Month: December 2022

Popovtzer, Rachela published the artcileElectrochemical lab on a chip for high-throughput analysis of anticancer drugs efficiency, HPLC of Formula: 122110-53-6, the publication is Nanomedicine (New York, NY, United States) (2008), 4(2), 121-126, database is CAplus and MEDLINE.

We describe a new method for rapid, sensitive, and high-throughput detection of colon cancer cells’ response to differentiation therapy, using a novel electrochem. lab-on-a-chip system. Differentiation-inducing agents such as butyric acid and its derivatives were introduced to miniature colon cancer samples within the nanovolume chip chambers. The efficacy of each of the differentiation-inducing agents was evaluated by electrochem. detection of the cellular enzymic activity level, whereas reappearance of normal enzymic activity denotes effective therapy. The results demonstrate the ability to evaluate simultaneously multiplex drug effects on miniature tumor samples (∼15 cells) rapidly (5 min) and sensitively, with quant. correlation between cancer cells’ number and the induced current. The use of miniature anal. devices is of special interest in clin. relevant samples, in that it requires less tissue for diagnosis, and enables high-throughput anal. and comparison of various drug effects on one small tumor sample, while maintaining uniform biol. and environmental conditions.

Nanomedicine (New York, NY, United States) published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, HPLC of Formula: 122110-53-6.

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

Yang, Lei published the artcileChiral Bifunctional Phosphine-Carboxylate Ligands for Palladium(0)-Catalyzed Enantioselective C-H Arylation, Safety of (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Angewandte Chemie, International Edition (2018), 57(5), 1394-1398, database is CAplus and MEDLINE.

Previous enantioselective Pd⁰-catalyzed C-H activation reactions proceeding via the concerted metalation-deprotonation mechanism employed either a chiral ancillary ligand, a chiral base, or a bimol. mixture thereof. This study describes the development of new chiral bifunctional ligands based on a binaphthyl scaffold which incorporates both a phosphine and a carboxylic acid moiety. The optimal ligand provided high yields and enantioselectivities for a desymmetrizing C(sp²)-H arylation leading to 5,6-dihydrophenanthridines, whereas the corresponding monofunctional ligands showed low enantioselectivities. The bifunctional system proved applicable to a range of substituted dihydrophenanthridines, and allowed the parallel kinetic resolution of racemic substrates.

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 C7H6O3, Safety of (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

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

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

Murthy, Satya S. published the artcileA facile stereospecific synthesis of the [²H₆]-isopropyl-labeled metoprolol enantiomers from (2R)- and (2S)-glycidyl 3-nitrobenzenesulfonate, SDS of cas: 115314-17-5, the publication is Journal of Labelled Compounds and Radiopharmaceuticals (1990), 28(12), 1410-16, database is CAplus.

Enantiomers of metoprolol, e.g. I, containing six deuterium atoms in the iso-Pr Me groups were prepared in two steps from the sodium salt of 4-(2-methoxyethyl)phenol and the com. available (2R)- and (2S)-glycidyl 3-nitrobenzenesulfonate. The resulting (2R)- and (2S)-epoxides were opened using [²H₆]-isopropylamine. The enantiomeric excesses were 93 and 95% for the deuterated (2R)- and (2S)-enantiomers of metoprolol as determined by chiral column HPLC.

Journal of Labelled Compounds and Radiopharmaceuticals published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, SDS of cas: 115314-17-5.

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

Kawano, Tomikazu published the artcileSynthesis, reaction, and structure of chiral N-methyl-2-oxazolidinones from 3-ethoxy-6-(N-methyl-N-tert-butoxycarbonyl)amino-2,4-hexadienoates, Application of (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, the publication is Tetrahedron Letters (1997), 38(47), 8219-8222, database is CAplus.

N-methyl-2-oxazolidines I [(S)-CH₂Ph, (R)-CH₂Ph, (S)-CHMe₂, (R)-CHMe₂, H] and their enol Et ethers are obtained stereo- and regioselectively when Me₃CO₂CNMeCHRCH:CHC(OEt):CHCO₂Et are treated with concentrated sulfuric acid (1.0 equivalent) supported on silica gel in dichloromethane at 0° C.

Tetrahedron Letters published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C10H19NO3, Application of (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate.

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

Kawano, Tomikazu published the artcileSynthesis and reaction of chiral 4,5-disubstituted 2-oxazolidinones from 3-ethoxy-6-[alkyl(tert-butoxycarbonyl)amino]hexa-2,4-dienoates in the presence of concentrated sulfuric acid supported on silica gel, Related Products of esters-buliding-blocks, the publication is Heterocycles (2000), 52(3), 1261-1278, database is CAplus.

Reaction of chiral 3-ethoxy-6-[alkyl(tert-butoxycarbonyl)amino]hexa-2,4-dienoates and related compounds with 97% concentrated sulfuric acid supported on silica gel proceeded stereo- and regioselectively to yield chiral 4,5-disubstituted N-alkyl-2-oxazolidinones. The oxazolidinones were converted to N-alkyl-2-pyrrolylacetates and 2-oxazolidinone derivatives, which can serve as a chiral auxiliary.

Heterocycles published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C10H19NO3, Related Products of esters-buliding-blocks.

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

Priesner, Ernst published the artcileSpecificity of synthetic sex-attractants in Zygaena moths, COA of Formula: C14H26O2, the publication is Zeitschrift fuer Naturforschung, C: Journal of Biosciences (1984), 39C(7-8), 841-4, database is CAplus.

Species-specific sex-attractants are reported for western Palearctic Zygaena moths of the carniolica, viciae, filipendulae, and purpuralis species groups. The attractants were established by combined electrophysiol. and field behavioral studies and consist of ternary combinations of (Z)-7-dodecenyl acetate  [14959-86-5] with (Z)-9-tetradecenyl acetate  [16725-53-4] and a particular further (Z)-alkenyl acetate. Data on other Zygaenini taxa are included.

Zeitschrift fuer Naturforschung, C: Journal of Biosciences 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, COA of Formula: C14H26O2.

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

Jovanovic, Slobodan M. published the artcileInitiation of polymerization of methyl methacrylate by dithiocarbomate-based iniferters, Application of Benzyl diethylcarbamodithioate, the publication is Hemijska Industrija (2005), 59(11-12), 311-316, database is CAplus.

Twelve modified dithiocarbamates and a thiuram disulfide used for the initiation of Me methacrylate (MMA) polymerization were synthesized in this study. The polymerization of MMA was followed by determine the yield and molar mass of the obtained PMMA as a function of polymerization time. Four of the synthesized dithiocarbamates: S-benzyl-N,N-dibenzyldithiocarbamate, S-allyl-N,N-dibenzyldithiocarbamate, S-benzyl-N,N-diisobutyldithiocarbamate and S-benzoyl-N,N-diisobutyldithiocarbamate, as well as N,N,N’,N’-tetrabenzylthiuramdisulfide acted as iniferters. They were active as the initiators of the photo and/or thermally initiated radical polymerization of MMA in bulk and inert solvents (benzene and toluene). S-Benzyl-N,N-dibenzyldithiocarbamate can be successfully used for the initiation of MMA polymerization in a polar solvent such as dimethylacetamide.

Hemijska Industrija 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, Application of Benzyl diethylcarbamodithioate.

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

Moonprasith, Nantina published the artcileViscosity decrease by interfacial slippage between immiscible polymers, Recommanded Product: Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Polymer Engineering & Science (2021), 61(4), 1096-1103, database is CAplus.

The rheol. behavior under pressure-driven shear flow was studied using binary blends with a sea-island structure. The addition of a low-viscosity dispersion having a high interfacial tension with the continuous phase greatly reduces the shear viscosity, for example, the addition of atactic polystyrene (PS) with a low viscosity to isotactic polypropylene (PP) and the addition of PP with a low viscosity to PS. The interfacial slippage occurs because of the poor adhesive strength with the enlarged interfacial area and is responsible for the viscosity decrease. When the dispersion has a similar viscosity to the continuous phase, the viscosity decrease is barely detected. This is because the deformation of dispersed droplets is restricted, which creates a small interfacial area. The interfacial tension between the continuous and dispersed phases plays a crucial role on the shear viscosity. In the case of PP, the addition of linear low-d. polyethylene with a relatively low interfacial tension to PP has almost no impact on the shear viscosity. This is despite the polyethylene having a low viscosity.

Polymer Engineering & Science 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, Recommanded Product: Tris(2,4-di-tert-butylphenyl) phosphite.

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