Category: ethers-buliding-blocks

Fanourakis, Alexander; Williams, Benjamin D.; Paterson, Kieran J.; Phipps, Robert J. published the artcile< Enantioselective Intermolecular C-H Amination Directed by a Chiral Cation>, Product Details of C11H16O2, the main research area is heptafluorobutyl hydroxy butyl sulfamate preparation enantioselective; arylbutanol heptafluorobutyl sulfamate intermol amination rhodium catalyst.

A family of anionic variants of the best-in-class catalyst for Rh-catalyzed C-H amination, Rh2(esp)2, with which the chiral cations are associated And derived from quaternized cinchona alkaloids, has been described. These ion-paired catalysts enable high levels of enantioselectivity to be achieved in the benzylic C-H amination of substrates R(CH2)4OH (R = Ph, 1-naphthyl, 3-methylthiophen-2-yl, etc.) bearing pentyl hydroxyl groups. Addnl., the quinoline of the chiral cation appears to engage in axial ligation to the rhodium complex, providing improved yields of products RCH(NHS(O)2OCH2R1)(CH2)3OH (R1 = (CF2)2CF3) vs. Rh2(esp)2 and highlighting the dual role that the cation is playing. These results underline the potential of using chiral cations to control enantioselectivity in challenging transition-metal-catalyzed transformations.

Journal of the American Chemical Society published new progress about Amination catalysts (intermol., stereoselective). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Product Details of C11H16O2.

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

Landge, Shashikant B.; Dahale, Sunil B.; Jadhav, Sanjay A.; Solanki, Pavankumar V.; Bembalkar, Saroj R.; Mathad, Vijayavitthal T. published the artcile< Development and validation of stability indicating rapid RP-LC method for determination of process and degradation related impurities of apremilast, an anti-inflammatory drug>, COA of Formula: C12H19NO4S, the main research area is RPLC degradation apremilast antiinflammatory drug.

A new, specific, rapid and stability indicating reversed phase liquid chromatog. (RP-LC) method for the determination of process related and degradation related impurities of Apremilast has been developed and validated. The degradation study performed in acid, base, oxidative, photolytic, and thermal stressed conditions. Eight process related impurities (Imp-1 to Imp-8) in test sample of Apremilast have been detected by developed RP-LC method. The good chromatog. resolution between the peaks of process related impurities, degradation impurities and Apremilast has been achieved on a Synergi Max-RP 80 A (150 × 4.6 mm ID), 4μ column. The process and degradation related impurities were characterized by mass spectrometry, 1 H NMR and FT-IR spectral data. The method was validated as per ICH guideline and found to be specific, rapid, and stability indicating. The proposed RP-PLC method was successfully applied to the anal. of drug substance samples of Apremilast.

American Journal of Analytical Chemistry published new progress about Anti-inflammatory agents. 608141-42-0 belongs to class ethers-buliding-blocks, and the molecular formula is C12H19NO4S, COA of Formula: C12H19NO4S.

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

Dupuy, Stephanie; Zhang, Ke-Feng; Goutierre, Anne-Sophie; Baudoin, Olivier published the artcile< Terminal-Selective Functionalization of Alkyl Chains by Regioconvergent Cross-Coupling>, Formula: C11H16O2, the main research area is aryl triflate alkyl bromide palladium zinc Barbier Negishi coupling; alkyl linear arene preparation; C−C coupling; alkyl bromides; homogeneous catalysis; palladium; remote functionalization.

Hydrocarbons are still the most important precursors of functionalized organic mols., which has stirred interest in the discovery of new C-H bond functionalization methods. We describe herein a new step-economical approach that enables C-C bonds to be constructed at the terminal position of linear alkanes. First, we show that secondary alkyl bromides can undergo in situ conversion into alkyl zinc bromides and regioconvergent Negishi coupling with aryl or alkenyl triflates. The use of a suitable phosphine ligand favoring Pd migration enabled the selective formation of the linear cross-coupling product. Subsequently, mixtures of secondary alkyl bromides were prepared from linear alkanes by standard bromination, and regioconvergent cross-coupling then provided access to the corresponding linear arylation product in only two steps.

Angewandte Chemie, International Edition published new progress about Alkylarenes Role: SPN (Synthetic Preparation), PREP (Preparation). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Formula: C11H16O2.

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

Antuganov, Dmitrii; Zykov, Michail; Timofeev, Vasilii; Timofeeva, Ksenija; Antuganova, Yulija; Orlovskaya, Victoriya; Fedorova, Olga; Krasikova, Raisa published the artcile< Copper-Mediated Radiofluorination of Aryl Pinacolboronate Esters: A Straightforward Protocol by Using Pyridinium Sulfonates>, Electric Literature of 190788-60-4, the main research area is aryl pinacolboronate ester radiofluorination copper pyridinium sulfonate catalyst base.

Radiofluorination of arylboronic acids pinacol esters (arylBPin) mediated by copper triflate pyridine complex is one of the more promising synthetic approaches for the direct introduction of nucleophilic [18F]fluoride into non-activated arenes and heteroarenes. However, the application of this method to the production of positron emission tomog. (PET) radiotracers in automated synthesizers remains a challenging task. The choice of phase-transfer catalyst (PTC) and corresponding base used for the generation of reactive [18F]fluoride species has a profound impact on the efficiency of the 18F-fluorination process. Herein the authors report the development of a simple procedure involving trapping of the aqueous [18F]fluoride on a weak anion-exchange resin (WAX) and its release by elution with pyridinium sulfonate in di-Me acetamide. Obtained reactive [18F]fluoride was used as-is in a copper-catalyzed fluorination reaction employing pyridinium salt as both PTC and base. High radiochem. conversion rates (RCCs) achieved for a series of simple arylBPin substrates and 4-[18F]fluoro-D,L-phenylalanine demonstrate the efficiency of this novel 18F-processing approach. Notably, the proposed method obviates conventional azeotropic drying steps, solvents evaporation and/or changeover and can be implemented on com. automated synthesizers.

European Journal of Organic Chemistry published new progress about Esters Role: RCT (Reactant), RACT (Reactant or Reagent) (Aryl Pinacolboronate Esters). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, Electric Literature of 190788-60-4.

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

Xi, Xudong; Yin, Hongfang; Jin, Xiaojun; He, You published the artcile< Extraction of Notopterygium forbesii by supercritical CO2 extraction>, Quality Control of 52244-70-9, the main research area is Notopterygium supercritical carbon dioxide extraction.

The extracting process for Notopterygium forbesii by supercritical CO2 extraction was optimized. The best conditions of the extracting essential oil from root of Notopterygium forbesii by SFE-CO2 were studied and chem. composition was determined by using the GC-MS. The optimum process was as following: the temperature of extracting technique was 50°, pressure 25 MPa, extraction time 2 h and gas flow rate 65 kg/h-1. The extracting rate of essential oil was 8.8%, about 6 times to steam distillation And 159 kinds of compound was identified from extracting essential oil, furthermore compound containing Cl, S, B, F, the Si element had not been reported in the related literature. Temperature and pressure were the key factors which affected extracting efficiency and stability of Notopterygium forbesii by supercritical CO2 extraction

Yaowu Fenxi Zazhi published new progress about Essential oils Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Quality Control of 52244-70-9.

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

Iijima, Daisuke; Sugama, Hiroshi; Awai, Nobumasa; Takahashi, Yoichi; Togashi, Yuko; Takebe, Tohru; Xie, Jianshu; Shen, Jingkang; Ke, Ying; Akatsuka, Hidenori; Kawaguchi, Takayuki; Takedomi, Kei; Kashima, Akiko; Nishio, Masashi; Inui, Yosuke; Yoneda, Hikaru; Xia, Guangxin; Iijima, Toru published the artcile< Discovery of Novel 2-Carbamoyl Morpholine Derivatives as Highly Potent and Orally Active Direct Renin Inhibitors>, Electric Literature of 6482-24-2, the main research area is carbamoyl morpholine derivative preparation oral renin inhibitor hypertension.

The renin-angiotensin-aldosterone system (RAAS) plays a key role in the regulation of blood pressure. Renin, the first and rate-limiting enzyme of the RAAS, is an attractive target for the treatment of hypertension and cardiovascular/renal diseases. Therefore, various direct renin inhibitors (DRIs) have been researched over recent decades; however, most exhibited poor pharmacokinetics and oral bioavailability due to the peptidomimetic or nonpeptidomimetic structures with a mol. weight (MW) of >600, and only aliskiren is approved. This study introduces a novel class of DRIs comprised of a 2-carbamoyl morpholine scaffold. These compounds have a nonpeptidomimetic structure and a MW of <500. The representative compound 26 was highly potent despite not occupying S1′-S2′ sites or the opened flap region used by other DRIs and exerted a significant antihypertensive efficacy via oral administration on double transgenic mice carrying both the human angiotensinogen and the human renin genes. ACS Medicinal Chemistry Letters published new progress about Antihypertensives. 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, Electric Literature of 6482-24-2.

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

Chen, Yan; Bian, Yuemin; Wang, Jian-Wei; Gong, Ting-Ting; Ying, You-Min; Ma, Lie-Feng; Shan, Wei-Guang; Xie, Xiang-Qun; Zhan, Zha-Jun published the artcile< Effects of α-Mangostin Derivatives on the Alzheimer's Disease Model of Rats and Their Mechanism: A Combination of Experimental Study and Computational Systems Pharmacology Analysis>, Application of C8H11NO, the main research area is mangostin derivative preparation Alzheimer’s neuroprotectant memory learning cognition.

α-Mangostin (α-M) is a natural xanthone from the pericarp of fruit Garcinia mangostana and possesses versatile biol. activities. α-M has a therapeutic potential to treat Alzheimer’s disease (AD) because of its anti-inflammatory, antioxidative, and neuroprotective activities. However, the use of α-M for AD treatment is limited due to its cytotoxic activities and relatively low potency. Modifications of its chem. structure were needed to reduce its cytotoxicity and improve its therapeutic potential against AD. For this purpose, 16 α-M carbamate derivatives were synthesized. An animal model of AD was established, and the effects of AMG-1 on the spatial learning ability and memory ability were evaluated using behavioral tests. The effect on neuropathol. was tested by histopathol. evaluation, Nissl staining, and silver staining. Computational systems pharmacol. anal. using the chemogenomics knowledgebase was applied for network studies. Compound-target, target-pathway, and target-disease networks were constructed, integrating both in silico anal. and reported exptl. data. The results show that AMG-1 can demonstrate its therapeutic effects in a one-mol., multiple-targets manner to remarkably ameliorate neurol. changes and reverse behavioral deficits in AD model rats. The improved cognitive function and alleviated neuronal injury can be observed The ability of AMG-1 to scavenge β-amyloid in the hippocampus was validated in AD model rats.

ACS Omega published new progress about Alzheimer disease. 10541-78-3 belongs to class ethers-buliding-blocks, and the molecular formula is C8H11NO, Application of C8H11NO.

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

Ihndris, Ray W.; Gouck, Harry K.; Bowen, C. V. published the artcile< Effect of promising insect repellents on plastics and paints>, Application In Synthesis of 52244-70-9, the main research area is .

Action of 380 repellents on Lucite, cellulose acetate, and Vinylite after 48 h. of contact are tabulated (studies in 1946). Sixty-eight of the compounds did not change any of the plastics. Lucite was attacked by 261, cellulose acetate by 126, and Vinylite by 251. Only 99 compounds attacked all 3. Results of studies in 1953 are shown in a tabulation of effects on paint, Plexiglas, Vinylite, rayon, and Plastocel of 136 repellents which had not proved unsatisfactory since 1946 for some other reason. All but 2 compounds affected paint; one of them, octyl crotonate, affected only varnish and vinylite, and the other, 3,6,8-trimethyl-4-nonyne-3-6-diol affected only varnish. Vinylite was damaged by 107, Plexiglas by 58, rayon by 55, and Plasticel by 46. In other tests only 2 chems., 2-benzyloxynaphthalene and 2-iso-pentyloxynaphthalene, affected polyethylene, and they only slightly. Fourteen materials slightly stained nylon. In still other tests, Lucite and Plexiglas were found to differ slightly in their resistance to various agents.

United States, Agricultural Research Service, [Report] ARS published new progress about Aromatic hydrocarbons Role: BIOL (Biological Study). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Application In Synthesis of 52244-70-9.

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

Apelt, J.; Grassmann, S.; Ligneau, X.; Pertz, H. H.; Ganellin, C. R.; Arrang, J.-M.; Schwartz, J.-C.; Schunack, W.; Stark, H. published the artcile< Search for histamine H3 receptor antagonists with combined inhibitory potency at Nτ-methyltransferase: ether derivatives>, Product Details of C11H16O2, the main research area is histamine receptor antagonist methyltransferase inhibitor aryl piperidinopropyl ether preparation.

Several compounds containing an ether moiety derived from 4-(3-piperidinopropoxy)phenylaminoquinoline derivatives, such as FUB 836, were synthesized and tested for their affinity at cloned human histamine H3 (hH3) receptors and on the inhibition of rat histamine Nτ-methyltransferase (HMT). Besides different heterocycles, e.g. nitro- or amino-substituted pyridines, quinolines, benzothiazole or pyrroline, three classes of compounds were produced: heteroaromatic 3-piperidinopropyl ethers, keto- or imino-substituted 4-(3-piperidinopropyl)phenyl ethers and 4-(3-piperidinopropyl)phenyl ethers with substituted (alkyl)aminopyridines. Whereas the (3-piperidinopropoxy)heterocycles showed only moderate activities on both test models, the 4-(3-piperidinopropoxy)phenyl derivatives were identified as potent histamine H3 receptor ligands and/or HMT inhibitors. Ki values ≤ 0.42 nM were found for the affinity to the hH3 receptor. HMT inhibitory potency was identified with IC50 values about 0.3 μM for the most potent compounds in this series. Comparison of the pyridine-containing derivatives to recently published quinoline analogs showed a decrease in potencies for the pyridines. The dual activity, H3 receptor affinity and HMT inhibition, was moderate to good. For all compounds affinities at hH3 receptors were higher than their inhibitory HMT potencies.

Pharmazie published new progress about Histamine H3 receptor antagonists. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Product Details of C11H16O2.

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

Taylor, Edward C.; Andrade, Juan G.; Rall, Gerhardus J. H.; Turchi, Ignatius J.; Steliou, Kosta; Jagdmann, G. Erik Jr.; McKillop, Alexander published the artcile< Thallium in organic synthesis. 61. Intramolecular capture of radical cations from thallium(III) trifluoroacetate oxidation of arylalkanoic acids and arylalkanols. New routes to oxygen heterocycles>, Recommanded Product: 4-(4-Methoxyphenyl)-1-butanol, the main research area is thallium trifluoroacetate oxidation arylalkenoic acid; arylalkanol thallium trifluoroacetate oxidation; cyclization oxidative arylalkanoic acid arylalkanol; coumarin dihydro; spirocyclohexadienone lactone.

Treatment of electron-rich arylpropionic acids with (F3CCO2)3Tl (I) in F3CCO2H containing a small amount of BF3 etherate gave dihydrocoumarins and spirocyclohexadienone lactones by initial formation of aromatic radical cations followed by intramol. cyclization involving the side-chain carboxyl group. The scope and limitations of this reaction with respect to aromatic substitution and the length of the alkanoic acid side chain have been examined; the reaction has been extended with analogous results to 1-naphthalenylalkanoic acids. Oxidation of a series of homologous phenyl- and naphthalenyl-1-alkanols with I under similar conditions resulted in intramol. cyclization to give fused or pendant cyclic ethers. The observed propensity for intramol. cyclization may be due to complexation of both the aryl group and the side-chain basic substituent (-CO2H or -OH) with thallium(III).

Journal of the American Chemical Society published new progress about Cyclization. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Recommanded Product: 4-(4-Methoxyphenyl)-1-butanol.

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