Tag: 200-300

Organic ligand and solvent free oxidative carbonylation of amine over Pd/TiO₂ with unprecedented activity was written by Liu, Shujuan;Dai, Xingchao;Wang, Hongli;Shi, Feng. And the article was included in Green Chemistry in 2019.Recommanded Product: 2387-23-7 This article mentions the following:

A highly active Pd/TiO₂ catalyst system was prepared and applied in the oxidative carbonylation of amines to ureas with ultra-low Pd content under organic ligand and solvent free conditions. The catalytic turnover frequencies (TOFs, moles of amines converted per mol of Pd per h) were 126 000 and 250 000 h^-1 for the production of diphenylurea and dibenzylurea, resp. An expanded substrate scope including the electron-rich and electron-deficient anilines, primary aliphatic amines, secondary amines was also established. This work offers a straightforward, step economic, and green methodol. for the efficient synthesis of valuable ureas. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7Recommanded Product: 2387-23-7).

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds. Tertiary amides, with the important exception of N,N-dimethylformamide, exhibit low solubility in water. In simple aromatic amides, fragmentation occurs on both sides of the carbonyl group. If a hydrogen is available in N-substituted aromatic amides, it tends to migrate and form an aromatic amine and the loss of a ketene.Recommanded Product: 2387-23-7

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Activated low temperature bleaching of cotton fabric with glucose oxidase was written by Zhao, Zheng;Chen, Ting-Chun;Zhu, Quan;Zhu, Li-Min. And the article was included in Yinran in 2011.Related Products of 10543-57-4 This article mentions the following:

In low-temperature bleaching of cotton fabric with glucose oxidase, the decomposition of H₂O₂ is only about 50%, so activator TAED is introduced into the bleaching system. The optimal process of activated low-temperature bleaching is: pH value 7.0, n(TAED):n(H₂O₂) 0.5:1, bleaching at 70 °C for 60 min, bath ratio 10:1, and sodium pyrophosphate 2g/L. Decomposition rate of H₂O₂ is above 98% in the activated low temperature bleaching system. The whiteness of the fabric bleached in the activated low temperature process is lower than that in the traditional process. Compared with traditional bleaching process, low temperature bleaching with glucose oxidase has lower damage and less strength loss to fibers. In the experiment, the researchers used many compounds, for example, N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4Related Products of 10543-57-4).

N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4) belongs to amides. In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Thus amides can participate in hydrogen bonding with water and other protic solvents; the oxygen atom can accept hydrogen bonds from water and the N–H hydrogen atoms can donate H-bonds. Amides can be freed from solvent or water by drying below their melting points. These purifications can also be used for sulfonamides and acid hydrazides.Related Products of 10543-57-4

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Dehydration of an Insoluble Urea Byproduct Enables the Condensation of DCC and Malonic Acid in Flow was written by O’Brien, Alexander G.;Ricci, Eric M.;Journet, Michel. And the article was included in Organic Process Research & Development in 2018.COA of Formula: C13H24N2O This article mentions the following:

A procedure for the preparation of N,N’-dicyclohexylbarbituric acid from DCC and malonic acid is described. Addition of phosphorus oxychloride to the reaction mixture facilitates dehydration of the insoluble byproduct N,N’-dicyclohexyl urea, enabling operation in continuous flow. A development approach based on in situ monitoring of batch reactions was used, which supported screening and determination of reaction conditions at small scale prior to scaleup in flow. Addnl. mechanistic understanding and control of impurity formation are presented. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7COA of Formula: C13H24N2O).

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.COA of Formula: C13H24N2O

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Homogeneously catalytic ozone decolorization of reactive dyeing effluents was written by Luo, Deng-hong;Zheng, Qing-kang;Su, Shi;Chen, Song;Pu, Zong-Yao;Gao, Dian-quan. And the article was included in Yinran in 2010.COA of Formula: C10H16N2O4 This article mentions the following:

Synergistic action of homogeneous activator tetraacetylethylenediamine (TAED) on ozone decolorization of reactive dyes was studied. Influences of ozone airflow, TAED concentration, pH value and reaction time on decoloration rate and COD_Cr value were investigated. The results showed that activator TAED could enhance ozone decolorization action, improve decoloration rate and removal of COD_Cr shorten reaction time by activating ozone to produce peracetic acid and reduce surface tension of the solution In the experiment, the researchers used many compounds, for example, N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4COA of Formula: C10H16N2O4).

N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4) belongs to amides. In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Thus amides can participate in hydrogen bonding with water and other protic solvents; the oxygen atom can accept hydrogen bonds from water and the N–H hydrogen atoms can donate H-bonds. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.COA of Formula: C10H16N2O4

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Acetyl nitrate mediated conversion of methyl ketones to diverse carboxylic acid derivatives was written by Capilato, Joseph N.;Pellegrinelli, Peter J.;Bernard, Josephine;Schnorbus, Logan;Philippi, Shane;Mattiucci, Joseph;Hoy, Erik P.;Perez, Lark J.. And the article was included in Organic & Biomolecular Chemistry in 2021.COA of Formula: C9H10BrNO2 This article mentions the following:

The development of a novel acetyl nitrate mediated oxidative conversion of Me ketones to carboxylic acid derivatives is described. By analogy to the haloform reaction and supported by exptl. and computational investigation authors propose a mechanism for this transformation. In the experiment, the researchers used many compounds, for example, 4-Bromo-N-methoxy-N-methylbenzamide (cas: 192436-83-2COA of Formula: C9H10BrNO2).

4-Bromo-N-methoxy-N-methylbenzamide (cas: 192436-83-2) belongs to amides. Amides can be viewed as a derivative of a carboxylic acid RC(=O)OH with the hydroxyl group –OH replaced by an amine group −NR′R″; or, equivalently, an acyl (alkanoyl) group RC(=O)− joined to an amine group. Amides can be recrystallised from large quantities of water, ethanol, ethanol/ether, aqueous ethanol, chloroform/toluene, chloroform or acetic acid. The likely impurities are the parent acids or the alkyl esters from which they have been made. The former can be removed by thorough washing with aqueous ammonia followed by recrystallisation, whereas elimination of the latter is by trituration or recrystallisation from an organic solvent.COA of Formula: C9H10BrNO2

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Synthesis of reprocessable lignin-based non-isocyanate poly(imine-hydroxyurethane)s networks was written by Xue, Danwei;Xue, Bailiang;Tang, Rui;Shen, Chao;Li, Xinping;Zhao, Wei. And the article was included in Paper and Biomaterials in 2021.HPLC of Formula: 2387-23-7 This article mentions the following:

In this study, an environmentally friendly and non-toxic route to synthesize lignin-based non-isocyanate poly(imine-hydroxyurethane)s networks was explored. Specifically, the NH₂-terminated polyhydroxyurethanes (NPHUs) prepolymer was first synthesized from bis(6-membered cyclic carbonate) (BCC) and diamine via the ring-opening reaction. Subsequently, the corresponding lignin based non-isocyanate polyurethanes (NIPUs) with tunable properties were synthesized from NPHUs and levulinate lignin derivatives containing ketone groups via the Schiff base reaction. The structural, mech., and thermal properties of NIPUs with different stoichiometric feed ratios of BCC and levulinate lignin were characterized by Fourier transform IR spectroscopy, NMR, differential scanning calorimetry, dynamic mech. anal., and thermogravimetric anal.. The results indicated that the tensile strength, Young’s modulus, toughness, storage modulus, glass transition temperature, and thermal stability of lignin-based NIPUs gradually increased with increasing lignin content, and the highest Young’s modulus of 41.1 MPa was obtained when lignin content reached 45.53%. With good reprocessing properties, this synthetic framework of lignin-based NIPUs also provides sustainable non-isocyanate-based substitutions to traditional polyurethane networks. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7HPLC of Formula: 2387-23-7).

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. The solubilities of amides and esters are roughly comparable. Typically amides are less soluble than comparable amines and carboxylic acids since these compounds can both donate and accept hydrogen bonds. Tertiary amides, with the important exception of N,N-dimethylformamide, exhibit low solubility in water. As a result of interactions such as these, the water solubility of amides is greater than that of corresponding hydrocarbons. These hydrogen bonds are also have an important role in the secondary structure of proteins.HPLC of Formula: 2387-23-7

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

The Behavior of Silver Nanotextiles during Washing was written by Geranio, L.;Heuberger, M.;Nowack, B.. And the article was included in Environmental Science & Technology in 2009.COA of Formula: C10H16N2O4 This article mentions the following:

The widespread use of silver nanoparticles (Ag-NPs) in com. products, especially textiles, will likely result in an unknown spread of Ag into the environment. The quantification and characterization of the Ag released from nano-Ag-products is an important parameter needed to predict the effect of Ag-NPs on the environment. The aim of this study was to determine the amount and the form of Ag released during washing from nine fabrics with different ways of silver incorporation into or onto the fibers. The effect of pH, surfactants, and oxidizing agents was evaluated. The results show that little dissolution of Ag-NPs occurs under conditions relevant to washing (pH 10) with dissolved concentrations 10 times lower than at pH 7. However, bleaching agents such as hydrogen peroxide or peracetic acid (formed by the perborate/TAED system) can greatly accelerate the dissolution of Ag. The amount and form of Ag released from the fabrics as ionic and particulate Ag depended on the type of Ag-incorporation into the textile. The percentage of the total silver emitted during one washing of the textiles varied considerably among products (from less than 1 to 45%). In the washing machine the majority of the Ag (at least 50% but mostly >75%) was released in the size fraction >450 nm, indicating the dominant role of mech. stress. A conventional silver textile did not show any significant difference in the size distribution of the released silver compared to many of the textiles containing nano-Ag. These results have important implications for the risk assessment of Ag-textiles and also for environmental fate studies of nano-Ag, because they show that under conditions relevant to washing, primarily coarse Ag-containing particles are released. In the experiment, the researchers used many compounds, for example, N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4COA of Formula: C10H16N2O4).

N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.COA of Formula: C10H16N2O4

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Effect of Reactive Distillation on the Yield of Tetraacetylethylenediamine (TAED) was written by Kim, Eun-Seon;Park, Kyun Young;Heo, Jung-Moo;Kim, Byung Jo;Ahn, Kyo Duck;Lee, Jong-Gi. And the article was included in Industrial & Engineering Chemistry Research in 2010.Product Details of 10543-57-4 This article mentions the following:

Tetraacetylethylenediamine (TAED) was prepared by acetylation of diacetylethylenediamine (DAED) with acetic anhydride in a 5 L reactor coupled with a packed distillation column, 2.5 cm in inside diameter and 1 m in length. The reaction temperature was set at 135 °C and the reflux ratio at 6. The molar ratio of acetic anhydride to DAED was varied from 3 to 5. A TAED yield as high as 80% was obtained, higher by 15% than in the absence of distillation The temporal variation of the TAED yield was calculated using the kinetic parameters in the literature. Calculated and exptl. values showed good agreement. In the experiment, the researchers used many compounds, for example, N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4Product Details of 10543-57-4).

N,N-(Ethane-1,2-diyl)bis(N-acetylacetamide) (cas: 10543-57-4) belongs to amides. The amide group is called a peptide bond when it is part of the main chain of a protein, and an isopeptide bond when it occurs in a side chain, such as in the amino acids asparagine and glutamine. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Product Details of 10543-57-4

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Triphenylamine and Triphenylaminecarboxylic Acid was written by Goldberg, Irma;Nimerovsky, Marie. And the article was included in Berichte der Deutschen Chemischen Gesellschaft in 1907.Name: N-(4-Hydroxyphenyl)-4-methylbenzenesulfonamide This article mentions the following:

Triphenylamine-o-carboxylic acid, Ph₂NC₆H₄CO₂H, from phenylanthranilic acid, iodobenzene, potassium carbonate and a little copper, in nitrobenzene solution, at 200-215°. The yield is increased to 94% of the theory and the product is purer by the use of 3-4 mol. of iodobenzene. Sulphur-colored, icathery crystals, m. 208° (corr.). Concentrated sulphuric acid dissolves it with a blue color, changing to deep green with a little nitric acid; on heating the colors are yellow and blood red, respectively. N-Phenylacridone,C₆H₄ C₆H₄, by the action of concentrated sulphuric acid on the preceding compound, at 100°. Large, lustrous, sulphur-colored crystals, m. 276° (corr.). The yield is 86% of the theoretical. The glacial acetic acid solution has an intense blue fluorescence, which becomes green in concentrated sulphuric acid, the color of the solution being yellow. Nitric acid destroys the fluorescence, which is not exhibited by the acridone in amyl alcohol solution. On heating the above carboxylic acid over 200°, for a short time, it is converted, practically quantitatively, into triphenylamine, m. 125°, which is also prepared without difficulty, from diphenylamine, iodobenzene, potassium carbonate and a little copper, in presence of nitrobenzene. Concentrated sulphuric acid gives a green solution with a blue fluorescence; the addition of a little nitric acid increases the intensity of the green color; water precipitates colorless flocks. N-p-Tolylphenylanthranilic acid. MeC₆H₄NPhC₆H₄CO₂H, from p-iodotoluene, in amyl alcoholic solution, at 160-170°. Pale yellow, crystalline powder, m. 175° (corr.), yield 82% of the theory. Concentrated sulphuric acid gives a dark blue solution, changing to green on the addition of nitric acid. In the experiment, the researchers used many compounds, for example, N-(4-Hydroxyphenyl)-4-methylbenzenesulfonamide (cas: 1146-43-6Name: N-(4-Hydroxyphenyl)-4-methylbenzenesulfonamide).

N-(4-Hydroxyphenyl)-4-methylbenzenesulfonamide (cas: 1146-43-6) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. Amides are not in general accessible by the direct condensation of amines with carboxylic acids for two reasons: first, both components are readily deactivated by a transfer of a proton from the acid to the amine and second, the hydroxy unit on the carbonyl of the acid is a relatively poor leaving group. Nevertheless, the formation of five- and six-membered rings is often surprisingly simple provided that other factors can be brought into play to assist in the condensation.Name: N-(4-Hydroxyphenyl)-4-methylbenzenesulfonamide

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Novel Metal-Organic Framework (MOF) Based Composite Material for the Sequestration of U(VI) and Th(IV) Metal Ions from Aqueous Environment was written by Alqadami, Ayoub Abdullah;Naushad, Mu.;Alothman, Zeid Abdullah;Ghfar, Ayman A.. And the article was included in ACS Applied Materials & Interfaces in 2017.Computed Properties of C13H24N2O This article mentions the following:

The combination of magnetic nanoparticles and metal-organic frameworks (MOFs) has demonstrated their prospective for pollutant sequestration. In this work, a magnetic metal-organic framework nanocomposite (Fe₃O₄@AMCA-MIL53(Al)) was prepared and used for the removal of U(VI) and Th(IV) metal ions from aqueous environment. Fe₃O₄@AMCA-MIL53(Al) nanocomposite was characterized by TGA, FTIR, SEM-EDX, XRD, HRTEM, BET, VSM (vibrating sample magnetometry), and XPS analyses. A batch technique was applied for the removal of the aforesaid metal ions using Fe₃O₄@AMCA-MIL53(Al) at different operating parameters. The isotherm and kinetic data were accurately described by the Langmuir and pseudo-second-order models. The adsorption capacity was calculated to be 227.3 and 285.7 mg/g for U(VI) and Th(IV), resp., by fitting the equilibrium data to the Langmuir model. The kinetic studies demonstrated that the equilibrium time was 90 min for each metal ion. Various thermodn. parameters were evaluated which indicated the endothermic and spontaneous nature of adsorption. The collected outcomes showed that Fe₃O₄@AMCA-MIL53(Al) was a good material for the exclusion of these metal ions from aqueous medium. The adsorbed metals were easily recovered by desorption in 0.01 M HCl. The excellent adsorption capacity and the response to the magnetic field made this novel material an auspicious candidate for environmental remediation technologies. In the experiment, the researchers used many compounds, for example, 1,3-Dicyclohexylurea (cas: 2387-23-7Computed Properties of C13H24N2O).

1,3-Dicyclohexylurea (cas: 2387-23-7) belongs to amides. Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents. As a result of interactions such as these, the water solubility of amides is greater than that of corresponding hydrocarbons. These hydrogen bonds are also have an important role in the secondary structure of proteins.Computed Properties of C13H24N2O

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics