Tag: 200-300

Well-defined Cp*Co(III)-catalyzed Hydrogenation of Carbonates and Polycarbonates was written by Dahiya, Pardeep;Gangwar, Manoj Kumar;Sundararaju, Basker. And the article was included in ChemCatChem in 2021.Computed Properties of C13H10O3 The following contents are mentioned in the article:

The authors herein report the catalytic hydrogenation of carbonates and polycarbonates into their corresponding diols/alcs. using well-defined, air-stable, high-valent cobalt complexes. Several novel Cp*Co(III) complexes bearing N,O-chelation were isolated for the first time and structurally characterized by various spectroscopic techniques including single crystal X-ray crystallog. These novel Co(III) complexes have shown excellent catalytic activity to produce value added diols/alcs. from carbonate and polycarbonates through hydrogenation using mol. hydrogen as sole reductant or i-PrOH as transfer hydrogenation source. To demonstrate the developed methodol.’s practical applicability, the authors have recycled the bisphenol A monomer from compact disk (CD) through hydrogenation under the established reaction conditions using phosphine-free, earth-abundant, air- and moisture-stable high-valent cobalt catalysts. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Computed Properties of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Computed Properties of C13H10O3

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

Highly Enantioselective Addition of Dialkylzinc to Trifluoroacetophenones, Catalyzed by 1,2-Diamines. Synthesis of Key Fragments of Inhibitors of the Enzyme 11β-HSD1 and Kinetic Analysis of the Process was written by Genov, Miroslav;Martinez-Ilarduya, Jesus M.;Calvillo-Barahona, Mercedes;Espinet, Pablo. And the article was included in Organometallics in 2010.Recommanded Product: Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate The following contents are mentioned in the article:

Chiral diamines derived from (R,R)- or (S,S)-1,2-diphenylethylenediamine and (S)- or (R)-2,2′-bis(bromomethyl)-1,1′-binaphthalene perform very well as catalysts in the enantioselective addition of ZnEt₂ and ZnMe₂ to trifluoroacetophenones, avoiding reduction products, in contrast to the poor results with amino alcs. Excellent yields (up to 99%) and high enantioselectivity (up to 92%) are achieved with the best ligands. A kinetic study at low temperature (-37°) shows that the reduction reaction rate on ligandless ZnEt₂ is negligible (2 orders of magnitude slower) compared to the rate of addition reaction on [ZnR₂(N-N)]. Using this new procedure, reported fragments of inhibitors of enzyme 11β-HSD1 that are active against obesity and type 2 diabetes mellitus, as well as new unreported modified fragments of these bioactive mols., were produced efficiently and enantioselectively. This study involved multiple reactions and reactants, such as Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate (cas: 898787-14-9Recommanded Product: Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate).

Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate (cas: 898787-14-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate

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

Lipase-catalyzed ring-opening copolymerization of macrocycles for diselenide-functionalized long-chain polycarbonate: Synthesis, kinetic process and ROS responsiveness was written by Li, Siqi;Ma, Xiaotong;Li, Ruizhi;Sun, Chuanhao;Hu, Jieni;Zhang, Yan. And the article was included in Reactive & Functional Polymers in 2022.Reference of 102-09-0 The following contents are mentioned in the article:

Herein, the lipase-catalyzed ring-opening copolymerization of the diethylene diselenide carbonate dimer (SeC) with its analog macrocycle (1,3,12,14-Tetraoxacyclodocosane-2,13-dione, TDC) was explored, and the small-ring carbonate (TMC) was used as control. The structure and composition of the diselenide-functionalized long-chain polycarbonates were confirmed by NMR and FTIR. The ¹³C NMR and ⁷⁷Se NMR showed that the copolymers observed random sequence. Moreover, the kinetic process of TDC + SeC copolymerization demonstrated a faster polymerization rate and higher conversion of SeC in comparison with TMC + SeC. Besides, the copolymers exhibited ROS-responsive behaviors when exposed to the oxidizing environment owing to the diselenide groups, which was confirmed by UV-vis, DLS and TEM. Therefore, the ROS responsiveness facilitated potential application for the diselenide-functionalized copolymers. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Reference of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Reference of 102-09-0

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

Detection of vapors from overheated PVC cables with modified sea urchin-like ZnO for fire warning was written by Li, Zhou;Han, Jia;Chen, Wenjia;Yi, Jianxin. And the article was included in Sensors and Actuators, B: Chemical in 2022.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

Detecting the emitted vapors from overheated polyvinyl chloride (PVC) cables has proven to be an effective way to monitor early elec. fires. In this work, the vapors generated from both conventional and phthalate-free PVC cables were first examined 2-ethylhexanol (2-EH) was found to be ubiquitously present and can serve as a universal signature gas for the overheated cables. Sea urchin-like ZnO was then prepared via a template-free hydrothermal route for sensing 2-EH. A facile immersion-calcination method was adopted to further modify ZnO, and different CuO/ZnO and Cr₂O₃/ZnO composites were obtained. The surface modification led to significant improvement in the response of the ZnO sensors to 2-EH. Cable fire simulation tests were also conducted to evaluate the response of optimized gas sensors to overheated conventional and phthalate-free cables in comparison with a typical smoke detector. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Recommanded Product: 5444-75-7

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

Assignment of configurations of conjugated dienic pheromones by fuzzy classification of carbon-13 chemical shifts was written by Zhang, Youjie;Huang, Wenfang;Zhu, Jun. And the article was included in Analytica Chimica Acta in 1990.Safety of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

The configurations of conjugated dienes, and some sex pheromones and analogous compounds, can be characterized by a fuzzy classification method applied to the ¹³C chem. shifts of the dienic carbons. A fuzzy relation matrix of 12 model dienes is set up, and a fuzzy parameter (λ) is established. If λ â‰?.95 in the similarity test of two dienes, then both dienes have the same configuration. Some empirical rules dealing with the influence of terminal groups and assignment of the order of dienic carbons are presented. Configurations of 14 compounds prepared by different methods were established reliably. After correct assignments of dienic carbons, the method was used to quantify the isomeric composition of (10,12)-pentadecadienyl acetate, (9,11)-tridecadienyl acetate and (9,11)-tetradecadienyl acetate by the inverted gated decoupling technique; the results agreed well with those obtained by gas chromatog. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Safety of (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Safety of (E)-Dodeca-9,11-dien-1-yl acetate

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

The composition of the aroma of Serapias orchids in Basilicata (Southern Italy) was written by D’Auria, Maurizio;Lorenz, Richard;Mecca, Marisabel;Racioppi, Rocco;Romano, Vito Antonio. And the article was included in Natural Product Research in 2021.Safety of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

The SPME-GC-MS anal. of the aroma components of Serapias cordigera, Serapias cordigera subsp. lucana, Serapias vomeracea, Serapias lingua, and Serapias parviflora were reported. The relevant components of the scent of Serapias cordigera were α-amorphene, Et oleate, heneicosane, heptadecane, 2-heptadecanone, Et elaidate, pentadecane, octadecane, farnesylacetaldehyde, nonadecane, and Et stearate. Serapias cordigera subsp. lucana gave α-amorphene, pentadecane, Pr undecanoate, heptadecane, Et elaidate and oleate, Et stearate, and 8-heptadecene. Serapias vomeracea showed pentadecane, 5-nonadecene, 1-nonadecene, 3-heptadecene, benzyl benzoate, 2-undecanone, and octadecane. Serapias lingua showed the presence of heptadecane, 3-heptadecene, iso-Pr myristate, pentadecane, nonadecane, iso-Pr palmitate, octadecane, and benzyl benzoate. Serapias parviflora gave pentadecane, pentadecene, hexadecane, heptadecane, nonadecane, and Et elaidate. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Safety of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Safety of 2-Ethylhexyl benzoate

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

Identification of odorous constituents of southern yellow pine and China fir wood: the effects of extractive removal was written by Liu, Ru;Wang, Chen;Huang, Anmin;Lv, Bin. And the article was included in Analytical Methods in 2018.Quality Control of 2-Ethylhexyl benzoate The following contents are mentioned in the article:

In this study, the odors of two types of softwood species, namely southern yellow pine (Pinus spp.) and China fir (Cunninghamia lanceolata (Lamb.) Hook.), were identified and extracted with ethanol-toluene for the removal of extractives. The odorous components of neat and extracted wood were identified via gas chromatog.-mass spectrometry/olfactometry (GC-MS/O). The results showed that about 40 key identified volatile compounds (peak area above 0.2%) were detected from the GC-MS data, and more than 50 kinds of odorants were identified using GC-O. The time concentrated on was from 15 to 33 min for GC-O, which was different to the time concentrated on for GC-MS. The amounts of both volatile compounds and odorants in pine were more than in fir. After extraction, the amounts and intensities of some odorants decreased, while some remained. However, the extraction process resulted in benzene residue and led to increased benzene odor. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Quality Control of 2-Ethylhexyl benzoate).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of 2-Ethylhexyl benzoate

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

Esterification of Tertiary Amides by Alcohols Through C-N Bond Cleavage over CeO₂ was written by Toyao, Takashi;Nurnobi Rashed, Md.;Morita, Yoshitsugu;Kamachi, Takashi;Hakim Siddiki, S. M. A.;Ali, A. Md.;Touchy, A. S.;Kon, Kenichi;Maeno, Zen;Yoshizawa, Kazunari;Shimizu, Ken. And the article was included in ChemCatChem in 2019.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

CeO₂ was found to promote ester forming alcoholysis reactions of tertiary amides. The present catalytic system was operationally simple, recyclable and it does not require additives. The esterification process displayed a wide substrate scope (>45 examples; up to 93 % isolated yield). Results of a d. functional theory (DFT) study combined with in-situ FT-IR observations indicated that the process proceeded through rate limiting addition of a CeO₂ lattice oxygen to the carbonyl group of the adsorbed acetamide species with energy barrier of 17.0 kcal/mol. This value matched well with exptl. value (17.9 kcal/mol) obtained from anal. of the Arrhenius plot. Further studies by in-situ FT-IR and temperature programmed desorption using probe mols. demonstrated that both acidic and basic properties were important and consequently, CeO₂ showed the best performance for the C-N bond cleavage reaction. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: 5444-75-7

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

Anionic polymerization of fluorine-containing vinyl monomers. 6. Polymerizations of fluoroalkyl acrylates and methacrylates initiated by organoaluminum compounds was written by Narita, Tadashi;Hagiwara, Tokio;Hamana, Hiroshi;Miyasaka, Takehiko;Wakayama, Akira;Hotta, Tetsuo. And the article was included in Makromolekulare Chemie in 1987.Name: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:

The anionic polymerizations of 2,2,2-trifluoroethyl acrylate (I), 2,2,2-trifluoroethyl methacrylate (II), 2,2,2-trifluoro-1-trifluoromethylethyl acrylate, and 2,2,2-trifluoro-1-trifluoromethylethyl methacrylate (III) were examined with Et₃Al and diethylaluminum active methylene chelate compounds as initiators. III was polymerized with Et₃Al. Diethyl(Et cyanoacetato)aluminum produced polymers of I and II. Diethyl(acetylacetonato)aluminum and diethyl(di-Me malonato)aluminum, however, showed low reactivity towards these 4 monomers. The resulting polymers showed unimodal mol. weight distribution with number-average mol. weights of 10⁴-10⁵, measured by gel chromatog. The initiation reaction and the copolymerization reactivity with styrene supported the anionic polymerization mechanism. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Name: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Name: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate

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

Temperature and Pressure Dependence of the Viscosities of 2-Ethylhexyl Benzoate, Bis(2-ethylhexyl) Phthalate, 2,6,10,15,19,23-Hexamethyltetracosane (Squalane), and Diisodecyl Phthalate was written by Harris, Kenneth R.. And the article was included in Journal of Chemical & Engineering Data in 2009.Recommanded Product: 5444-75-7 The following contents are mentioned in the article:

The viscosities of the esters 2-ethylhexyl benzoate (EHB), bis(2-ethylhexyl) phthalate (DEHP), and the long-chain hydrocarbon 2,6,10,15,19,23-hexamethyltetracosane (squalane, C₃₀H₆₂) have been measured between (0 and 80)° with a falling-body viscometer to a maximum pressures of (315, 371, and 379) MPa, resp. The expanded uncertainty is estimated at ±2%. These substances are possible alternatives to diisodecyl phthalate (DIDP) as reference materials for viscometry at moderate to high pressures. In addition, further measurements for DIDP are reported in the range (0.1 to 90) MPa and (25 to 75)° to supplement those given by K.R. Harris and S. Bair (2007). The data have also been fitted as a function of the quantity (TV^γ) using the thermodn. scaling method of C.M. Roland et al.(2006), yielding scaling parameters, γ, equal to 3.69, 3.65, 4.16, and 3.96 for EHB, DEHP, squalane, and DIDP, resp. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Recommanded Product: 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: 5444-75-7

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