Tag: M.W=150-200

Caron, Aurore published the artcileNear-Infrared Photoinitiating Systems: Photothermal versus Triplet-Triplet Annihilation-Based Upconversion Polymerization, Computed Properties of 10287-53-3, the publication is Macromolecular Rapid Communications (2021), 42(11), 2100047, database is CAplus and MEDLINE.

NIR light-induced polymerization has attracted more and more attention in the photopolymerization field due to the possibility to use safer and more penetrating wavelengths, reducing the hazardousness. Here, a novel perspective for the free radical polymerization of acrylate-based monomers based on triplet-triplet annihilation upconversion (TTA-UC) is proposed, avoiding the introduction of heavy metals, usually required in the TTA processes. Thermal imaging experiments and Fourier transform IR spectroscopy are resp. used to record the temperature during NIR irradiation and measure the reactive function conversion. The competition between the TTA-UC and the NIR photothermal activation is investigated to compare the relative efficiency of both NIR processes. In view of the results obtained by the different methods, the photothermal effect seems to get the upper hand over the photoactivation of the system.

Macromolecular Rapid Communications published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Computed Properties of 10287-53-3.

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

Wei, Duo published the artcileIron-catalyzed hydrosilylation of diacids in the presence of amines: a new route to cyclic amines, SDS of cas: 627-93-0, the publication is ChemCatChem (2020), 12(21), 5449-5455, database is CAplus.

Herein, a novel chemoselective strategy for building N-substituted cyclic amines I (n = 1, 2, 3; R = H, 4-Me; R¹ = cyclohexyl, 1-(naphthalen-1-yl)ethyl, 2H-1,3-benzodioxol-5-yl, etc.) and 2-(4-methoxyphenyl)-2,3,3a,4,7,7a-hexahydro-1H-isoindole via iron catalyzed one-pot hydrosilylation starting from readily available dicarboxylic acids e.g., pentanedioic acid and amines R¹NH₂, with hydrosilanes as the hydride sources was presented. The described methodol. allows the preparation of a wide range of N-alkylated and arylated cyclic amine derivatives I (including pharmaceuticals Fenpiprane and Prozapine) in moderate to excellent yields, starting from inexpensive succinic, glutaric, and adipic acids with di-Me carbonate as a green solvent.

ChemCatChem published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C7H8BNO4, SDS of cas: 627-93-0.

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

Li, Jingfang published the artcileHydrogen bond complex used as visible light photoinitiating system for free radical photopolymerization: Photobleaching, water solubility, COA of Formula: C11H15NO2, the publication is Progress in Organic Coatings (2021), 106099, database is CAplus.

A type II photoinitiator (2E,6E)-2,6-bis((1H-pyrrol-2-yl)methylene)cyclohexan-1-one(BPC) was conveniently synthesized through Claisen-Schmidt reaction. Hydrogen bond complex BFC/TEOA not only exhibits high photo-reactivity on the visible light polymerization, but also shows rapid bleach, excellent dispersibility in water which could be potential for photo-induced organic coating.

Progress in Organic Coatings published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, COA of Formula: C11H15NO2.

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

Shigehisa, Hiroki published the artcileCobalt-Catalyzed Hydrofluorination of Unactivated Olefins: A Radical Approach of Fluorine Transfer, Recommanded Product: 3-Methylbut-2-en-1-yl benzoate, the publication is Organic Letters (2013), 15(20), 5158-5161, database is CAplus and MEDLINE.

Alkyl fluorides were prepared regioselectively in 41-82% yields by hydrofluorination of alkenes with 1-fluoro-2,4,6-trimethylpyridinium tetrafluoroborate and 1,1,3,3-tetramethyldisiloxane in the presence of a cobalt salen complex; the reactions occurred to give the Markovnikov regioisomers exclusively, tolerated acetal, ester, amide, tosylate, nitro, bromo, and thienyl moieties, and were performed (in three cases) on approx. 1 g scale in similar yields to those found on smaller scale. Reaction of a diallylsulfonamide yielded a fluoroalkylpyrrolidine, implying the generation of a radical intermediate in the hydrofluorination reaction.

Organic Letters 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 C12H25Br, Recommanded Product: 3-Methylbut-2-en-1-yl benzoate.

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

Tanaka, Shinji published the artcileEpoxide as precatalyst for metal-free catalytic transesterification, Related Products of esters-buliding-blocks, the publication is Tetrahedron Letters (2019), 60(30), 2009-2013, database is CAplus.

Transesterification of Me-esters was accelerated by an in situ-generated metal-free catalyst comprising a quaternary alkylammonium salt and an epoxide was developed. The combination of a quaternary alkylammonium acetate and glycidol was optimal, and various esters R¹CO₂R² [R¹ = 2-thiophenyl, Ph, Bn, etc.; R² = 2-Bu, n-C₆H₁₃, Bn, prenyl] were synthesized from Me-esters with alcs. in good to excellent yield. Anal. of the catalyst solution revealed that basic species were generated by the ring-opening reaction of epoxide.

Tetrahedron Letters 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 C12H9N3O4, Related Products of esters-buliding-blocks.

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

Hayashi, Keitaro published the artcileAntitumor effect of dimethyl itaconate on thymic carcinoma by targeting LDHA-mTOR axis, Safety of Dimethyl itaconate, the publication is Life Sciences (2021), 119847, database is CAplus and MEDLINE.

Thymic carcinoma is a rare type of cancer without an established standard pharmaceutical treatment. This study investigated the antitumor effect of di-Me itaconate (DI), a cell-permeable derivative of itaconate, on human thymic carcinoma cell line. Human thymic carcinoma cell line Ty82 was used to evaluate the effect of DI on cell viability. Western blotting and immunohistochem. were performed to determine the mol. mechanism of antitumor effects of DI on Ty82. DI suppressed cell growth and promoted apoptosis of Ty82. The suppressive effect of DI on Ty82 was mediated by the downregulation of lactate dehydrogenase A (LDHA), and the subsequent decrease in the activity of mechanistic target of rapamycin (mTOR). DI exhibited synergistic antitumor effects with a specific inhibitor of large neutral amino acid transporter 1 (LAT1), an amino acid transporter currently being investigated as a novel target for cancer therapy. Our findings demonstrate that DI is a novel potential strategy for thymic carcinoma treatment.

Life Sciences 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

Bian, Kang-Jie published the artcileModular Difunctionalization of Unactivated Alkenes through Bio-Inspired Radical Ligand Transfer Catalysis, Recommanded Product: 3-Methylbut-2-en-1-yl benzoate, the publication is Journal of the American Chemical Society (2022), 144(26), 11810-11821, database is CAplus and MEDLINE.

Herein, the first modular, dual catalytic difunctionalization of unactivated alkenes viz., but-3-en-1-ylbenzene, 3-methylbut-2-en-1-yl benzoate, pent-4-en-1-yl 2-[4-[(2-oxocyclopentyl)methyl]phenyl]propanoate, etc. via manganese-catalyzed radical ligand transfer (RLT) was reported. This RLT elementary step involves a coordinated nucleophile rebounding to a carbon-centered radical to form a new C-X bond in analogy to the radical rebound step in metalloenzymes. The protocol leverages the synergetic cooperation of both a photocatalyst and earth-abundant manganese complex to deliver two radical species in succession to minimally functionalized alkenes, enabling modular diversification of the radical intermediate by a high-valent manganese species capable of delivering various external nucleophiles. A broad scope (97 examples, including drugs/natural product motifs), mild conditions, and excellent chemoselectivity were shown for a variety of substrates and fluoroalkyl fragments. Mechanistic and kinetic studies provide insights into the radical nature of the dual catalytic transformation and support radical ligand transfer (RLT) as a new strategy to deliver diverse functionality selectively to carbon-centered radicals.

Journal of the American Chemical Society 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, Recommanded Product: 3-Methylbut-2-en-1-yl benzoate.

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

Isayama, Shigeru published the artcileNovel method for the preparation of triethylsilyl peroxides from olefins by the reaction with molecular oxygen and triethylsilane catalyzed by bis(1,3-diketonato)cobalt(II), Related Products of esters-buliding-blocks, the publication is Chemistry Letters (1989), 573-6, database is CAplus.

In the presence of a catalytic amount of bis(1,3-diketonato)cobalt(II), various olefins react with mol. oxygen and Et₃SiH at room temperature to give the corresponding triethylsilyl peroxides in high yields under neutral conditions. The reaction provides a new method for the preparation of various peroxides directly from olefins.

Chemistry Letters 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, Related Products of esters-buliding-blocks.

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

Isayama, Shigeru published the artcileHydration of olefins with molecular oxygen and triethylsilane catalyzed by bis(trifluoroacetylacetonato)cobalt(II), Application of 3-Methylbut-2-en-1-yl benzoate, the publication is Chemistry Letters (1989), 569-72, database is CAplus.

In the presence of a catalytic amount of bis(trifluoroacetylacetonato)cobalt(II), various olefins react smoothly with mol. oxygen (oxidant) and triethylsilane (reductant) to afford the corresponding alcs. regioselectively in good yields along with ketones.

Chemistry Letters 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, Application of 3-Methylbut-2-en-1-yl benzoate.

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

Teixeira, Natercia published the artcileIn-depth phenolic characterization of iron gall inks by deconstructing representative Iberian recipes, Recommanded Product: Methyl 3-phenyl-2-propenoate, the publication is Scientific Reports (2021), 11(1), 8811, database is CAplus and MEDLINE.

Iron-gall ink is one of the most important inks in the history of western civilization. The deep black color results from Fe³⁺ complexes with phenolic compounds available in gall extracts Unfortunately, it induces the degradation of both ink and support over time. Furthermore, our knowledge of these complex mol. structures is limited. This work aims to overcome this gap, revealing essential information about the complex structures of these pigments and dyes that will create a breakthrough in the next generation of conservation treatments. It presents the first in-depth phenolic identification and quantification of extracts and inks, prepared with and without gum arabic (an essential additive in medieval recipes). Five representative Iberian recipes were selected and prepared Their phenolic profile was analyzed by HPLC-DAD and HPLC-ESI-MS, which revealed that the phenolic compounds present in higher concentration, in the gall extracts, are pentagalloylglucose and hexagalloylglucose (0.15 ± 0.01-32 ± 3 mg/mL), except for one recipe, in which gallic acid is the main phenolic. The influence of the ingredients is also discussed by deconstructing the recipes: extracts of additives as pomegranate peel and solvents used in the extraction of the galls (vinegar and white wine) were characterized.

Scientific Reports 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 C3H6O2, Recommanded Product: Methyl 3-phenyl-2-propenoate.

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