Tag: 200-300

A versatile approach to the reproducible synthesis of functionalized polysiloxane stationary phases was written by Frank, Hartmut;Abe, Iwao;Fabian, Gerd. And the article was included in Journal of High Resolution Chromatography in 1992.Recommanded Product: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate The following contents are mentioned in the article:

Exploitation of the full potential of selector-modified polysiloxanes as chromatog. stationary phases is limited because conventional methods of silicone synthesis involve strong acids or strong nucleophiles such as water or bases; under these conditions many potentially useful selectors decompose The general approach to polysiloxane synthesis presented herein gives access to functionalized polysiloxanes under mild conditions. Polysiloxanes containing ureido, amino, or chiral L(D)-valine tert-butylamide groups are prepared by functionalization of disodium tetramethyldisiloxane-1,3-diolate (I)-3-(dichloromethylsilyl)propyl isocyanate and I-3-dichloromethylsilyl-2-methylpropionic 1,1,1,3,3,3-hexafluoroisopropyl ester copolymers. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Recommanded Product: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate).

1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3) 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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Recommanded Product: 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate

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

Chemical Upcycling of Waste Poly(bisphenol A carbonate) to 1,4,2-Dioxazol-5-ones and One-Pot C-H Amidation was written by Jung, Hyun Jin;Park, Sora;Lee, Hyun Sub;Shin, Hyun Gyu;Yoo, Yeji;Baral, Ek Raj;Lee, Jun Hee;Kwak, Jaesung;Kim, Jeung Gon. And the article was included in ChemSusChem in 2021.Product Details of 102-09-0 The following contents are mentioned in the article:

Chem. upcycling of poly(bisphenol A carbonate) (PC) was achieved in this study with hydroxamic acid nucleophiles, giving rise to synthetically valuable 1,4,2-dioxazol-5-ones and bisphenol A. Using 1,5,7-triazabicyclo[4.4.0]-dec-5-ene (TBD), non-green carbodiimidazole or phosgene carbonylation agents used in conventional dioxazolone synthesis were successfully replaced with PC, and environmentally harmful bisphenol A was simultaneously recovered. Assorted hydroxamic acids exhibited good-to-excellent efficiencies and green chem. features, promising broad synthetic application scope. In addition, a green aryl amide synthesis process was developed, involving one-pot depolymerization from polycarbonate to dioxazolone followed by rhodium-catalyzed C-H amidation, including gram-scale examples with used compact disks. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Product Details of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) 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. 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.Product Details of 102-09-0

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

Purification and characterization of an acyclic monoterpene primary alcohol:NADP⁺ oxidoreductase from catmint (Nepeta racemosa) was written by Hallahan, David L.;West, Jevon M.;Wallsgrove, Roger M.;Smiley, Diane W. M.;Dawson, Glenn W.;Pickett, John A.;Hamilton, James G. C.. And the article was included in Archives of Biochemistry and Biophysics in 1995.Recommanded Product: 37905-02-5 The following contents are mentioned in the article:

A soluble monoterpene primary alc.:NADP⁺ oxidoreductase has been purified to apparent homogeneity from leaves of the catmint, Nepeta racemosa. The purified enzyme consisted of two polypeptides, with mol. masses of 42,000 and 40,000 Da, and contained zinc ions. A number of monoterpene alcs. (geraniol, nerol, citronellol, and their hydroxylated derivatives) were substrates, but the enzyme was inactive toward ethanol. The enzyme required NADP(H) as cofactor, with NAD(H) being ineffective. Gas chromatog. and coupled mass spectrometric anal. of the reaction products showed that 10-hydroxygeraniol and 10-hydroxynerol were oxidized by the enzyme in the presence of NADP⁺, at both C-1 and C-10. These results are consistent with a role for this enzyme in the biosynthesis of iridoid monoterpenes. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Recommanded Product: 37905-02-5).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. 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: 37905-02-5

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

Alkylation of diene allylic tertiary amines with Grignard reagents. In situ activation with alkyl chloroformates was written by Langlois, Yves;Nguyen Van Bac;Fall, Yagamare. And the article was included in Tetrahedron Letters in 1985.Safety of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

Diene-allylic tertiary amines (Z,E)-RCH:CHCH:CHCH₂NMe₂ (R = H, Me) were substituted by R¹(CH₂)_nMgCl (R¹ = OSiMe₂CMe₃, n = 7; R¹ = 2-tetrahydropyranyloxy, n = 6, 7; R¹ = Ph, n = 1) in the presence of Li₂CuCl₄and ClCO₂R² (R² = Me, CH₂CH₂OMe) to give dienes (Z,E)- and/or (E,E)- RCH:CHCH:CH(CH₂)_n+1R¹ and/or RCH:CHCH(CH:CH₂)(CH₂)_nR¹ (I). Under some conditions, the reaction afforded I exclusively. 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 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. 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.Safety of (E)-Dodeca-9,11-dien-1-yl acetate

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

Regio- and stereoselective oxidation of gem-dimethyl olefins via [2,3]-sigmatropic rearrangement of allyl amine oxides was written by Inoue, Seiichi;Iwase, Norimichi;Miyamoto, Osamu;Sato, Kikumasa. And the article was included in Chemistry Letters in 1986.Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Highly regio- and stereoselective oxidation sequences are described for the efficient conversion of the gem-di-Me alkene terminus of acyclic terpenes to terminal trans-allylic alcs. and trans-α,β-unsaturated aldehydes. Thus, chlorination of CH₂:CMeCH₂R (R = CH₂CMe:CHCH₂OCH₂Ph) by Ca(OCl)₂ in CH₂Cl₂-H₂O containing dry ice, followed by amination with Me₂NH, gave CH₂:CMeCH(NMe₂)R, which underwent oxidation with AcOOH to give the N-oxide; this, when treated with Zn in aqueous AcOH, gave quant. HOCH₂CMe:CHCH₂R. Treating the N-oxide with R¹X (R¹ = Me, allyl) in refluxing CHCl₃ gave quant. RCH₂CH:CMeCHO. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) 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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Recommanded Product: (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

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

New coalescent for the graphic arts industry: 2-ethylhexyl benzoate was written by Arendt, William;Strepka, Arron;Lavelle, Jean;Gallagher, Jo. And the article was included in Proceedings of the International Waterborne, High-Solids, and Powder Coatings Symposium in 2004.Application of 5444-75-7 The following contents are mentioned in the article:

A new coalescing agent, 2-ethylhexyl benzoate (2EHB), having low volatility was used in waterborne overprint varnish (OPV) and printing ink formulations based on hard styrene-acrylate resin emulsions (Joncryl 89) to assist in film formation. Unlike the commonly used glycol ethers, 2EHB was insoluble in water and partitioned into the emulsion polymer. The waterborne OPV and flexog. ink formulations containing 2EHB were compared to formulations containing diethylene glycol monobutyl ether (DEGB), dipropylene glycol monomethyl ether, Carbitol, Butyl Carbitol, and 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate. The results indicated that 2EHB performed as well as or better than DEGB in the model OPV and flexog. ink formulations. On some substrates, 2EHB was more efficient than DEGB in enhancing water resistance and rub resistance. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Application of 5444-75-7).

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. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Application of 5444-75-7

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

Comparison of single cell responses of antennal sensilla trichodea in the nine European small ermine moths (Yponomeuta spp.) was written by Van der Pers, J. N. C.. And the article was included in Entomologia Experimentalis et Applicata in 1982.Name: (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

Single cell recordings were made from antennal sensilla trichodea of males of the 9 European small ermine moths by the tip-recording technique. Seventeen chem. were used as stimuli. Two or 3 electrophysiol. types of sensilla trichodea were found in each species. The response spectra of the receptor cells in these sensilla differed both intra- and interspecifically. Most cell types were sensitive to ≥2 substances, but some types were activated by one substance only. The results suggest that the various species use different multicomponent female sex pheromones. cis-11-Tetradecen-1-ol-acetate and trans-11-tetradecen-1-ol acetate are common components of these pheromones. Reproductive isolation in Yponomeuta may be maintained by different blends of these substances and/or the presence of addnl. compounds This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Name: (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) 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. 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.Name: (E)-Dodeca-9,11-dien-1-yl acetate

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

Redox-Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C-H Di- and Trifluoromethoxylation was written by Lee, Johnny W.;Lim, Sanghyun;Maienshein, Daniel N.;Liu, Peng;Ngai, Ming-Yu. And the article was included in Angewandte Chemie, International Edition in 2020.Recommanded Product: 102-09-0 The following contents are mentioned in the article:

Applications of TEMPO· catalysis for the development of redox-neutral transformations are rare. Reported here is the first TEMPO·-catalyzed, redox-neutral C-H di- and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional-group tolerance, and can be employed for the late-stage functionalization of complex druglike mols. Kinetic measurements, isolation and resubjection of catalytic intermediates, UV/visible studies, and DFT calculations support the proposed oxidative TEMPO·/TEMPO⁺ redox catalytic cycle. Mechanistic studies also suggest that Li₂CO₃ plays an important role in preventing catalyst deactivation. These findings will provide new insights into the design and development of novel reactions through redox-neutral TEMPO· catalysis. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Recommanded Product: 102-09-0).

Diphenyl carbonate (cas: 102-09-0) 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. 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.Recommanded Product: 102-09-0

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

Use of RAFT macro-surfmers for the synthesis of transparent aqueous colloids with tunable interactions was written by Capasso Palmiero, Umberto;Agostini, Azzurra;Lattuada, Enrico;Gatti, Simone;Singh, Jaspreet;Canova, Christopher Thomas;Buzzaccaro, Stefano;Moscatelli, Davide. And the article was included in Soft Matter in 2017.Electric Literature of C7H6F6O2 The following contents are mentioned in the article:

We propose a new method to produce fluorinated nanoparticles (NPs) based on ab initio reversible addition-fragmentation chain transfer (RAFT) emulsion polymerization without the use of toxic surfactants. NP size, surface charge, and chem. can be controlled via the adoption of different macromol. transfer agents produced via RAFT polymerization of amphiphilic monomers. Thanks to this versatility, interparticle interactions can be easily tuned by changing solvent composition and temperature In addition, the refractive index and d. of the solvent can simultaneously match those of the NPs by adding sodium polytungstate, an organic salt widely used for d. gradient centrifugation. These colloids may be used as model systems for the study of self-assembly and aggregation in aqueous media when optical methods are required. This study involved multiple reactions and reactants, such as 1,1,1,3,3,3-Hexafluoroisopropylmethacrylate (cas: 3063-94-3Electric Literature of C7H6F6O2).

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. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Electric Literature of C7H6F6O2

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

Recycling system that converts plastic into fertilizer was written by Aoki, Daisuke;Otsuka, Hideyuki. And the article was included in Konbatekku in 2022.Quality Control of Diphenyl carbonate The following contents are mentioned in the article:

More than 70% of the polymer materials (plastics) that are indispensable for daily life are discarded. In order to recycle plastics, it is necessary to selectively collect only plastics from all waste products and carry out a recycling process according to the type of plastics, but the problem to be solved in any case is is left. Focusing on the recycling process related to this article, two typical recycling processes (material recycling and chem. recycling) can be briefly mentioned by collecting, processing and reusing used plastics. In “Material Recycling”, the color is suitable due to foreign matter contamination and the quality is deteriorated due to the deterioration of the mol. chamber that occurs in the recycling process. In this article, the author devices a method to degrade the polycarbonates to produce fertilizers for plants from plastic wastes. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Quality Control of Diphenyl carbonate).

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. 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.Quality Control of Diphenyl carbonate

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