Category: ethers-buliding-blocks

Shigeno, Masanori published the artcileOrganic superbase t-Bu-P4-catalyzed demethylations of methoxyarenes, Application In Synthesis of 93-04-9, the publication is Organic Chemistry Frontiers (2022), 9(14), 3656-3663, database is CAplus.

The organic superbase t-Bu-P4 catalyzes the demethylation reactions of methoxyarenes ROMe [R = 4-cyanophenyl, 1-oxo-2,3-dihydro-1H-inden-5-yl, 1-benzothiophen-5-yl, etc.] in the presence of alkanethiol and hexamethyldisilazane was reported. The system can efficiently convert a variety of substrates, including electron-deficient, -neutral, and -rich substrates and heteroaromatic substrates, and displays excellent functional group tolerance. Computational studies show that the high reactivity achieved by t-Bu-P4 is due to the formation of the nucleophilic naked thiolate species.

Organic Chemistry Frontiers 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 C14H10O4, Application In Synthesis of 93-04-9.

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

Hirao, Ichiro published the artcileCondensation of anisyl alcohol or benzyl alcohol with aromatic amines, Synthetic Route of 52818-63-0, the publication is Yakugaku Zasshi (1954), 853-5, database is CAplus.

A mixture of 7 g. p-MeOC₆H₄CH₂OH (I), 5 g. 2-aminopyridine (II), 20 g. xylene, and 4 g. KOH refluxed 21 hrs., extracted with 10% HCl, KOH added to pH 7, and the product recrystallized from dilute MeOH give 8.9 g. (80%) 2-(p-methoxybenzylamino)pyridine (III), m. 108°, or 5.5 g. I, 3.5 g. II, 8 g. PhMe, and 4 g. KOH refluxed 12 hrs. and the product treated as above give 4.8 g. (62%) III, m. 123-4°. I (7 g.), 4.7 g. PhNH₂, 20 g. xylene, and 4 g. KOH refluxed 21 hrs., and the product precipitated with 10% HCl, dissolved in KOH, and recrystallized from MeOH gives 5 g. (51%) p-MeOC₆H₄CH₂NHPh, m. 63-4°. Similarly, 20 g. PhCH₂OH, 6 g. 2-aminopyrimidine, 40 g. PhMe, and 7 g. KOH refluxed 10 hrs. give 16 g. (44%) 2-benzylaminopyrimidine, m. 79-81°; 8 g. PhCH₂OH, 6 g. 2-H₂NC₅H₄N, 4 g. PhMe, and 15 g. PhMe refluxed 13 hrs. give 11 g. (81%) 2-PhCH₂NHC₅H₄N, m. 95-6°; 10.8 g. PhCH₂OH, 9.3 g. PhNH₂, 40 g. xylene, and 8 g. KOH refluxed 21 hrs. give 1.47 g. PhCH₂NHPh.HCl, m. 214-5°.

Yakugaku Zasshi 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, Synthetic Route of 52818-63-0.

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

Yang, Chunhe published the artcilePolymer light-emitting electrochemical cells with 1-methoxy-4-(2-ethylhexyloxy)benzene as salt carrier, Recommanded Product: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, the publication is Synthetic Metals (2001), 124(2-3), 449-453, database is CAplus.

The electro-active, 1-methoxy-4-(2-ethylhexyloxy)benzene (MEH-benzene) is employed as ion carrier and redox shuttle in the polymer light-emitting electrochem. cell (LEC). The corresponding LECs with MEH-PPV can be driven within 10 V without failure. The LEC characteristics are clearly shown by the current-voltage curves and the ac impedance spectroscopy.

Synthetic Metals published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C7H5Br2F, Recommanded Product: 1-((2-Ethylhexyl)oxy)-4-methoxybenzene.

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

Wang, Yinling published the artcileCeCl₃-promoted simultaneous photocatalytic cleavage and amination of Cα-Cβ bond in lignin model compounds and native lignin, SDS of cas: 183303-74-4, the publication is CCS Chemistry (2020), 2(3), 107-117, database is CAplus.

It remains challenging to achieve valuable platform chems. from lignin because of its complicated polymeric structure and inherent inert chem. activities. So far, only a few examples have been reported for the selective cleavage of C-C bonds in lignin due to their intrinsic inertness and ubiquity. Here, we present a simple and com. available cerium(III) chloride (CeCl₃)-promoted photocatalytic depolymerization strategy to realize the simultaneous cleavage and amination of Cα-Cβ bond in a variety of lignin model compounds at room temperature This procedure does not require any pretreatments and breakdown of C-O bonds or loss of γ-CH₂OH group to generate aldehydes (up to 97%) and N-containing products (up to 95%) in good to excellent yields. Addnl., this CeCl₃-based photocatalyst system could maintain excellent catalytic performance even after 10 sequential cycles with new starting materials. Moreover, this approach realizes the precise control over the reaction via switching the external light stimuli on/off. Further, this method is effective for the depolymerization of real lignin, thus affording the corresponding cleavage and amination products of Cα-Cβ bonds.

CCS Chemistry 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 C2H4ClNO, SDS of cas: 183303-74-4.

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

Cao, Ying published the artcileSmart anticorrosive epoxy coating based on environmental-stimuli-responsive copolymer assemblies for controlled release of corrosion inhibitors, Related Products of ethers-buliding-blocks, the publication is Macromolecular Materials and Engineering (2022), 307(7), 2100983, database is CAplus.

Inspired by the various applications of self-assembled amphiphilic polymers in aqueous solution, a novel ”semi-amphiphilic” copolymer is designed, which can self-assemble in organic systems by taking advantage of the compatibility difference between epoxy and the units with different structures in the polymer chains. A novel kind of polymer, poly(syringaldehyde methacrylate)-co-poly(dopamine methacrylate) is prepared by reversible addition-fragmentation chain transfer polymerization, which contains aldehyde groups and is further used to prepare the polymer/guanine conjugate by forming the Schiff base. The polymer/guanine conjugate is semi-amphiphilic, since the compatibility between dopamine methacrylate unit and epoxy is better than that between syringaldehyde methacrylate and epoxy, and therefore assemblies are formed in the organic system when it is added into the epoxy resin to prepare the anti-corrosive coating. The imine linkage is responsible for the pH-controlled release of the corrosion inhibitors, namely guanine, from the core of the assemblies. The self-assembled behaviors of the semi-amphiphilic copolymer in epoxy are investigated by dynamic light scattering and SEM. The stable encapsule and controlled-release of the inhibitors are confirmed by UV spectrophotometry. The properties of the smart coatings are comprehensively studied.

Macromolecular Materials and Engineering 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, Related Products of ethers-buliding-blocks.

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

Fan, Ju-di published the artcileAnalysis on the chemical compounds of essential oil from Centipeda minima in Guizhou by simultaneous distillation and extraction method, Synthetic Route of 2944-47-0, the publication is Anhui Nongye Kexue (2009), 37(15), 6986-6987, 6991, database is CAplus.

The objective of this study was to explore the chem. composition of essential oil from Centipeda min. (L) A.Br.et Aschers in Guizhou and provide the basis for its further exploitation and utilization. The essential oil of C. min. was extracted by simultaneous distillation and extraction and analyzed by gas chromatog.-mass spectrometry. The relative contents of each component in the essential oil were obtained by normalization of peak areas. Results show that 55 compositions were identified which added up to96.45% in the essential oil. It was concluded that the main compositions of essential oil from C. min. were trans-chrysanthenyl acetate (62.46%) and beta-bisabolene(4.69%), thymol (3.88%),verbenol(3.03%), 1,1,5,6,6,9,9-heptamethyl-10-methylene-spiro[2.7]dec-4-ene and carvacrol(2.57%).

Anhui Nongye Kexue published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Synthetic Route of 2944-47-0.

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

Lue, Xiaodan published the artcileSynthesis and photoluminescence properties of poly(2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene-co-styrene) copolymers, COA of Formula: C15H24O2, the publication is Polymer Science, Series A (2011), 53(5), 403-408, database is CAplus.

A series of conjugated and non-conjugated copolymers of poly(2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene-co-styrene) were synthesized via a typical chlorine precursor route. The obtained copolymers were characterized by FTIR spectra, UV-Vis spectra, ¹H NMR, and GPC. The results obtained indicated that the introduction of non-conjugated PS segments in MEH-PPV led to the interruption of conjugation structure and shortened the effective conjugated length, by which the optical properties of the conjugated polymer can be adjusted.

Polymer Science, Series A published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, COA of Formula: C15H24O2.

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

Vasiliev, A. D. published the artcileCrystal structure of bis(α,α’-dithio-bis(formamidinium)) bis(μ₂-chloro)hexachlorodimercurate(II), SDS of cas: 14807-75-1, the publication is Russian Journal of Inorganic Chemistry (2013), 58(11), 1298-1301, database is CAplus.

The crystal and mol. structure of bis(α,α’-dithio-bis(formamidinium)) bis(μ₂-chloro)hexachlorodimercurate(II) C₄H₁₆Hg₂Cl₈N₈S₄ (I), where α,α’-dithio-bis(formamidine) is C₂H₆N₄S₂, was solved. Crystals are monoclinic, a 8.6417(6), b 14.648(1), c 10.2111(8) Å, β 104.949(1)°, V = 1248.8(2) ų, space group P2₁/n, Z = 4. The crystal structure is built of HgCl₄^2- ions linked via inversion centers into [Hg₂Cl₈]^4- pairs and C₂H₈N₄S₂²⁺ cations. [Hg₂Cl₈]^4- anions and C₂H₈N₄S₂²⁺ cations form alternating layers linked by N-H^…Cl H bonds into a framework structure.

Russian Journal of Inorganic Chemistry published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C18H24N6O6S4, SDS of cas: 14807-75-1.

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

Kaal, Joeri published the artcileFingerprinting macrophyte Blue Carbon by pyrolysis-GC-compound specific isotope analysis (Py-CSIA), Category: ethers-buliding-blocks, the publication is Science of the Total Environment (2022), 155598, database is CAplus and MEDLINE.

There is a need for tools to determine the origin of organic matter (OM) in Blue Carbon Ecosystems (BCE) and marine sediments to (1) facilitate the implementation of Blue Carbon strategies into carbon accounting and crediting schemes and (2) decipher changes in ecosystem condition over decadal to millennial time scales and thus to understand and predict the stability of BCE in a changing world. Pyrolysis-GC-compound specific isotope anal. (Py-CSIA) is applied for the first time in marine environments and BCE research. We studied Australian mangrove, tidal marsh and seagrass sediments, in addition to potential sources of OM (Avicennia, Posidonia, Zostera, Sarcocornia, Ecklonia and Ulva species and seagrass epiphytes), to identify precursors of different biomacromol. constituents (lignin, polysaccharides and aliphatic structures). Firstly, the link between bulk δ¹³C and δ¹³C reconstructed from compound-specific δ¹³C showed that the pyrolysis approach allows for the isotopic screening of a representative portion of the OM. Secondly, for all samples, the C isotope fingerprint of the carbohydrate products (plant polysaccharides) was the heaviest (¹³C enriched), followed by lignin and aliphatic products. The differences in δ¹³C among macromols. and the overlap in δ¹³C among putative sources reflect the limitations of bulk δ¹³C analyses for deciphering OM provenance. Thirdly, phanerogams specimen had the heaviest carbohydrate and lignin, confirming that seagrass-derived lignocellulose can be traced based on δ13C. Consistent differences for individual compounds were identified between seagrasses and between Avicennia and Sarcocornia using Py-CSIA. Fourth, ecosystem shifts (colonization of seagrass habitats by mangrove) on millenary time scales, hypothesized in previous studies on the basis of bulk δ13C and Py-GC-MS, were confirmed by Py-CSIA. We conclude that Py-CSIA is useful in Blue Carbon research to decipher OM sources in marine sediments, identify ecosystem transitions in palaeoenvironmental records, and to understand the role of different OM compounds in Blue Carbon storage.

Science of the Total Environment 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, Category: ethers-buliding-blocks.

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

Li, Fangzheng published the artcileEfficient Stereoselective Synthesis of a Key Chiral Aldehyde Intermediate in the Synthesis of Picolinamide Fungicides, Formula: C21H37BO, the publication is Organic Process Research & Development (2019), 23(10), 2253-2260, database is CAplus.

A highly stereoselective and efficient synthesis of (4S,5S,6S)-6-(benzyloxy)-5-phenoxy-4-propoxyheptanal, a key intermediate for syntheses of picolinamide fungicides, is described in this report. The synthesis features a scalable allylpropyl ether preparation, an efficient synthesis of the C1-C3 anti,syn-(S,S,S) stereotriad via a highly diastereoselective allylboration, and Cu-catalyzed phenylation of a sterically hindered secondary alc. with BiPh₃(OAc)₂ followed by highly regioselective hydroformylation with the formation of a linear aldehyde. Excellent overall route efficiency was achieved (six steps and 39% yield) starting from readily available and inexpensive (S)-Et lactate.

Organic Process Research & Development 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, Formula: C21H37BO.

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