Month: December 2022

Liu, Zhen Gang published the artcileZrCl₄/Hantzsch 1,4-dihydropyridine as a new and efficient reagent combination for the direct reductive amination of aldehydes and ketones with weakly basic amines, Application of N-(4-Methoxybenzyl)pyridin-2-amine, the publication is Chinese Chemical Letters (2007), 18(4), 458-460, database is CAplus.

ZrCl₄/Hantzsch 1,4-dihydropyridine is a mild and highly efficient reagent combination for the direct reductive amination. Weakly basic amines such as anilines substituted by electron-withdrawing group and heteroaromatic amines can be reductively alkylated with electron rich aldehydes and ketones under mild conditions to form the secondary amines in excellent yields.

Chinese Chemical Letters 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, Application of N-(4-Methoxybenzyl)pyridin-2-amine.

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

Shao, Ailong published the artcileElectrochemical Intramolecular C-H/O-H Cross-Coupling of 2-Arylbenzoic Acids, COA of Formula: C8H11BO3, the publication is Chinese Journal of Chemistry (2018), 36(7), 619-624, database is CAplus.

A synthetic protocol to lactones, e.g. I, by electro-oxidative induced C-H activation of 2-arylbenzoic acids was developed using aqueous Na₂SO₄ as a cheap and green supporting electrolyte in 30%-90% yields. This reaction could be conducted on a gram scale with a good efficiency as well as showed high utility for natural product synthesis like Sabilactone.

Chinese Journal of Chemistry 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 C7H5ClN2S, COA of Formula: C8H11BO3.

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

Sun, Xiaobo published the artcileSynthesis and characterization of poly(1,4-phenylenevinylene) derivatives containing liquid crystalline oxadiazole groups, COA of Formula: C15H24O2, the publication is Journal of Applied Polymer Science (2004), 91(1), 396-403, database is CAplus.

Two novel poly(1,4-phenylenevinylene) (PPV) derivatives containing liquid crystalline oxadiazole side chains were prepared by a dehydrochlorination process. The homopolymer poly[2-methoxy-5-((2-methoxy-phenyl)-5-hexyloxy-phenyloxy-1,3,4-oxadiazole)-1,4-phenylenevinylene] (HO-PE₆) is insoluble in common solvents, whereas the copolymer poly[2-methoxy-5-((2-methoxy-phenyl)-5-hexyloxy-phenyloxy-1,3,4-oxadiazole)-(2-methoxy-5-(2′-ethylhexyloxy))-1,4-phenylenevinylene] (CO-PE₆) is soluble in common solvents such as chloroform, THF, and p-xylene. The mol. structure of CO-PE₆ was confirmed by FTIR, ¹H-NMR, UV-vis spectroscopy, and polarized light microscopy. CO-PE₆ showed a maximum emission at 556 nm in chloroform and at 564 nm in solid film, when excited at 450 nm. The maximum electroluminescence emission of the device indium-tin oxide (ITO)CO-PE₆/Al is at 555 nm. The turn-on voltage of LEDs based on CO-PE₆ and MEH-PPV is 6.5 and 8.5 V, resp. The electron mobility of CO-PE₆ is higher than that of MEH-PPV based on the results of current-voltage and electrochem. behavior of both MEH-PPV and CO-PE₆.

Journal of Applied Polymer Science 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 Al2H32O28S3, COA of Formula: C15H24O2.

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

Yan, Xiao-Biao published the artcileNi-catalyzed hydroalkylation of olefins with N-sulfonyl amines, Formula: C8H11NO, the publication is Nature Communications (2021), 12(1), 5881, database is CAplus and MEDLINE.

Herein, a reliable method for accessing α-branched amines RNHCH(R¹)(CH₂)₂R² (R = (4-methylphenyl)sulfonyl, (2,4,6-trimethylphenyl)sulfonyl; R¹ = Ph, 4-morpholinophenyl, furan-2-yl, etc.; R² = Ph, 3-fluorophenyl, 9H-fluoren-2-yl, etc.) via nickel-catalyzed hydroalkylation reactions was reported. Specifically, by using bis(cyclooctadiene)nickel (Ni(cod)₂) together with a phosphine ligand, a formal C(sp³)-H bond insertion reaction between olefins CH₂=CHR² and N-sulfonyl amines RNHCH₂R¹ without the need for an external hydride source was achieved. The amine not only provides the alkyl motif but also delivers hydride to the olefin by means of a nickel-engaged β-hydride elimination/reductive elimination process. This method provides a platform for constructing chiral α-branched amines (R/S)-RNHCH(R¹)CH₂CH₂R² by using a P-chiral ligand, demonstrating its potential utility in organic synthesis. Notably, a sulfonamidyl boronate complex formed in situ under basic conditions promotes ring-opening of the azanickellacycle reaction intermediate, leading to a significant improvement of the catalytic efficiency.

Nature Communications published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C19H15NO3, Formula: C8H11NO.

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

Li, Li-dong published the artcileStudy of ¹⁷O-NMR chemical shifts of substituted methylphenylether, SDS of cas: 2944-47-0, the publication is Bopuxue Zazhi (2002), 19(3), 289-292, database is CAplus.

This paper provides a equation: δ_cal = δ₀ + Δo + Δm + Δp for calculation of ¹⁷0 chem. shifts of substituted methylphenylethers. 20 Substituent parameters are gained by linear least square regression anal. The calculated results are checked regressively by 101 ¹⁷O-NMR chem. shifts of 78 substituted methylphenylethers. The confidence limit is 99.5% and calculating errors for about 90% of the compounds are less than 5 ppm (with relative errors of 0.5%).

Bopuxue Zazhi 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, SDS of cas: 2944-47-0.

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

Mo, Yi published the artcileStudy on highly/accurate quantum chemical calculations carried for a local region of a system, Computed Properties of 16332-06-2, the publication is Wuli Huaxue Xuebao (2002), 18(8), 716-720, database is CAplus.

The method proposed by us to carry out high accurate d. functional calculations in a local region of a large system was applied to the calculation of a series of different type of mols. and the data such as Mulliken charges, bond lengths, bond dissociation energies, the first ionization potentials and electronegativities were obtained. High accuracy calculations for the same set of mols. and the correspondent model mols. with a hydrogen atom replacing the part of a mol. surrounding the local region were also carried out with the conventional method for comparison. It is found that the results obtained by the local high accuracy calculation are in good agreement with those obtained by the conventional high accuracy calculation while the calculated results for the model mols. show larger deviation. The results presented in this paper show further that the local high accuracy calculation method proposed by us is practical and valuable.

Wuli Huaxue Xuebao published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Computed Properties of 16332-06-2.

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

Ku, Conghao published the artcileOne-step construction of mesoporous cyano and sulfur co-modified carbon nitride for photocatalytic valorization of lignin to functionalized aromatics, COA of Formula: C9H10O4, the publication is Applied Surface Science (2022), 153266, database is CAplus.

Herein, mesoporous cyano and sulfur co-modified carbon nitride (MCSCN) is one-step constructed for the first time by a simple strategy using urea and trithiocyanuric acid as precursors. Trithiocyanuric acid can act as pore-fabricating units to form mesopores, meanwhile introduce cyano groups and sulfur atoms into carbon nitride. The constructed mesoporous structures effectively reduce the mass transfer resistance of macromol. lignin in the photocatalytic reaction process. The synergistic effect of the modified cyano groups and sulfur atoms significantly improves the photocatalytic valorization effect of waste lignin to functionalized aromatics As a representative of waste lignin, waste Camellia oleifera shell (WCOS) lignin can be efficently photocatalytic transformed to monophenolic compounds by MCSCN, and each gram of WCOS lignin can harvest 116.2 mg of functionalized aromatics, which is about 7 times higher than that by traditional g-C₃N₄ photocatalyst (16.7 mg/g).

Applied Surface Science 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, COA of Formula: C9H10O4.

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

Wang, Chao published the artcileEffects of electrostatic spray drying on sensory qualities, aroma profile and microstructural features of instant Pu-erh tea, Category: ethers-buliding-blocks, the publication is Food Chemistry (2022), 373(Part_B), 131546, database is CAplus and MEDLINE.

The sensory qualities, aroma profile, and microstructural features of instant Pu-erh teas (IPTs) produced by electrostatic spray drying (ESD) were evaluated by sensory and instrumental analyses and compared with those produced by other drying methods (freeze-drying [FD], vacuum drying [VD], and conventional spray drying [CSD]). The sensory qualities of ESDIPT were similar to those of FDIPT, and better than those of VDIPT and CSDIPT. Eighty-eight volatiles were detected in all IPTs, and 45 odor-active compounds were captured. Most of their OAVs were higher in ESDIPT than in VDIPT and CSDIPT but were lower than those in FDIPT. Dihydro-β-ionone had the highest OAV. Aroma recombination experiments were performed to verify the identification results. ESDIPT was present in the shape of microspheres with many regular concave surfaces, which was different from those treated by other drying methods. In terms of sensory quality and productivity, ESD would be a potential method for IPT production

Food Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C20H17FO4S, Category: ethers-buliding-blocks.

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

Wang, Chao published the artcileSalting-out re-distillation combined with sensory-directed analysis to recover odor-active compounds for improving the flavor quality of instant Pu-erh tea, Safety of 1,2-Dimethoxybenzene, the publication is Food Chemistry: X (2022), 100310, database is CAplus and MEDLINE.

The objective of this study was to develop an effective recovery technol. of odor-active compounds (OACs) to improve the flavor quality of instant Pu-erh tea (IPT) based on their released behaviors. Salting-out re-distillation (SRD) combined with sensory-directed anal. was developed. The contributing factors, including the soaking time of tea, recovery volume of condensed water of first distillation, amount of sodium chloride, recovery volume of condensed water of SRD, and re-use times of sodium chloride, were studied systematically. Under optimized conditions, 41 OACs were recovered in the first distillation, and the total recovery rate was 83.94%. Forty-one OACs were recovered via SRD, and the total recovery rate reached 72.29%, significantly better than membrane method (33.46%). The IPT prepared by adding OACs that recovered via SRD showed strong aroma attributes intensities and good coordination. This developed method can provide a more effective scheme to improve the flavor quality of IPT.

Food Chemistry: X published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C13H16O2, Safety of 1,2-Dimethoxybenzene.

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

Zhang, Wenyu published the artcileFT-IR study of propylene oxide adsorption on metal oxides, Application of 2-Methoxypropan-1-ol, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2013), 169-173, 6 pp., database is CAplus.

The adsorption of propylene oxide (PO) onto MgO, ZnO and Al₂O₃ was investigated by using in situ-IR measurements. Detailed mechanisms for PO adsorption onto these metal oxides are proposed. It was found that the PO epoxide ring exhibits two opening tendencies, depending on the acid-base properties of the metal oxide. PO adsorbed onto MgO is preferentially opened at the O-C(1) bond. The epoxide ring provides two ways to open, at the O-C(1) or the O-C(2) bond on Al₂O₃. PO adsorbed onto ZnO showed no chem. adsorption on its surface.

Advanced Materials Research (Durnten-Zurich, Switzerland) 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 C15H24S, Application of 2-Methoxypropan-1-ol.

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