Month: November 2022

On November 13, 2014, Rayer, Aravind V.; Sumon, Kazi Z.; Jaffari, Laila; Henni, Amr published an article.Product Details of 2160-93-2 The title of the article was Dissociation Constants (pKa) of Tertiary and Cyclic Amines: Structural and Temperature Dependences. And the article contained the following:

The dissociation constants of the conjugate acids of 14 amines (diethylethanolamine, monoethanolamine, n-butyldiethanolamine, t-butyldiethanolamine, n,n-dimethylpropanolamine, methyl-diethanolamine, ethyldiethanolamine, monoethylethanolamine, n,n-dimethylisopropanolamine, triethanolamine, 4-methylpiperazine-1-amine, 3-morpholino propylamine, 4,2-hydroxylethylmorpholine, and triethylamine) were measured over a temperature range between 293.15 and 333.15 K using the potentiometric titration method. The change in standard state thermodn. properties was derived from the van’t Hoff equation. The influence of the steric hindrance, number of -OH groups, and length of alkyl chain on the dissociation constants was identified. Of the studied amines, few sterically hindered derivatives of piperazine, a secondary amine monoethylethanolamine, and a tertiary amine n,n-dimethylpropanolamine have high pKa values but lower standard enthalpy than those of the benchmark amine, monoethanolamine (MEA), and thus were deemed promising for CO2 capture technol. Monoethylethanolamine (MEEA) was found to have the highest basicity (pKa) with the lowest standard state enthalpy (ΔH°/kJ·mol-1). The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Product Details of 2160-93-2

The Article related to dissociation constant tertiary cyclic amine structural temperature dependence, Phase Equilibriums, Chemical Equilibriums, and Solutions: Acid-Base Equilibriums, Complex Formation and other aspects.Product Details of 2160-93-2

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Li, Xinsheng; Pang, Jifeng; Zhang, Jingcai; Li, Xianquan; Jiang, Yu; Su, Yang; Li, Weizhen; Zheng, Mingyuan published an article in 2021, the title of the article was Tuning the reaction selectivity over MgAl spinel-supported Pt catalyst in furfuryl alcohol conversion to pentanediols.Formula: C5H12O2 And the article contains the following content:

Catalytic conversion of biomass-derived feedstock to high-value chems. is of remarkable significance for alleviating dependence on fossil energy resources. MgAl spinel-supported Pt catalysts were prepared and used in furfuryl alc. conversion. The approaches to tune the reaction selectivity toward pentanediols (PeDs) were investigated and the catalytic performance was correlated to the catalysts’ physicochem. properties based on comprehensive characterizations. It was found that 1-8 weight% Pt was highly dispersed on the MgAl2O4 support as nanoparticles with small sizes of 1-3 nm. The reaction selectivity did not show dependence on the size of Pt nanoparticles. Introducing LiOH onto the support effectively steered the reaction products toward the PeDs at the expense of tetrahydrofurfuryl alc. (THFA) selectivity. Meanwhile, the major product in PeDs was shifted from 1,5-PeD to 1,2-PeD. The reasons for the PeDs selectivity enhancement were attributed to the generation of a large number of medium-strong base sites on the Li-modified Pt catalyst. The reaction temperature is another effective factor to tune the reaction selectivity. At 230°C, PeDs selectivity was enhanced to 77.4% with a 1,2-PeD to 1,5-PeD ratio of 3.7 over 4Pt/10Li/MgAl2O4. The Pt/Li/MgAl2O4 catalyst was robust to be reused five times without deactivation. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Formula: C5H12O2

The Article related to pentanediol furfuryl alc magnesium aluminate platinum catalyst tuning reaction, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Formula: C5H12O2

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On January 31, 2021, Fu, Xiaomin; Ren, Xiaoqian; Shen, Jiecan; Jiang, Yong; Wang, Yuehua; Orooji, Yasin; Xu, Wenlong; Liang, Jinhua published an article.Electric Literature of 111-29-5 The title of the article was Synergistic catalytic hydrogenation of furfural to 1,2-pentanediol and 1,5-pentanediol with LDO derived from CuMgAl hydrotalcite. And the article contained the following:

A series of layer double metal oxides (LDO) from CuMgAl hydrotalcite precursors were prepared by urea decomposition under different calcination temperatures in this work. Various characterizations including x-ray diffraction, SEM, FTIR, XPS, H2-TPR, NH3-TPD and CO2-TPD were carried out to investigate the structural properties of the as-prepared samples. After calcination at certain temperatures, the resulted LDO presents the excellent catalytic property in the selective hydrogenolysis of furfural (FA) to 1,2-pentanediol (1,2-PeD) and 1,5-pentanediol (1,5-PeD). The Cu+/Cu2+ ratio and the acid-base amount from the calcination process play the key role in the catalytic performance towards this reaction. The optimal catalyst (CuMgAlO-S3) with the maximal Cu+/Cu2+ ratio and the acid-base amount exhibits the best catalytic performance towards hydrogenation of furfural to 1,2-pentanediol (selectivity 55.2%.) and 1,5-pentanediol (selectivity 28.5%) with more than 80% of conversion rate, which indicated the selectivity of 1,2- and 1,5-PeDs counted on the synergistic effect of Cu+ and acid-base properties. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Electric Literature of 111-29-5

The Article related to hydrotalcite layered double oxide catalyst furfural hydrogenolysis pentanediol, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Electric Literature of 111-29-5

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On February 18, 2022, Schmidt, Michael A. published an article.Reference of Isochroman-3-ol The title of the article was Effect of Terminal Alkylation of Aryl and Heteroaryl Hydrazines in the Fischer Indole Synthesis. And the article contained the following:

The effect of alkylation on the terminal position of aryl and heteroaryl hydrazines in the Fischer indole synthesis was examined Compared to their unalkylated counterparts, reactions using alkylated s provided indole products with higher yields and faster rates. The reactions can be conducted at lower temperatures and are compatible with acid-sensitive functionality. The terminally alkylated hydrazines were readily prepared by a new two-step sequence and held as stable hydrazinium salts. The mild formation of the salts along with the favorable Fischer indole reaction conditions highlights the potential of this approach in later-stage synthetic use. The experimental process involved the reaction of Isochroman-3-ol(cas: 42900-89-0).Reference of Isochroman-3-ol

The Article related to fischer indole synthesis, hydrazine ketone alkylation amidation cross coupling, Heterocyclic Compounds (One Hetero Atom): Indoles, Indolizines, Carbazoles, and Other Arenopyrroles and other aspects.Reference of Isochroman-3-ol

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On September 30, 2022, Xu, Shuguang; Tian, Qing; Xiao, Yuan; Zhang, Wenyu; Liao, Shengqi; Li, Jianmei; Hu, Changwei published an article.Computed Properties of 473-81-4 The title of the article was Regulating the competitive reaction pathway in glycerol conversion to lactic acid/glycolic acid selectively. And the article contained the following:

The numerous parallel reactions in glycerol conversion substantially challenge the effective synthesis of target chem. from oversupplied glycerol. Herein, we intensively studied the control of the complex reaction network in glycerol conversion, and realized the selective production of lactic acid or glycolic acid by integrating the use of different bases with Cu/γ-Al2O3 catalyst. The results indicated that base promoted the oxidation dehydrogenation of glycerol over Cu/γ-Al2O3 catalyst to glyceraldehyde intermediate. Remarkably, base significantly contributed to the control of the competitive reactions in the next glyceraldehyde transformation. DFT calculation revealed that strong base (NaOH) independently promoted the removal of H in C2 of glyceraldehyde, thereby facilitating the dehydration reaction and leading to the selective production of lactic acid. Combing with First-principles calculation, it was revealed that both NaHCO3 and CuO species contributed to increase the electrophilicity of C2 and C3 in glyceraldehyde, thereby directing the conversion of the resultant glyceraldehyde intermediate towards the cleavage of C2-C3 to glycolal. Cu/γ-Al2O3 then sep. catalyzed the oxidation of glycolal selectively to glycolic acid. This work might provide a promising approach and give some clues for the valorization of glycerol in widespread applications, thus affording profitable possibilities for the sustainable biodiesel. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Computed Properties of 473-81-4

The Article related to glycerol oxidation dehydrogenation lactic glycolic acid copper alumina catalyst, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Computed Properties of 473-81-4

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On February 28, 2022, Polidoro, Daniele; Perosa, Alvise; Barbaro, Elena; Feltracco, Matteo; Argiriadis, Elena; Selva, Maurizio published an article.Name: SweetPearlR P300 DC Maltitol The title of the article was Multiphase Hydrogenation of D-Glucosamine Hydrochloride, N-Acetyl-D-Glucosamine, D-Glucose, and D-Maltose over Ru/C with Integrated Catalyst Recovery. And the article contained the following:

A multiphase (MP) system composed of two immiscible liquids, water and isooctane, and com. 5% Ru/C as a catalyst, both with and without an addnl. organic liquid (OL: THF, 2-methyl-THF, Me iso-Bu carbinol, and cyclopentyl Me ether) was designed and investigated for the chemoselective catalytic hydrogenation of four model examples of biobased sugars and amino/amido-sugars. At 110°C and 40 bar of H2, D-glucosamine hydrochloride and N-acetyl-D-glucosamine were converted selectively into their corresponding hydrogenated derivatives, 2-amino-D-sorbitol and 2-acetamide-D-sorbitol, resp., isolated in >99% yields. Both the reagents and the products were converted and formed in the aqueous phase, resp., while, by tuning the relative proportions of water, isooctane, and the third added liquid (particularly THF), the catalyst (Ru/C) was perfectly segregated in the organic layer, where it could be recycled and reused up to nine times without any loss of activity and selectivity, in a semicontinuous mode. Under such conditions, the reaction was implemented on a gram scale with a productivity up to 0.89 mmol 2-amino-D-sorbitol/(gcat h). The same hydrogenation efficiency and reagent/product/catalyst separation were achieved during the MP reactions of D-glucose and D-maltose. In this case, however, results were independent of the MP composition: at 120°C and 20-40 bar of H2, using either H2O/isooctane or H2O/isooctane/OL systems, a quant. conversion of D-glucose and D-maltose was reached with a selectivity up to 78 and >99% toward sorbitol and maltitol, resp. Ru/C was perfectly separated out of the aqueous phase in both MP mixtures, with a negligible metal leaching, below 0.01 weight %. The multiphase approach for all the tested substrates proved not only to be an original and robust protocol to improve the product isolation and catalyst recycling, but also effective in preventing metal contamination in the synthesis of final derivatives The experimental process involved the reaction of SweetPearlR P300 DC Maltitol(cas: 585-88-6).Name: SweetPearlR P300 DC Maltitol

The Article related to hydrogenation glucosamine acetylglucosamine glucose maltose ruthenium carbon catalyst, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Name: SweetPearlR P300 DC Maltitol

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On July 21, 2021, Shao, Yuewen; Guo, Mingzhu; Wang, Junzhe; Sun, Kai; Zhang, Lijun; Zhang, Shu; Hu, Guangzhi; Xu, Leilei; Yuan, Xiangzhou; Hu, Xun published an article.Safety of Pentane-1,5-diol The title of the article was Selective Conversion of Furfural into Diols over Co-Based Catalysts: Importance of the Coordination of Hydrogenation Sites and Basic Sites. And the article contained the following:

1,5-Pentanediol (1,5-PDO) is a feedstock for synthesis of polyesters and polyurethanes, and its selective production from furfural is a desirable route but very challenging. In this study, the production of 1,5-PDO from furfural was investigated over the Co-Mg-Al catalyst, containing abundant hydrogenation sites and basic sites. Using layered double hydroxides as the catalyst precursor benefited dispersion of metallic Co particles via preventing migration of cobalt species and developing pore structures. Furthermore, the Co-Mg-Al catalyst possessed abundant basic sites, rendering its superior catalytic activity to Co-Al or Co-Mg catalysts. In situ diffuse reflectance IR spectroscopy (DRIFTS) characterization for FA conversion demonstrated that the cooperation of abundant hydrogenation sites and basic sites facilitated a strong adsorption of C-O-C and carbon-carbon double-bond groups, which benefited the conversion of FA into diols. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Safety of Pentane-1,5-diol

The Article related to selective hydrogenation furfural diol cobalt magnesium aluminum hydrogenation catalyst, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Safety of Pentane-1,5-diol

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Matsagar, Babasaheb M.; Hsu, Chang-Yen; Chen, Season S.; Ahamad, Tansir; Alshehri, Saad M.; Tsang, Daniel C. W.; Wu, Kevin C.-W. published an article in 2020, the title of the article was Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol over a Rh-loaded carbon catalyst in aqueous solution under mild conditions.Synthetic Route of 111-29-5 And the article contains the following content:

We describe the selective hydrogenation of furfural (FAL) into tetrahydrofurfuryl alc. (THFA) under mild conditions (30°C) in aqueous media using an Rh-loaded carbon (Rh/C) catalyst in a one-pot fashion. In FAL hydrogenation, the Rh/C catalyst showed a high THFA yield (92%) with 93% selectivity in aqueous media within 12 h, whereas the use of a dimethylacetamide (DMA) solvent system resulted in a 95% THFA yield within 32 h at 30°C. The study of the effect of the solvent on FAL hydrogenation reveals that polar solvents showed higher THFA yields than a toluene solvent. The Rh/C catalyst used in this study exhibited higher activity compared to Ru/C, Pd/C, Ni/C derived from Ni-based metal-organic framework (Ni-MOF), and Ni-loaded carbon black (Ni/CB) catalysts in FAL-to-THFA hydrogenation. The Rh/C catalyst is characterized in detail using various characterization techniques such as TEM, XRD, N2-adsorption-desorption, XPS, and ICP-OES to understand its physicochem. properties. The Rh/C catalyst shows similar high THFA yields in the recycling experiment of FAL hydrogenation under ambient conditions. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Synthetic Route of 111-29-5

The Article related to rhodium carbon catalyst furfural hydrogenation tetrahydrofurfuryl alc aqueous solution, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.Synthetic Route of 111-29-5

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Kaithal, Akash; Hoelscher, Markus; Leitner, Walter published an article in 2018, the title of the article was Catalytic Hydrogenation of Cyclic Carbonates using Manganese Complexes.SDS of cas: 78-26-2 And the article contains the following content:

Catalytic hydrogenation of cyclic carbonates to diols and methanol was achieved using a mol. catalyst based on earth-abundant manganese. The complex [Mn(CO)2(Br)][HN(C2H4PiPr2)2] 1 comprising com. available MACHO ligand is an effective pre-catalyst operating under relatively mild conditions (T=120 °C, p(H2)=30-60 bar). Upon activation with NaOtBu, the formation of coordinatively unsaturated complex [Mn(CO)2][N((C2H4PiPr2)2)] 5 was spectroscopically verified, which confirmed a kinetically competent intermediate. With the pre-activated complex, turnover numbers up to 620 and 400 were achieved for the formation of the diol and methanol, resp. Stoichiometric reactions under catalytically relevant conditions provide insight into the stepwise reduction form the CO2 level in carbonates to methanol as final product. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).SDS of cas: 78-26-2

The Article related to manganese complex cyclic carbonate hydrogenation diol methanol synthesis, carbon dioxide, carbonates, hydrogenation, manganese, methanol, Industrial Organic Chemicals, Leather, Fats, and Waxes: Manufacture Of Industrial Organic Chemicals and other aspects.SDS of cas: 78-26-2

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On August 8, 2019, Bhujade, Paras Raybhan; Pawar, Rajesh; Naik, Maruti N.; Potlapally, Rajender Kumar; Tembhare, Nitin Ramesh; Autkar, Santosh Shridhar; Garg, Ruchi; Venkatesha, Hagalavadi M.; Klausener, Alexander G. M.; Ramakrishna, Visannagari; Adhav, Nilesh Bharat; Trivedi, Pooja published a patent.Category: alcohols-buliding-blocks The title of the patent was Novel oxadiazoles as pesticides and their preparation. And the patent contained the following:

The invention relates to oxadiazoles of formula I, as pesticides. Compounds of formula I wherein R1 is C1-2 haloalkyl; L1 is a bond, CO, O, S, SO, etc.; L2 is (CR7R8)0-4N:S(:O)R9, (CR7R8)0-4CON:S(:O)R9, CONR4SO2, etc.; A is (un)substituted (non)aromatic heterocyclyl; R4 is H, CN, OH, amino, etc.; R7 and R8 are independently H, halo, CN, C1-4 alkyl, etc.; R9 is H, amino, C1-6 alkyl, etc.; R10 is H, halo, OH, CN, NO2, etc.; and N-oxides, metal complexes, isomers, polymorphs and agriculturally acceptable salts thereof, are claimed. Example compound II was prepared by a multistep procedure (procedure given). The invention compounds were evaluated for their pesticidal activity (some data given). The experimental process involved the reaction of (2-Fluorophenyl)methanethiol(cas: 72364-46-6).Category: alcohols-buliding-blocks

The Article related to oxadiazole preparation pesticide, Heterocyclic Compounds (More Than One Hetero Atom): Other 5-Membered Rings, Two Or More Hetero Atoms and other aspects.Category: alcohols-buliding-blocks

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