Category: 91-16-7

On July 31, 2020, Yu, Wen-Shuai; Wu, Ze-Nong; Qiu, Zeng-Feng; Zhao, Chun-Jie; Zhang, Fu-Li; Yang, Zhe-Zhou published an article.Category: ethers-buliding-blocks The title of the article was One-Pot Synthesis of Papaverine Hydrochloride and Identification of Impurities. And the article contained the following:

A one-pot synthesis of papaverine hydrochloride with 99.6% purity was performed using xylene as solvent for the entire process. The critical parameters of each step, as well as the impurities generated, were identified. The overall yield was improved to 63%. The proposed synthetic procedure was suitable for industrial production The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Category: ethers-buliding-blocks

The Article related to papaverine hydrochloride preparation, Alkaloids: Alkaloids Containing One Nitrogen Atom In A Ring and other aspects.Category: ethers-buliding-blocks

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On November 1, 2021, Sun, Haoran; Luo, Zhongyang; Wang, Wenbo; Li, Simin; Xue, Shuang published an article.Product Details of 91-16-7 The title of the article was Porosity roles of micro-mesostructured ZSM-5 in catalytic fast pyrolysis of cellulolytic enzyme lignin for aromatics. And the article contained the following:

Cellulolytic enzyme lignin could be utilized to produce aromatic-rich bio-oil in the catalytic fast pyrolysis (CFP) process, in which strong-acidic ZSM-5 is often used as the catalyst. The introduction of mesopores into conventional ZSM-5 catalysts can improve the diffusion of heavy components and thus enable the modulation of pyrolysis products. To investigate the effect of mesoporous structure parameters on the diffusion of heavy phenols and the regulation of pyrolysis products by different types of pore structures, three different mesoporous ZSM-5 were prepared (core-shell, hierarchical, composites), with textural properties being compared in detail. The structural parameters were adopted to analyze the relationship between mesopores distribution and catalytic performance, revealing the significant effect of equivalent mesopore size. Among the prepared catalysts, a micro-mesostructured composite zeolite (ZMA) with internal hierarchical pores and ununiform mesolayer shell had a suitable mesostructure, of which the interconnected meso-channels improved the accessibility of inner acidic sites. Also, it was optimum to balance aromatic yield (above 7.5 wt%) and the product distribution (MAHs/PAHs approaching 6), revealing that its moderate equivalent pore size maintained a certain shape-selectivity to suppress PAHs formation. It was further shown that the applicable catalyst to lignin ratio (C/L) ranges differed with various mesostructures, as ZMA and hierarchical samples were suitable for higher and lower ratios, resp. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Product Details of 91-16-7

The Article related to zsm cellulolytic enzyme lignin aromatic catalytic fast pyrolysis porosity, Electrochemical, Radiational, and Thermal Energy Technology: Other and other aspects.Product Details of 91-16-7

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On December 25, 2020, Tran, Quoc Khanh; Han, Sangjin; Ly, Hoang Vu; Kim, Seung-Soo; Kim, Jinsoo published an article.Recommanded Product: 91-16-7 The title of the article was Hydrodeoxygenation of a bio-oil model compound derived from woody biomass using spray-pyrolysis-derived spherical γ-Al2O3-SiO2 catalysts. And the article contained the following:

In this study, spherical γ-Al2O3-SiO2 catalysts with various Al/Si ratios were prepared by combining the sol-gel and spray pyrolysis (SP) methods. The effectiveness of the product catalysts was then tested via the hydrodeoxygenation (HDO) of guaiacol, a model compound of bio-oil obtained from the pyrolysis of lignocellulosic biomass. Our results showed that the γ-Al2O3-SiO2 catalyst with a 50:50 Al/Si ratio after calcination at 450°C exhibited the highest guaiacol conversion (81.79%) at a reaction temperature of 300°C, atm. pressure, and a weight hourly space velocity (WHSV) of 6.5 h-1. During guaiacol HDO, the carbon-oxygen cleavage and Me group transfer reactions occurred on the γ-Al2O3-SiO2 catalyst, which converted the guaiacol into the resp. deoxygenated products, including 2,6-xylenol, 2,3,5,6-tetra-Me phenol, pentamethyl benzene, and hexamethyl benzene. The reaction pathways for the conversion of guaiacol HDO were also proposed in this study. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Recommanded Product: 91-16-7

The Article related to alumina silica guaiacol hydrodeoxygenation woody biomass spray pyrolysis, Electrochemical, Radiational, and Thermal Energy Technology: Other and other aspects.Recommanded Product: 91-16-7

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On November 30, 2021, Liu, Jinguang; Liu, Yuqian; Wang, Anqi; Dai, Zhen; Wang, Rui; Sun, Hui; Strappe, Padraig; Zhou, Zhongkai published an article.Safety of 1,2-Dimethoxybenzene The title of the article was Characteristics of moisture migration and volatile compounds of rice stored under various storage conditions. And the article contained the following:

Yellowing is associated with the changes in rice quality during storage. This study revealed that the increased yellowness of rice was highly associated with the moisture content of rice during storage. The hysteresis loop formed by sorption and desorption curves showed that the water loss of japonica rice was the largest, suggesting the internal structure of japonica rice was more vulnerable to be damaged. The heat enthalpy of rice increased first, and then decreased during yellowing, indicating the changes in the corresponding rice structure. The changes in the moisture migration were monitored by low-field NMR, and the data showed that the content of tightly bound water decreased during yellowing, and the tightly bound water transferred to higher fluidity in medium moisture content (MMC) and higher moisture content (HMC) sample. The concentration of most esters, ketones and alcs. of rice was increased during yellowing in a lower moisture content (LMC) sample. This study revealed that the yellowing process could inhibit the release of some volatiles for MMC and HMC samples. The increased 1,2-dimethoxy-benzene and phenol in HMC sample during yellowing were the characteristic volatiles for the highest yellowed rice samples. This study may highlight the further understanding of rice yellowing mechanism. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Safety of 1,2-Dimethoxybenzene

The Article related to yellowing hysteresis desorption storage japonica, Food and Feed Chemistry: Packaging, Preservation, and Processing and other aspects.Safety of 1,2-Dimethoxybenzene

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On November 30, 2020, Bolt, Ya. V.; Tsarkova, A. S.; Baleeva, N. S. published an article.Formula: C8H10O2 The title of the article was 6,7-Dialkoxy-Benzothiophene Derivatives as the Basis for Synthesis of Fluorescent Sensors for Reactive Oxygen Species. And the article contained the following:

Abstract: We suggest the use of the 6,7-dialkoxy-benzothiophene derivatives as the basis for synthesis of fluorescent sensors for reactive oxygen species. The corresponding dioxide, a potential product of oxidation, that might be generated during ROS detection, was synthesized. We have established that benzothiophene derivatives could be successfully used for synthesis of fluorescent sensors, due to the noticeable shift of the absorption and emission maxima that occurs during oxidation The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Formula: C8H10O2

The Article related to dialkoxybenzothiophene fluorescent sensor, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Formula: C8H10O2

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On December 31, 2020, Ye, Qiaoqiao; Yokoyama, Tomoya published an article.Electric Literature of 91-16-7 The title of the article was Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin VII: acidolyses of non-phenolic C6-C2-type model compounds using HBr, HCl and H2SO4, and a proposal on the characteristic action of Br- and Cl-. And the article contained the following:

A non-phenolic C6-C2-type lignin model compound with the β-O-4 bond, 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)ethanol (I), was acidolyzed in aqueous 82% 1,4-dioxane containing HBr, HCl, or H2SO4 with a concentration of 0.2 mol/L at 85°C to examine the differences between these acidolyzes. Compound I primarily converted to an enol ether compound, 1-(2-methoxyphenoxy)-2-(3,4-dimethoxyphenyl)ethene (II), via the benzyl cation followed by acidolytic β-O-4 bond cleavage regardless of the acid-type, although the disappearance rates of compound I were remarkably different (HBr > HCl >> H2SO4). Acidolyzes of compound II using these acids under the same conditions showed a similar tendency, but the rate differences were much smaller than in the acidolyzes of compound I. Acidolyzes of the α-methyl-etherified derivative of compound I (I-α-OMe) using these acids under the same conditions suggested that the formation rates of the benzyl cation from compound I-α-OMe (also from compound I) are not largely different between the acidolyzes using these acids, but those of compound II from the benzyl cation are remarkably different. Acidolysis of the α-bromo-substituting derivative of compound I (I-α-Br) using HBr under the same conditions showed a characteristic action of Br in the acidolysis. Br adds to the benzyl cation generated from compound I or I-α-OMe to afford unstable compound I-α-Br, resulting in acceleration of the formation of compound II and of the whole acidolysis reaction. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Electric Literature of 91-16-7

The Article related to lignin acid hydrolysis reaction mechanism bond cleavage, Physical Organic Chemistry: Ring Formation, Cleavage, Enlargement, and Contraction and other aspects.Electric Literature of 91-16-7

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On December 1, 2020, Solomonov, Boris N.; Yagofarov, Mikhail I. published an article.Synthetic Route of 91-16-7 The title of the article was An approach for the calculation of vaporization enthalpies of aromatic and heteroaromatic compounds at 298.15 K applicable to supercooled liquids. And the article contained the following:

An approach for the calculation of the vaporization enthalpies of aromatic and heteroaromatic compounds at T = 298.15 K with accuracy competitive with experiment was proposed. The vaporization enthalpies may be calculated from the solution enthalpies of liquid and solvation enthalpies in benzene. The solution enthalpies of liquids were shown to be constant within a given type of aromatic compounds For a set of 67 liquid and 41 solid aromatic and heteroaromatic compounds not capable of intermol. hydrogen bonding, it was exptl. demonstrated that the solution enthalpies of liquids or supercooled liquids in benzene were equal to 1 ± 1 kJ·mol-1. The way to consider intermol. hydrogen bonding, e.g., in phenol, aniline, pyrrole derivatives, was also proposed. The methods for solvation enthalpy calculation were proposed previously. The calculated and literature vaporization enthalpies values of 415 aromatic and heteroaromatic compounds were compared. Average absolute deviation amounted to 1.3 kJ·mol-1. The proposed approach is especially valuable for calculation of the vaporization enthalpies of low-volatile compounds, including those solid at T = 298.15 K. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Synthetic Route of 91-16-7

The Article related to aromatic heteroaromatic compound supercooled liquid vaporization enthalpy calculation, Phase Equilibriums, Chemical Equilibriums, and Solutions: Nonelectrolytic Solutions and other aspects.Synthetic Route of 91-16-7

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On September 30, 2021, Xu, Wenqi; Wei, Lei; Wang, Zhengxin; Zhu, Ruixue; Jiang, Jiaming; Liu, Huiyan; Du, Juan; Weng, Tsu-Chien; Zhang, Yue-Biao; Huang, Yifan; Liu, Weimin published an article.Category: ethers-buliding-blocks The title of the article was Tracking Ultrafast Fluorescence Switch-On and Color-Tuned Dynamics in Acceptor-Donor-Acceptor Chromophore. And the article contained the following:

Understanding how the conformational change of conjugated mols. with acceptor-donor-acceptor (A-D-A) architecture affects their phys. and optoelectronic properties is critical for determining their ultimate performance in organic electronic devices. Femtosecond-transient absorption, time-resolved upconversion luminescence spectroscopy, and tunable femtosecond-stimulated Raman spectroscopy, aided by quantum chem. calculations, was used systematically study the excited state structural dynamics of the intramol. charge transfer of the tetramethoxy anthracene-based fluorophore 2,3,6,7-tetramethoxy-9,10-dibenzaldehydeanthracene (AnDA) and its derivative 2,3,6,7-tetramethoxy-9,10-diphenylanthracene (TMDPAn) in CHCl3. In the AnDA mol., the tetramethoxy anthracene and benzaldehyde moieties exhibit a strong ability to donate and withdraw electrons. Upon photoexcitation, AnDA shows intriguing ultrafast fluorescence switch-on and red shift dynamics on charge transfer states, and the temporal evolution of AnDA recorded by ultrafast spectroscopy reveals a dynamic picture of 2-step intramol. charge transfer assisted by ultrafast conformational changes and solvation processes. Removing the aldehyde group from TMDPAn significantly decreases the electron pulling capacity of the Ph unit and disables charge transfer characteristics. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Category: ethers-buliding-blocks

The Article related to ultrafast fluorescence switching color tuned dynamics acceptor donor chromophore, Optical, Electron, and Mass Spectroscopy and Other Related Properties: Luminescence and other aspects.Category: ethers-buliding-blocks

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On February 29, 2020, Shakirov, I. I.; Boronoev, M. P.; Sinikova, N. A.; Karakhanov, E. A.; Maksimov, A. L. published an article.Electric Literature of 91-16-7 The title of the article was Selective Hydrogenation of Phenylacetylene on a Pd-Containing Catalyst Based on a Polymer Layered Substrate. And the article contained the following:

A Pd-containing catalyst based on a layered substrate obtained by the polymerization of 2,3,6,7,10,11-hexahydroxytriphenylene and terephthalic aldehyde was developed and studied. The process of liquid-phase hydrogenation of phenylacetylene was studied on the obtained catalyst. It was found that high selectivity for styrene (97%) with complete phenylacetylene conversion is achieved at a hydrogen pressure of 0.1 MPa and a temperature of 40°C. It has been shown that the catalyst exhibits high stability-maintaining conversion and selectivity for 6 cycles. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Electric Literature of 91-16-7

The Article related to hexahydroxytriphenylene terephthalic aldehyde copolymer impregnated palladium catalyst phenylacetylene hydrogenation, Chemistry of Synthetic High Polymers: Monomers and Reagents Used In Polymerization and other aspects.Electric Literature of 91-16-7

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Kazachenko, Aleksandr S.; Miroshnikova, Angelina V.; Tarabanko, Valery E.; Skripnikov, Andrey M.; Malyar, Yuriy N.; Borovkova, Valentina S.; Sychev, Valentin V.; Taran, Oxana P. published an article in 2021, the title of the article was Thermal Conversion of Flax Shives in Sub- and Supercritical Ethanol in the Presence of Ru/C Catalyst.Name: 1,2-Dimethoxybenzene And the article contains the following content:

Thermal conversion of flax shives was studied in sub- and supercritical ethanol medium at 225 and 250°C in the presence of the bifunctional catalyst 3% Ru/C. The use of 3% Ru/C catalyst in the process of thermal conversion of flax shives in supercritical ethanol was found to increase the conversion of the shives by 27% and the yield of liquid products by 10%. The use of 3% Ru/C catalyst in sub- and supercritical ethanol led to the destruction of both lignin and cellulose. The degree of delignification in the non-catalytic thermal conversion increased upon transition from subcritical (225°C) to supercritical (250°C) conditions. Main monomeric products of the thermal conversion process were guaiacylpropene or guaiacylpropane depending on the process temperature In the presence of Ru/C catalyst, the mol. weight distribution was shifted towards an increase in the content of monomeric compounds in the liquid products. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Name: 1,2-Dimethoxybenzene

The Article related to flax shive thermal conversion ruthenium carbon catalyst, Cellulose, Lignin, Paper, and Other Wood Products: Wood and Other Cellulosic Materials and other aspects.Name: 1,2-Dimethoxybenzene

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