blocking” substitution so that only one alkyl group is introduced. The Gabriel synthesis is one such method; it utilizes phthalimide, C6H4(CO)2NH, whose one acidic hydrogen atom has been removed upon the addition of a base such as KOH to form a salt.Recommanded Product: 1-(Dimethylamino)-3-(2-(3-methoxyphenethyl)phenoxy)propan-2-ol hydrochloride

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Ether – Wikipedia,
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The author of 《Facile Process for Metallizing DNA in a Multitasking Deep Eutectic Solvent for Ecofriendly C-C Coupling Reaction and Nitrobenzene Reduction》 were Chakraborty, Supratim; Mruthunjayappa, Manohara Halanur; Aruchamy, Kanakaraj; Singh, Nripat; Prasad, Kamalesh; Kalpana, Dharmalingam; Ghosh, Debasis; Sanna Kotrappanavar, Nataraj; Mondal, Dibyendu. And the article was published in ACS Sustainable Chemistry & Engineering in 2019. Formula: C7H9BO3 The author mentioned the following in the article:

Metalized DNA is an exciting functional material having widespread utility toward multifunctional applications. However, conventional DNA metalization processes are time-consuming and multistep and, most importantly, the helicity of DNA is destroyed during the metalization process. Herein, an ecofriendly and rapid approach was demonstrated to metalize salmon milt DNA with Pd and Fe3O4 in deep eutectic solvent (DES; ChoCl-EG 1:2 mol ratio) without disturbing the structural integrity of the biopolymer. Besides maintaining the stability of DNA at high temperature, DES played the dual role of (i) a solvent for DNA metalization and (ii) a reducing agent for reduction of Pd(II) to Pd(0) during the metalization process. Microscopic studies confirmed the stepwise formation of aggregated coil type morphol. in metalized DNA (Pd-DNA-Fe3O4). Whereas, the interactions between Pd and Fe3O4 with DNA in Pd-DNA-Fe3O4 were probed by different anal. tools, which suggested that Pd interacted with phosphate groups and Fe3O4 interacted with the base pairs of DNA. CD spectroscopy anal. established that the B-form of DNA was maintained before and after the metalization process. After successful metalization, Pd-DNA-Fe3O4 was utilized as a nanobiocatalyst for Suzuki coupling reaction and reduction of nitrobenzene to aniline. The metalized DNA showed remarkable catalytic activity and efficiency for sustainable Suzuki coupling reaction in DES. Under optimized conditions, 100% conversion of the substrates was recorded with 100% selectivity of the desired C-C coupled product. Taking advantage of the high temperature stability of DNA in DES, the recyclability (up to 6 cycles) potential of both metalized DNA and DES toward C-C coupling was explored without significant loss in the catalytic activity, thus demonstrating the green aspects of the process. When utilized as a catalyst for the reduction of nitrobenzene to aniline, ∼90% conversion of nitrobenzene was achieved with 66% selectivity of aniline which suggested that the overall assembly of metalized DNA is a efficient system to carry out facile nitrobenzene reduction Overall, the present study demonstrates a general process for metalization of DNA in DES and the applications of the metalized DNA as a catalyst in different organic reactions. In the experiment, the researchers used 3-Methoxyphenylboronic acid(cas: 10365-98-7Formula: C7H9BO3)

3-Methoxyphenylboronic acid(cas: 10365-98-7) belongs to boronic acids. Boronic acids are mild Lewis acids which are generally stable and easy to handle, making them important to organic synthesis.Formula: C7H9BO3

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

The author of 《Chain-growth horner-wadsworth-emmons condensation polymerization initiated with an aliphatic aldehyde》 were Sato, Keichiro; Goto, Eisuke; Ochiai, Yuto; Higashihara, Tomoya. And the article was published in Journal of Photopolymer Science and Technology in 2019. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane The author mentioned the following in the article:

The effective initiation for the chain-growth Horner-Wadsworth-Emmons (HWE) condensation polymerization was succeeded by utilizing an aliphatic aldehyde. Due to the higher electrophilicity of the aliphatic aldehyde compared with the aromatic one, the reactivity of the initiation might be accelerated, producing uniform intermediates to result in the formation of well-defined poly(3-(2-ethylhexyl)thienylene vinylene) (P3EHTV). Consequently, P3EHTV possessed the predictable mol. weight and lower molar-mass dispersity (ETHM = 1.16) value than that of P3EHTV obtained by employing aromatic aldehyde compounds as the initiators. In this polymerization system, neither transition metals nor halogens are utilized to realize low environmental-load synthesis of well-defined π-conjugated polymers. The results came from multiple reactions, including the reaction of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Safety 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. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane

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