Tag: M.W=100-150

de Oliveria, Lucilene L. published the artcileBis(pyrazolyl)thioether/amine-chromium(III) catalysts bearing pendant O- and N-donor group for oligomerization and polymerization of ethylene, Recommanded Product: (2-Methoxyphenyl)methanamine, the publication is Applied Organometallic Chemistry (2022), 36(4), e6609, database is CAplus.

In this work, a new family of chromium complexes supported by bis(pyrazolyl)thioether/amine ligands containing pendant O- and N-donor groups CrCl₃{S-bis[(3,5-DMPz)methyl]sulfide} (2a), CrCl₃{N-bis[(3,5-DMPz)benzylamine]} (2b), CrCl₃{N-bis[(3,5-DMPz)butylamine]} (2c), [CrCl₂{N-bis[(3,5-DMPz)methyl][(2-pyridinyl)methyl]amine}]Cl (2d), [CrCl₂{N-bis[(3,5-DMPz)methyl][quinoline]amine}]Cl (2e), [CrCl₂{N-bis[3,5-DMPz-methyl][EtNMe₂]amine}]Cl (2f), CrCl₃{N-bis[(3,5-DMPz)methyl][2-methoxyphenyl]amine} (2g), and CrCl₃{N-bis[2-(3,5-DMPz)methyl][(2-pyridyl)ethyl]amine} (2h) were synthesized and characterized by elemental anal. and Fourier transform IR spectroscopy (FTIR) spectroscopy. D. functional theory (DFT) calculations demonstrated that the pendant group as well as the spacer between the N-donor group and the central amine nitrogen have strong influence on the coordination motif of the ligand. Thus, 1d–1f act as tetradentate ligands while 1g and 1h preferably coordinated to the chromium metal center in a tridentate [N,N,N] mode fashion. The catalytic performance of 2a–2h is strongly influenced by the nature of the central bridging atom (S, N) as well as the pendant O- and N-donor group. Upon activation with methylaluminoxane (MAO), chromium precatalysts 2a–2c, 2e, and 2f generated active systems producing oligomers ranging from C₄ to C₁₂⁺ with a high selectivity for α-olefins (>82.4%). On the other hand, precatalysts bearing pyridine (2d and 2h) and methoxy (2g) functionalized amine bis (pyrazolyl) ligands exclusively produce polyethylene (PE) with activities in the range of 107.2-372.0 kg of PE·mol[Cr]^-1 h^-1.

Applied Organometallic Chemistry 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 C8H11NO, Recommanded Product: (2-Methoxyphenyl)methanamine.

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

Goh, Jeffrey published the artcileCatalyst-free C-N bond formation under biocompatible reaction conditions, Formula: C8H11NO, the publication is Green Chemistry (2022), 24(8), 3321-3325, database is CAplus.

A C-N bond formation reaction under biocompatible conditions for the amination of allenic ketone compounds to access a diversity of β-keto enamines R¹C(O)HC=CMeNHR² [R¹ = Ph, cyclopentyl, 4-MeOC₆H₄, etc.; R² = Ph, cyclohexyl, Bn, etc.] was developed. This reaction was atom economical, green and highly regioselective and works well with many structurally important amines such as amino sugar and amino acid esters or peptides. A wide array of β-keto enamines R¹C(O)HC=CMeNHR² was obtained in modest to excellent yields with wide functional group tolerance using this protocol. A gram-scale synthesis of an anti-microbial agent was also realized using this strategy under green reaction conditions.

Green Chemistry 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 C8H11NO, Formula: C8H11NO.

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

Yamamoto, Yuki published the artcileExcellent Catalytic Performances of a Au/C-CuO Binary System in the Selective Oxidation of Benzylamines to Imines under Atmospheric Oxygen, SDS of cas: 6850-57-3, the publication is ACS Omega (2021), 6(50), 34339-34346, database is CAplus and MEDLINE.

A green method of the oxidation of benzylamines to imines was developed using a novel binary system of Au/C-CuO. This system was evaluated under atm. oxygen, and the corresponding imines were obtained in up to 100% yields by loading 0.006 mol % of Au/C and 1.25 mol % of CuO under mild conditions. This system was also successfully applied to the syntheses of N-containing functional mols., as well as that of imines on the scale of several grams. Furthermore, the turnover number of the system (more than 8000 times on a gold basis) as well as its ability to be reused more than 10 times for benzylamine oxidation demonstrates the excellent durability and recyclability of the developed system.

ACS Omega 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 C25H34N4O2S, SDS of cas: 6850-57-3.

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

Tatematsu, Ryoichi published the artcilePreparation and properties of some fluoroalcohol-ethylene oxide adducts, Application In Synthesis of 2358-54-5, the publication is Yukagaku (1977), 26(6), 367-71, database is CAplus.

Surfactants such as CF3CF2CH2O(C2H4O)3H (I) [63693-17-4] and CF3CH2OCH2CH2OH [2358-54-5] were prepared A mixture of 10 g CF3CF2CH2OH [422-05-9], 11.9 g ethylene oxide [75-21-8], and 0.3 mL 50% aqueous NaOH was heated at 80-5° for 2 h to prepare 32.8% I.

Yukagaku published new progress about 2358-54-5. 2358-54-5 belongs to ethers-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-(2,2,2-Trifluoroethoxy)ethanol, and the molecular formula is C40H35N7O8, Application In Synthesis of 2358-54-5.

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

Sato, Eisuke published the artcileElectro-oxidative Trimerization of 1,2-Dimethoxybenzene: Reductive Workup Strategy and Alternating Current Electrolysis to Peel off the Precipitated Radical Cation Ion Pair, Safety of 1,2-Dimethoxybenzene, the publication is Chemistry Letters (2022), 51(6), 629-632, database is CAplus.

An oxidative trimerization of catechol and its derivatives affords triphenylene derivatives Under these electrochem. conditions, overoxidn. results in precipitation of a radical cation pair of triphenylenes with a counter anion, which prevents efficient synthesis. A reductive workup strategy, in which the precipitate is peeled from the electrodes, affords the trimer in good yield. Furthermore, a.c. (AC) electrolysis provides a convenient synthesis without any precipitation

Chemistry Letters 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 C8H10O2, Safety of 1,2-Dimethoxybenzene.

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

Berkowitz, Alex J. published the artcileSynthesis of α-Tropolones through Autoxidation of Dioxole-Fused Cycloheptatrienes, Name: 1,2-Dimethoxybenzene, the publication is Journal of Organic Chemistry (2022), 87(7), 4499-4507, database is CAplus and MEDLINE.

Herein, we describe the formation of tropolones through the autoxidation of Buchner reaction-derived cycloheptatrienes. The reaction is exceptionally simple procedurally, as it involves blowing a stream of compressed air over the cycloheptatriene, and the products can be obtained without any need for chromatog. The chem. works specifically on dioxolane-fused systems or close variants, and substitution patterns are also important. A radical-based mechanistic hypothesis is put forward to explain these results. Finally, we demonstrate the utility of the overall process in the synthesis of amide-appended tropolones and an isomer of stipitatic acid.

Journal of Organic 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 C8H10O2, Name: 1,2-Dimethoxybenzene.

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

De Flaviis, Riccardo published the artcileQuantitatively unravelling the effect of altitude of cultivation on the volatiles fingerprint of wheat by a chemometric approach, Recommanded Product: 1,2-Dimethoxybenzene, the publication is Food Chemistry (2022), 131296, database is CAplus and MEDLINE.

The cultivation of crops at high elevations in response to climate changes leads to modifications in the volatile organic compounds (VOCs) profile. The VOCs profile of common and durum wheat grown in different fields sited at three different elevations over two years was analyzed. Partial least square anal. (PLS2) evidenced the effect of altitude on VOCs variance that was hidden among others (cultivation year, species, farm) not correlated with it. PLS1 anal. was further carried out using VOCs as explanatory variables and altitude as dependent variable to find the linear combination of VOCs able to continuously predict the altitude of samples. Selected VOCs, related to biotic, abiotic and oxidative stress conditions, could describe the changes in VOCs profile of wheat induced by altitude increase. Furthermore, common and durum wheat showed different responses to stress at high altitude. These results could be considerably useful for wheat product classification and authentication.

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 C8H10O2, Recommanded Product: 1,2-Dimethoxybenzene.

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

De Flaviis, Riccardo published the artcileCould environmental effect overcome genetic A chemometric study on wheat volatiles fingerprint, Application In Synthesis of 91-16-7, the publication is Food Chemistry (2022), 131236, database is CAplus and MEDLINE.

A deeper knowledge of the causes of volatile organic compounds (VOCs) variance in wheat is crucial for quality improvement and control of its derivatives The VOCs profile of common and durum wheat kernels grown in different fields sited at different altitudes over two years was analyzed and 149 compounds were identified by gas chromatog.-mass spectrometry. Principal component anal. evidenced that the year of cultivation was the highest source of VOCs variance. The effects of wheat origin, as described by the cultivation site, its elevation, and species were further investigated by PLS-DA, that permitted to correctly classify wheat of different origin on the basis of its VOCs profile. The importance of the different effects was investigated by multidimensional test and resulted: year of cultivation > field of cultivation > species > altitude. Findings suggest that environmental conditions are more important than species in the determination of the VOCs variance of wheat.

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 C8H10O2, Application In Synthesis of 91-16-7.

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

Marrot, Laetitia published the artcileCharacterization of the compounds released in the gaseous waste stream during the slow pyrolysis of hemp (Cannabis sativa L.), Recommanded Product: 1,2-Dimethoxybenzene, the publication is Molecules (2022), 27(9), 2794, database is CAplus and MEDLINE.

This study aims to characterize and valorize hemp residual biomass by a slow pyrolysis process. The volatile byproducts of hemp carbonization were characterized by several methods (TGA, UV-VIS, TLC, Flash Prep-LC, UHPLC, QTOF-MS) to understand the pyrolysis reaction mechanisms and to identify the chem. products produced during the process. The obtained carbon yield was 29%, generating a gaseous stream composed of phenols and furans which was collected in four temperature ranges (F1 at 20-150°C, F2 at 150-250°C, F3 at 250-400°C and F4 at 400-1000°C). The obtained liquid fractions were separated into subfractions by flash chromatog. The total phenolic content (TPC) varied depending on the fraction but did not correlate with an increase in temperature or with a decrease in pH value. Compounds present in fractions F1, F3 and F4, being mainly phenolic mols. such as guaiacyl or syringyl derivatives issued from the lignin degradation, exhibit antioxidant capacity. The temperature of the pyrolysis process was pos. correlated with detectable phenolic content, which can be explained by the decomposition order of the hemp chem. constituents. A detailed understanding of the chem. composition of pyrolysis products of hemp residuals allows for an assessment of their potential valorization routes and the future economic potential of underutilized biomass.

Molecules 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 C8H10O2, Recommanded Product: 1,2-Dimethoxybenzene.

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

Zheng, Jie published the artcileSynthesis of Antimicrobial Benzo[1,2,4]triazoloazepinium Salts and Tetrahydronaphtho[1,2-e][1,2,4]triazines by Polar [3⁺ + 2] and [4 + 2]-Cycloaddition Reactions, Quality Control of 91-16-7, the publication is Journal of Organic Chemistry (2022), 87(1), 464-478, database is CAplus and MEDLINE.

Novel annulated azaheterocycles of benzo[1,2,4]triazoloazepine and tetrahydronaphtho[1,2-e][1,2,4]triazine derivatives have been synthesized. Treatment of 2-diazenyl-1,2,3,4-tetrahydronaphthalen-2-yl acetates with BF₃·Et₂O generates 1-aza-2-azoniaallenium cation intermediates (or azocarbenium ions), which are intercepted by nitriles via cascade polar [3⁺ + 2]-cycloaddition/rearrangement reactions to afford benzo[1,2,4]triazoloazepinium salts. These literature unprecedented fused tricycle compounds have been shown to exhibit antimicrobial activity against Gram-pos. Staphylococcus aureus with in silico docking studies, suggesting that they may exhibit their antibiotic activity through inhibition of DNA gyrase. Addnl., when Et 2-(1-acetoxy-1,2,3,4-tetrahydronaphthalen-2-yl)diazene-1-carboxylate is employed, the reaction with BF₃·Et₂O produces 1,2-diaza-1,3-diene, which reacts with nitriles via a diaza-Diels-Alder reaction with inverse electron demand, leading to Et tetrahydronaphtho[1,2-e][1,2,4]triazine carboxylates. The DFT calculation has been performed to further prove the D-A reaction speculation.

Journal of Organic 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 C20H40O2, Quality Control of 91-16-7.

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