Esters-buliding-blocks

Pizarro, Guadalupe del C. published the artcileMorphological, optical and wettability characterization of honeycomb patterned films based on self-assembling copolymer under thermal annealing, Recommanded Product: Dimethyl itaconate, the publication is Chemical Physics (2020), 110715, database is CAplus.

A series of honeycomb-patterned porous films based on self-assembly block copolymers with different hydrophilic blocks were prepared using the breath figure (BF) method. The variation of hydrophilic moieties into the block copolymers provokes a response in the pore diameter size dispersity and in the surface pore distribution entropy. The morphol. properties are examined using SEM and AFM microscopies, wettability properties were also studied. The distribution of the pores at the surface and shape variations of the structured films were studied by Raman spectroscopy before and after thermal annealing. We report a significant increase of the order and dispersity narrowing of the pores after thermal annealing which affects the water contact angle (WCA). These results were attributed to the process mechanism of the polymer chain self-assembly of the different hydrophilic moieties as a result of thermal annealing at temperatures below the glass transition temperature (T_g).

Chemical Physics 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

Pizarro, Guadalupe del C. published the artcileMicroporous hybrid films from amphiphilic copolymers: surface coated with ZnS nanoparticles using the breath figure (BF) methodology, Safety of Dimethyl itaconate, the publication is Chemical Papers (2020), 74(8), 2605-2612, database is CAplus.

High-performance catalysts and photovoltaics form key components for various technol. applications. Because catalytic and photovoltaic reactions occur at the interfaces between reactants and surfaces, the chem., phys., and structural properties of interfaces have been the focus of many studies. One route towards the improvement and optimization of such interfaces is the preparation of microporous materials from amphiphilic copolymers, which can also be surface coated with inorganic nanoparticles to obtain different properties. In this work, we have prepared microporous hybrid films with fluorescent properties from amphiphilic block copolymers surface coated with ZnS (NPs) based on the breath figure (BF) mechanism, keeping constant the concentration of ZnS NPs, solvent, humidity and substrates. The morphol. and optical properties were investigated by microscopic and optical characterization techniques. As a result, the fabrication method facilitates the preparation of fluorescent porous films with varying morphol. properties (shapes and diameter pore). The hybrid porous films containing polystyrene-b-polyacrylic acid, polystyrene-b-polyitaconic acid and polystyrene-b-polydialylmalonic acid were obtained with an average pore size of 0.57 ± 0.04 μm, 0.78 ± 0.03 μm and 1.50 ± 0.04 μm, resp. An increase in the water contact angle (WCA) was observed in the block copolymer porous films after functional process with ZnS (NPs).

Chemical Papers 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, Safety of Dimethyl itaconate.

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

Jiang, Tiankai published the artcileThe effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE, Category: esters-buliding-blocks, the publication is Polymers for Advanced Technologies (2021), 32(12), 4915-4925, database is CAplus.

In order to improve the aging resistance of HDPE, antioxidants (Irganox1010 and Irgafos168) are combined with UV absorber (UV-326 or UV-531). Analyses of UV-visible (UV-vis) and Fourier transform IR spectroscopy show that UV-326 has a better capacity of UV absorbance, but easier to migrate to the HDPE surface due to the bigger difference of solubility parameter with HDPE than UV-531. The mech. property indicates a better synergistic effect between UV-531 and antioxidants. With the single addition of antioxidant, the mech. property sharply decreased to low level during irradiation for 200 h. With single addition of UV absorber, the elongation at break of the sample can still be maintained at about 700% until irradiation for 600 h. When two different UV absorbers are used in combination with antioxidants, HDPE with UV-326 maintains high mech. property when irradiated for 1200 h, while the samples containing UV-531 still maintain good mech. property when irradiated for 1600 h.

Polymers for Advanced Technologies 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

Nareddy, Pradeep published the artcileAtropoisomeric (P,N) Ligands for the Highly Enantioselective Pd-Catalyzed Intramolecular Asymmetric α-Arylation of α-Branched Aldehydes, COA of Formula: C22H12F6O6S2, the publication is Angewandte Chemie, International Edition (2012), 51(16), 3826-3831, S3826/1-S3826/106, database is CAplus and MEDLINE.

A short synthetic route readily gives access to a new class of chiral (P,N) ligands characterized by three distinct elements of chirality: axial, central at C and central at P. These ligands are highly enantioselective in Pd-catalyzed intramol. asym. α-arylation of α-branched aldehydes [e.g., I → II].

Angewandte Chemie, International Edition 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, COA of Formula: C22H12F6O6S2.

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

Sajedi, Mohammad published the artcile2-Pyridyl-Benzimidazole-Pd(II) Complex Supported on Magnetic SBA-15: An Efficient and Magnetically Retrievable Catalyst for the Heck Reaction, Quality Control of 103-26-4, the publication is ChemistrySelect (2021), 6(46), 13060-13067, database is CAplus.

2-(2′-Pyridyl)benzimidazole (PyBzIm) was grafted onto magnetic mesoporous silica particles (Fe₃O₄@SBA) via a simple click reaction, and then further reacted with Na₂PdCl₄ in methanol. The catalyst, Fe3O4@SBA-PyBzIm-Pd(II), was characterized by FT-IR, thermogravimetric anal. (TGA), vibrating sample magnetometry (VSM), Brunauer-Emmett-Teller surface area measurement (SBET), and wide-angle X-ray diffraction spectroscopy (XRD). XPS studies confirmed some C=N nitrogen atoms interacted with palladium in the +2 oxidation state. The supported complex was found to catalyze the Heck cross-coupling reaction of aryl halides and olefins. The catalyst also presented excellent recycling efficiency over six consecutive runs without significant loss of reactivity.

ChemistrySelect 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 C10H10O2, Quality Control of 103-26-4.

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

Ranganathan, S. published the artcileMetamorphosis of castor oil to insect sex-pheromones and useful synthons, Synthetic Route of 16974-11-1, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1984), 23B(12), 1197-207, database is CAplus.

The primary fragmentation products of castor oil, namely, Me undec-10-enoate and sebacic acid were converted into synthons I (n = 7-10). A surprisingly clean decarboxylative elimination of sebacic acid monoester gives Me non-8-enoate, a synthon related to recefeiolide and a precursor to I (n = 7), the utility of which, was illustrated with the synthesis of phermomones of Grapholita molesta. Me dec-9-enoate was prepared from Me undec-10-enoate. Me non-8-enoate was transformed via I (n = 8) to the pheromones of Spodoptera frugiperda, Heliothis virescens and Paralobesia viteana. I (n = 9), readily prepared from Me undec-10-enoate, was used to illustrate a new strategy in pheromone synthesis, namely, the use of coupling elements, leading to the preparation of bombykol in high yields and excellent stereochem. purity. I (n = 10), already reported, was transformed to vaccenic acid, the transposed π-isomer of oleic acid, in good yields, thus demonstrating the use of acetylide synthons for the preparation of rare fatty acids.

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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, Synthetic Route of 16974-11-1.

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

Yu, Eric published the artcileHigh-yielding continuous-flow synthesis of antimalarial drug hydroxychloroquine, COA of Formula: C6H8O3, the publication is Beilstein Journal of Organic Chemistry (2018), 583-592, database is CAplus and MEDLINE.

Numerous synthetic methods for the continuous preparation of fine chems. and active pharmaceutical ingredients (API’s) have been reported in recent years resulting in a dramatic improvement in process efficiencies. Herein authors report a highly efficient continuous synthesis of the antimalarial drug hydroxychloroquine (HCQ). Key improvements in the new process include the elimination of protecting groups with an overall yield improvement of 52% over the current com. process. The continuous process employs a combination of packed bed reactors with continuous stirred tank reactors for the direct conversion of the starting materials to the product. This high-yielding, multigram-scale continuous synthesis provides an opportunity to achieve increase global access to hydroxychloroquine for treatment of malaria.

Beilstein Journal of Organic Chemistry 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 C9H5ClO2, COA of Formula: C6H8O3.

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

Gabriele, Bartolo published the artcileSynthesis of Substituted Thiophenes by Palladium-Catalyzed Heterocyclodehydration of 1-Mercapto-3-yn-2-ols in Conventional and Nonconventional Solvents, Product Details of C5H10O2S, the publication is Journal of Organic Chemistry (2012), 77(21), 9905-9909, database is CAplus and MEDLINE.

A variety of readily available 1-mercapto-3-yn-2-ols were conveniently converted into the corresponding thiophenes in good to high yields in MeOH as the solvent at 50-100 °C in the presence of catalytic amounts (1-2%) of PdI₂ in conjunction with KI (KI:PdI₂ molar ratio = 10). The catalyst could be made recyclable employing an ionic liquid, such as BmimBF₄, as the solvent under suitable conditions.

Journal of Organic Chemistry published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Product Details of C5H10O2S.

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

Gabriele, Bartolo published the artcileAn Iodocyclization Approach to Substituted 3-Iodothiophenes, Safety of Ethyl 2-mercaptopropanoate, the publication is Journal of Organic Chemistry (2012), 77(17), 7640-7645, database is CAplus and MEDLINE.

A novel approach to 3-iodothiophenes by direct iodocyclization of alkynylthiol derivatives is presented. A variety of 1-mercapto-3-yn-2-ols (readily available from alkynylation of the corresponding alpha-mercapto ketones or alpha-mercapto esters) were smoothly converted into the corresponding 3-iodothiophene derivatives in good yields by reaction with mol. iodine in the presence of NaHCO₃ at room temperature in MeCN as the solvent.

Journal of Organic Chemistry published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Safety of Ethyl 2-mercaptopropanoate.

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

Pansare, Sunil V. published the artcileMagnesium bromide catalyzed acylation of alcohols, Safety of 3-Methylbut-2-en-1-yl benzoate, the publication is Synthetic Communications (2000), 30(14), 2587-2592, database is CAplus.

Magnesium bromide is an efficient catalyst for the acetylation and benzoylation of a variety of primary and secondary alcs. with the resp. acid anhydrides at ambient temperature Acetylation of tertiary alcs. requires subambient temperature to suppress competing dehydration. Coordinating solvents retard the acylation process.

Synthetic Communications published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, Safety of 3-Methylbut-2-en-1-yl benzoate.

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