Category: ethers-buliding-blocks

Kerdouci, Jamila published the artcileStructure-activity relationship for the gas-phase reactions of NO₃ radical with organic compounds: Update and extension to aldehydes, Computed Properties of 1589-47-5, the publication is Atmospheric Environment (2014), 363-372, database is CAplus.

In this work is presented an extension and an update of a recently published structure-activity relationship (SAR) for the prediction of rate constants for gas-phase reactions of VOCs with NO₃ radicals (See previous version in Kerdouci et al., 2011). Such predictive tools are very useful to describe the reactivity of organic compounds in atm. models. This SAR is constructed on the group-additivity method and is based on a wide kinetic database for 185 organic compounds In addition to alkanes, alkenes and saturated and unsaturated oxygenated species already included in the first version of this SAR, this extended version comprises now aldehydes and unsaturated aldehydes. Indeed, since then, new kinetic studies have been performed for alkenals which allow the parameterization of this class of compounds In addition, since new rate constants have been measured for unsaturated ethers, the parameterization of this family of compounds has been completed. Finally, this new version of the SAR shows very good predictive capabilities with more than 90% of the exptl. rate coefficients being reproduced within a factor of two.

Atmospheric Environment published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Computed Properties of 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kerdouci, Jamila published the artcilePrediction of rate constants for gas-phase reactions of nitrate radical with organic compounds: A new structure-activity relationship, Name: 2-Methoxypropan-1-ol, the publication is ChemPhysChem (2010), 11(18), 3909-3920, database is CAplus and MEDLINE.

A new structure-activity relationship (SAR), based on parametrization of the mol. structure according to the group-additivity method, is presented. On the basis of existing exptl. data for the degradability of approx. 150 organic compounds by the NO₃ radical, this new SAR is developed to estimate the rate constants for reactions with NO₃ radical. At night, nitrate radicals are the most important oxidant of volatile organic compounds The rate constants for their reactions are therefore essential to the understanding of VOC degradation and atm. modeling. The database used for the SAR development includes most classes of compounds such as alkanes, alkenes (acyclic and cyclic), dienes, terpenes and saturated and unsaturated oxygenated compounds (including alcs., ketones, ethers and esters). The proposed SAR shows good efficiency, as 91% of the rate constants are reproduced within a factor of two. The overall agreement between measured and predicted rate constants is very good for most of the unsaturated and saturated compounds, although for saturated alcs. it is less reliable.

ChemPhysChem published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Name: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Luong, Tuan Minh published the artcileTotal Asymmetric Synthesis and Stereochemical Confirmation of (+)- and (-)-Lyoniresinol and Its Deuterated Analogues, Quality Control of 134-96-3, the publication is Journal of Organic Chemistry (2022), 87(6), 4254-4262, database is CAplus and MEDLINE.

Lyoniresinol and its derivatives are lignans which have been isolated from a plethora of plant species. In addition to exhibiting a range of interesting biol. activities including anticancer, anti-inflammatory, antimicrobial, and others, these compounds have also been discovered in wines and spirits and shown to have gustatory effects in these alc. matrixes. (+)-Lyoniresinol 1 is reported to impart a strong bitter taste while its enantiomer (-)-lyoniresinol 2 is tasteless. The first total asym. synthesis of both natural enantiomers (+)-1 and (-)-2 and their deuterated analogs (D₄)-(+)-3 and (D₄)-(-)-4 has been achieved, confirming the structure and stereochem. of the natural products. The synthesized compounds can be utilized as internal standards in stable isotope dilution anal. for improving and optimizing the existing lyoniresinol quantitation methods in the future.

Journal of Organic Chemistry published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Quality Control of 134-96-3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Patriciu, Oana-Irina published the artcileSynthesis of nitro N,N’-dipyridinylamines via oxidative nucleophilic substitution of hydrogen, Quality Control of 52818-63-0, the publication is Synthesis (2007), 3868-3876, database is CAplus.

The amination of 3-nitropyridines with aromatic amides generated from various aminopyridine derivatives proceeded unexpectedly in the position para to the nitro group, giving the oxidative nucleophilic substitution of hydrogen (ONSH) derived compounds After optimization, this reaction allowed easy access to interesting 3-nitro-substituted N,N’-dipyridinylamines.

Synthesis published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Quality Control of 52818-63-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Roush, W. R. published the artcile[(E)-γ-(Dimethylphenylsilyl)allyl]diisopinocampheylborane: a highly enantioselective reagent for the synthesis of anti-β-hydroxyallylsilanes, COA of Formula: C21H37BO, the publication is Tetrahedron Letters (2000), 41(49), 9413-9417, database is CAplus.

Anti-β-Hydroxyallylsilanes, MeCH(OH)CH(CH:CH₂)SiMe₂Ph for example, were prepared with 88-95% e.e. via asym. allylboration reactions of aldehydes, MeCHO for example, with [(E)-γ-(dimethylphenylsilyl)allyl]diisopinocampheylborane.

Tetrahedron Letters published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C21H37BO, COA of Formula: C21H37BO.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Trost, Barry M. published the artcileA short and concise asymmetric synthesis of hamigeran B, Synthetic Route of 725251-81-0, the publication is Chemistry – A European Journal (2005), 11(3), 951-959, database is CAplus and MEDLINE.

The interesting biol. properties of the hamigerans wherein hamigeran B (I) is a potent antiviral agent with low cytotoxicity to host cells make these deceptively simple looking structures challenging synthetic targets. A strategy to hamigeran B evolved wherein the three contiguous stereocenters are established ultimately from a Pd catalyzed asym. allylic alkylation (AAA). The latter involves an asym. allylation of a non-stabilized ketone enolate in 77% yield and 93% ee. By using this process, (S)-5-allyl-2-isopropyl-5-methyl-1-trifluoromethanesulfonyloxycyclopentene becomes available in four steps from 2-methylcyclopentanone. Introduction of the aryl unit by cross-coupling proceeded intermolecularly but failed intramolecularly. On the other hand, reductive removal of the triflate permitted a Heck reaction to effect intramol. introduction of the aryl ring. The unusual conformational properties of this mol. architecture are revealed by the regioselectivity of the β-hydrogen elimination in the Heck reaction and the diastereoselectivity of the reduction establishing the stereochem. of the carbon bearing the iso-Pr group. The successful route consists of 15 steps from 2-methylcyclopentanone and dimethylorcinol illustrating the efficiency of the route based upon the Pd AAA.

Chemistry – A European Journal published new progress about 725251-81-0. 725251-81-0 belongs to ethers-buliding-blocks, auxiliary class Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is (3-Methoxy-5-methylphenyl)boronic acid, and the molecular formula is C9H12O, Synthetic Route of 725251-81-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Weickmann, Daniel published the artcileThe Ru-Catalyzed Alkylative Dearyloxylation of L-type 2-Aryloxyethanols, Safety of 1-(3,4-Dimethoxyphenyl)-2-phenoxyethanol, the publication is ChemCatChem (2013), 5(8), 2170-2173, database is CAplus.

The authors report the ruthenium-catalyzed cleavage of the β-C-O linkage in different lignin model compounds; this also allow for direct sequential alkylation of the resulting acetophenone derivatives using alcs. as alkylation agents. Thus, reacting PhCH(OH)CH₂OPh with (Ph₃P)₃RuCl₂ gave PhCOMe and PhOH in excellent yields. Adding PhCH₂OH led to PhCOCH₂CH₂Ph in 71% yield.

ChemCatChem published new progress about 183303-74-4. 183303-74-4 belongs to ethers-buliding-blocks, auxiliary class Benzene,Alcohol,Ether, name is 1-(3,4-Dimethoxyphenyl)-2-phenoxyethanol, and the molecular formula is C8H15NO, Safety of 1-(3,4-Dimethoxyphenyl)-2-phenoxyethanol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Prieto, Alejandro published the artcileOne-pot two-step process for direct propylene oxide production catalyzed by bi-functional Pd(Au)@TS-1 materials, Application of 2-Methoxypropan-1-ol, the publication is Applied Catalysis, A: General (2016), 73-84, database is CAplus.

Different bi-functional materials (Pd(Au)@TS-1) based on metallic nanoparticles supported onto active nanocrystalline titanium silicalite (TS-1) zeolites were synthesized, characterized and used as recyclable heterogeneous catalysts for direct propylene oxide production from hydrogen, oxygen and propylene through one-pot two-step consecutive process. These catalysts allowed carrying out the combined reaction where metallic nanoparticles catalyzed the formation of in situ H₂O₂ that was the necessary intermediate for propylene epoxidation catalyzed by active TS-1 nanocrystalline support. Several variables were considered such as use of supercritical CO₂ conditions, modifiable content of metallic species, and presence of addnl. co-solvents, surface acidity inhibitors and H₂O₂ stabilizers. Reusability and stability of the bi-functional catalyst was showed through consecutive catalytic cycles.

Applied Catalysis, A: General published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Application of 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wang, Zi-Long published the artcileStructure-Based Optimization of Multifunctional Agonists for Opioid and Neuropeptide FF Receptors with Potent Nontolerance Forming Analgesic Activities, Name: (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, the publication is Journal of Medicinal Chemistry (2016), 59(22), 10198-10208, database is CAplus and MEDLINE.

The opioid and neuropeptide FF pharmacophore-containing chimeric peptide 0 (BN-9) was recently developed and produced potent nontolerance forming analgesia. In this study, 11 analogs of 0 were designed and synthesized. An in vitro cAMP assay demonstrated that these analogs behaved as multifunctional agonists at both opioid and NPFF receptors. In mouse tail-flick test, most of the analogs produced potent nontolerance forming antinociception. Notably, 11 (DN-9) was 33-fold more potent than 0 at analgesic effects, which was mediated by μ- and κ-opioid receptors. In addition, 11 also produced powerful analgesic effects in the formalin pain and CFA-induced chronic inflammatory pain models. Strikingly, following its repeated administration for 6 days, 11 did not produce antinociceptive tolerance in the tail-flick test and CFA-induced pain model. The present work indicates that it is reasonable to design multifunctional peptide ligands for opioid and NPFF receptors in a single mol. producing effective nontolerance forming antinociception.

Journal of Medicinal Chemistry published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C6H3ClFNO2, Name: (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Shi, Tiancai published the artcileMatrix effect compensation for analyte protectants during aroma component analysis of tobacco, Application of 2-Methoxynaphthalene, the publication is Yancao Keji (2021), 54(9), 27-39, database is CAplus.

In order to solve the challenge that strong polar analyte protectants are not well performed in weak polar solvent systems, the solution of acetonitrile:dichloromethane = 2:1 (V/V) was chosen as weak polarity solvent system. The effects of 23 compounds as analyte protectants on the heights and shapes of chromatog. peaks of 31 aroma components were investigated. The chromatog. peaks of the aroma components in solvent added with these analyte protectants were compared with those in tobacco matrix. After optimizing the type, composition and concentration of the protectants, a suitable combination of analyte protectants was developed. In addition, 15 aroma components in tobacco (other than the 31 aroma components mentioned above) were chosen to verify the matrix compensation effect of the developed analyte protectant combination. The results showed that the suitable analyte protectants combination was malic acid (1000 mg/L) + 1,2-tetradecanediol (1000 mg/L). By adding the optimized analyte protectants combination into the solvent standard solution, a satisfactory matrix compensation effect was achieved. The linearity of the calibration curve for each aroma component was greatly improved, and the slope and linear correlation coefficient (r²) were basically consistent with the matrix-matched calibration curve. The matrix effect of aroma components in tobacco during GC/MS anal. was compensated by adding analyte protectants.

Yancao Keji published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10N4, Application of 2-Methoxynaphthalene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem