Category: esters-buliding-blocks

Liu, Yan-Song published the artcileHPLC detection and evaluation of chiral compounds with a laser-based chiroptical detector, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is LC-GC (1999), 17(10), 946, 948, 950, 952, 954, 956-957, database is CAplus.

The sensitivity and ruggedness of chiroptical detectors have improved considerably during the past decade. The authors examine >230 chiral compounds using the latest laser-based polarimetry detector for HPLC. They also examine the relation between optical rotation at the detector wavelength of 675 nm and the sodium D line. The authors consider the sensitivity, linear dynamic range, and effect of solvent composition on rotation and its general use as an HPLC detector for chiral compounds

LC-GC published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Recommanded Product: (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Qin, Zezhao published the artcileNonswellable and Tough Supramolecular Hydrogel Based on Strong Micelle Cross-Linkings, Related Products of esters-buliding-blocks, the publication is Biomacromolecules (2019), 20(9), 3399-3407, database is CAplus and MEDLINE.

Because of the difference in osmotic pressure, most tough hydrogels swell under physiol. conditions, which seriously weakens their mech. properties, limiting their applications in biomedicine. Herein, a novel strategy based on strong and high-d. micelle cross-linkings is proposed to prepare nonswellable and tough hydrogel. To realize a strong micelle cross-linker, the synergetic effect of hydrophobic and quadruple hydrogen-bonding interactions is employed by introducing an alkyl chain-protected ureido pyrimidinone moiety into a segmented copolymer backbone. The length of the alkyl is the key factor in determining the strength of the hydrophobic interaction, which was carefully tailored to gain micelles with high strength and suitable solubility A supramol. hydrogel was formed in situ by simply linking micelle cross-linkers with poly(ethylene glycol) chains. The strong and high-d. micelle cross-linkings restrain multiple effective chains outside the micelle from stretching during swelling, and the deformability of micelle cross-linkings disperses the local stress to maintain the network with high crosslinking d. upon loading. Therefore, the hydrogel exhibited an outstanding nonswelling behavior under physiol. conditions and excellent mech. properties with a compressive strength of 4 MPa. The rapid in situ gelation also facilitated injection and cell encapsulation. Meanwhile, it also showed good tissue adhesion, cytocompatibility, and suitable degradability. This novel and facile strategy can offer new insights into the exploitation of cross-linkings to prepare nonswellable hydrogels for biomedical applications.

Biomacromolecules published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Qin, Zezhao published the artcileInjectable and Cytocompatible Dual Cross-Linking Hydrogels with Enhanced Mechanical Strength and Stability, SDS of cas: 517-23-7, the publication is ACS Biomaterials Science & Engineering (2020), 6(6), 3529-3538, database is CAplus and MEDLINE.

Injectable hydrogels have become increasingly important in the fields of tissue engineering and drug delivery. However, their biol. applications are greatly limited by the weak mechanics and poor stability under a physiol. environment. Herein, we developed a stable, strong, and injectable hydrogel by linking strong micelle crosslinking with tetra-armed PEG. This dual crosslinking strategy has not only made hydrogels nonswelling but also maintained the relative integrity of the gel network during the degradation process, both of which work together to ensure the mech. strength and stability of our hydrogel under a physiol. environment. A compressive stress of 40 MPa was achieved at 95% strain, and the mech. properties could remain stable even after immersion into a physiol. environment for two months. Besides, it also showed outstanding antifatigue properties, good tissue adhesion, and good cytocompatibility. On the basis of these characteristics, these dual crosslinking injectable hydrogels would find appealing application in biomedicine especially for the repair of load-bearing soft tissues.

ACS Biomaterials Science & Engineering published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, SDS of cas: 517-23-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yao, Xiang published the artcilePreparation of cinnamon hydroxamic acid and its flotation characteristics and mechanism to fine-grained wolframite, Name: Methyl 3-phenyl-2-propenoate, the publication is Journal of Molecular Liquids (2022), 119721, database is CAplus.

A new collector-cinnamon hydroxamic acid (CIHA)-was synthesized from Me cinnamate using the hydroxyamine method. The results of single-mineral flotation and artificially mixed-mineral flotation indicated that CIHA had good collection performance and selectivity. Adsorption-capacity test results indicated that the CIHA collector adsorbed wolframite and quartz, and the adsorption intensity of wolframite was higher than that of quartz. The adsorption mechanism was investigated via zeta-potential anal., Fourier transform IR spectroscopy, and XPS. The results indicated that CIHA interacted with Mn on the wolframite surface via Pb²⁺ activation to form a surface Mn-O-Pb²⁺ complex, which formed a new Fe-O bond with Fe. Hydroxamic acid may have formed a five-element chelated hydroxamic group with the metal on the wolframite surface. The hydrophobicity of the wolframite surface was improved, making the wolframite more easily attach to bubbles and be more easily carried to the pulp surface.

Journal of Molecular Liquids published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C5H8N2O, Name: Methyl 3-phenyl-2-propenoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Gao, He published the artcileUltraviolet light-responsive polyacrylate film with high fatigue resistance, Computed Properties of 31570-04-4, the publication is Journal of Polymer Research (2022), 29(2), 46, database is CAplus.

Photochromic materials with stable properties during long-term use have a very broad application prospect. Herein, five kinds of spirooxazines (SO1-SO5) with antioxidant properties were successfully synthesized by blending and covalently bonding antioxidants. Then various photochromic polyacrylate laminating adhesives (PA1-PA7) with good fatigue resistance were prepared by incorporating spirooxazines into polyacrylate. Among them, this study used 2, 6 -di-tert-butyl-4-methylphenol (BHT) as the main antioxidant, and tris (2, 4-di-tert-butylphenyl) phosphite (168) as the auxiliary antioxidant. Upon UV activation, these PA films possessed superior photochromism and light responsiveness. Importantly, unlike traditional phys. blending photochromic polymers, SO₂ was successfully covalently bonded into PA through reaction (PA6), effectively improving the fatigue resistance and thermal stability of the PA film. Doping with BHT, it further improved the photochromic properties of the compound film (PA7).

Journal of Polymer Research published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Computed Properties of 31570-04-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Guo, Guangzhong published the artcileStudy on the resolution of geometric isomers of insect sex pheromones with capillary column GC, Formula: C14H26O2, the publication is Youji Huaxue (1984), 349-54, database is CAplus.

Geometric isomers of cis– and trans-dodecen-1-ol and their acetates were resolved by capillary gas chromatog. Seven different stationary phases were compared: XE-60, DEGS, PEG, FFAP, QF-1, OV-17, and OV-351. Retention times and Kovats indexes are shown.

Youji Huaxue published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Formula: C14H26O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dong, Jie published the artcileManganese-catalysed divergent silylation of alkenes, Category: esters-buliding-blocks, the publication is Nature Chemistry (2021), 13(2), 182-190, database is CAplus and MEDLINE.

Transition-metal-catalyzed, redox-neutral dehydrosilylation of alkenes is a long-standing challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. The authors report a general and simple method for the Mn-catalyzed dehydrosilylation and hydrosilylation of alkenes, with Mn₂(CO)₁₀ as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio of alkenes and silanes, and the synthetic robustness and practicality of this method are demonstrated using complex alkenes and light olefins. The selectivity of the reaction was studied using d. functional theory calculations, showing the use of an ⁱPrPNP ligand to favor dehydrosilylation, while a JackiePhos ligand favors hydrosilylation. The reaction is redox-neutral and atom-economical, exhibits a broad substrate scope and excellent functional group tolerance, and is suitable for various synthetic applications on a gram scale. [graphic not available: see fulltext].

Nature Chemistry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhang, Muliang published the artcileDeoxygenative Deuteration of Carboxylic Acids with D₂O, Product Details of C9H8O4, the publication is Angewandte Chemie, International Edition (2019), 58(1), 312-316, database is CAplus and MEDLINE.

C1-Deuterated aryl and alkyl aldehydes such as 4-PhC₆H₄CDO and PhCH₂CH₂CDO were prepared chemoselectively with 58-96% deuterium incorporation by reduction of aromatic and aliphatic carboxylic acids using iridium photocatalysts, either Ph₃P or Ph₂OEt as an oxygen acceptor, 2,4,6-i-Pr₃C₆H₂SH as a hydrogen atom donor, and using D₂O as an inexpensive deuterium source. The method was used for the preparation of deuterated derivatives of pharmaceuticals and natural products containing aromatic carboxylic acid moieties. The method was also used for chemoselective reduction of aryl and alkyl carboxylic acids to the corresponding aldehydes using H₂O as a hydrogen atom source.

Angewandte Chemie, International Edition published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C11H21BF4N2O2, Product Details of C9H8O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Guo, Shengrong published the artcileHighly efficient catalyst-free one-pot synthesis of dithiocarbamates under solvent-free conditions, SDS of cas: 3052-61-7, the publication is Youji Huaxue (2012), 32(5), 907-914, database is CAplus.

A highly efficient and simple synthesis of dithiocarbamates is reported in the one-pot reaction of amines, CS₂, and alkyl halides without using a catalyst under solvent-free conditions. The mild reaction conditions, high yields, and broad scope of the reaction illustrate the good synthetic utility of this method. The reaction is a highly atom-economic process for production of dithiocarbamates and can be successfully used in large amount for the pharmaceutical or agrochem. industries.

Youji Huaxue published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, SDS of cas: 3052-61-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Huiqun published the artcileInfluence of hydrolysis rate of carboxylates on dispersion performance of slow-release polycarboxylate superplasticizer, Recommanded Product: Dimethyl itaconate, the publication is Guisuanyan Xuebao (2020), 48(2), 246-252, database is CAplus.

To study the influence of unsaturated carboxylate on the dispersing and flow releasing ability of slow-release polycarboxylate superplasticizer (PCE), the hydrolysis behaviors of carboxylates in sodium hydroxide solution at pH value of 12.0 was investigated, and the constants of hydrolysis rate were derived via a linear fitting. Mini slump was used to examine the variation of flow of cement pastes containing the synthesized slow releasing PCE over time, and the results were compared and analyzed to coordinate the relationship of hydrolysis behaviors of carboxylates and slow-release effectiveness of PCE. The results indicate that PCE with the substitution of acrylic acid with 33.3% Me acrylate and 25.0% di-Me itaconate showed significant slow-release effect, the initial fluidity of cement paste was 149 mm and 104 mm afterwards increased to 223 mm and 212 mm after 2 h resp. PCE with carboxylate monomer of faster hydrolysis rate exhibited quicker flow releasing property, and PCE with carboxylate monomer containing more ester grouped manifested stronger flow releasing ability, but need longer time. The flow releasing property of PCE not only depended on the hydrolysis rate and ester group amount of monomer, but also related to its reactivity of monomer to match the copolymerization system.

Guisuanyan Xuebao published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, Recommanded Product: Dimethyl itaconate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics