Month: December 2022

Gestwicki, Jason E. published the artcileInfluencing Receptor-Ligand Binding Mechanisms with Multivalent Ligand Architecture, Synthetic Route of 96345-79-8, the publication is Journal of the American Chemical Society (2002), 124(50), 14922-14933, database is CAplus and MEDLINE.

Multivalent ligands can function as inhibitors or effectors of biol. processes. Potent inhibitory activity can arise from the high functional affinities of multivalent ligand-receptor interactions. Effector functions, however, are influenced not only by apparent affinities but also by alternate factors, including the ability of a ligand to cluster receptors. Little is known about the mol. features of a multivalent ligand that determine whether it will function as an inhibitor or effector. We envisioned that, by altering multivalent ligand architecture, ligands with preferences for different binding mechanisms would be generated. To this end, a series of 28 ligands possessing structural diversity was synthesized. This series provides the means to explore the effects of ligand architecture on the inhibition and clustering of a model protein, the lectin Con A (Con A). The structural parameters that were varied include scaffold shape, size, valency, and d. of binding elements. We found that ligands with certain architectures are effective inhibitors, but others mediate receptor clustering. Specifically, high mol. weight, polydisperse polyvalent ligands are effective inhibitors of Con A binding, whereas linear oligomeric ligands generated by the ring-opening metathesis polymerization have structural properties that favor clustering. The shape of a multivalent ligand also influences specific aspects of receptor clustering. These include the rate at which the receptor is clustered, the number of receptors in the clusters, and the average inter-receptor distance. Our results indicate that the architecture of a multivalent ligand is a key parameter in determining its activity as an inhibitor or effector. Diversity-oriented syntheses of multivalent ligands coupled with effective assays that can be used to compare the contributions of different binding parameters may afford ligands that function by specific mechanisms.

Journal of the American Chemical Society published new progress about 96345-79-8. 96345-79-8 belongs to alcohols-buliding-blocks, auxiliary class Sugar Units,Gal and Man, name is (2R,3S,4S,5S,6R)-2-(Hydroxymethyl)-6-(4-isothiocyanatophenoxy)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C13H15NO6S, Synthetic Route of 96345-79-8.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Barton, Benita published the artcileSynthesis of N,N’-bis(9-phenylxanthen-9-yl)ethylenediamine and an investigation of its host-guest inclusion potential, SDS of cas: 596-38-3, the publication is Perkin 2 (2000), 865-869, database is CAplus.

The novel amine, N,N’-bis(9-phenylxanthen-9-yl)ethylenediamine (I), was synthesized by treating 9-phenylxanthen-9-ylium perchlorate with ethylenediamine. Its host potential was assessed by allowing it to crystallize from a range of organic solvents (single and binary mixtures), of which several were found to be included. The stoichiometries of these host-guest complexes were determined through ¹H-NMR anal. and their stabilities assessed through thermal anal. Single crystal x-ray crystallog. was used to elucidate the crystal structure of the 1:1 I·THF inclusion complex. It was found that only one of the two amine moieties of the host functions as a donor, forming a nearly linear hydrogen bond to the oxygen atom of the guest mol. Each THF mol. is effectively surrounded by host mols. so that the THF mols. are found to occupy discrete “cavities” within the host lattice. The activation energy associated with desolvation of the I·THF complex was determined through thermal anal. and was found to decrease as desolvation progressed.

Perkin 2 published new progress about 596-38-3. 596-38-3 belongs to alcohols-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Benzene,Alcohol, name is 9-Phenyl-9H-xanthen-9-ol, and the molecular formula is C19H14O2, SDS of cas: 596-38-3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Zhang, Yue published the artcileDiphenyl Diselenide-Catalyzed Synthesis of Triaryl Phosphites and Triaryl Phosphates from White Phosphorus, Application of 4-Propylphenol, the publication is Organic Letters (2021), 23(13), 5158-5163, database is CAplus and MEDLINE.

Industrially important triaryl phosphites, traditionally prepared from PCl₃, have been synthesized by a di-Ph diselenide-catalyzed one-step procedure involving white phosphorus and phenols, which provides a halogen- and transition metal-free way to these compounds Subsequent oxidation of triaryl phosphites produces triaryl phosphates and triaryl thiophosphates. Phosphorotrithioates are also prepared efficiently from aromatic thiols and aliphatic thiols.

Organic Letters published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C11H9NO3, Application of 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Jiang, Kang published the artcileExploring functionalized polythiophene derivatives based on thiophene-linker-thiophene platform, analysis of prototype monomer crystal for C-Br/C-H bulk polycondensation and its application for acid detection, Name: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, the publication is Polymer (2019), 70-76, database is CAplus.

Ten thiophene derivatives monomers were designed based on thiophene-linker-thiophene platform and were subjected to C-Br/C-H bulk polycondensation. All of them were converted to corresponding polythiophene derivatives smoothly, indicating that up to three-building-blocks of thiophene monomers can be successfully constructed. Detailed characterizations of the obtained polymers were carried out by regular measurements, including Cyclic Voltammetry (CV), IR spectrum (IR), UV-Vis absorbance spectroscopy, TGA and so on. In addition, the obtained poly{phenyl-bis-(4-thiophen-2-yl-phenyl)-amine} was employed as acid sensor and the results showed that HNO₃ acid could be recognized and distinguished successfully. Furthermore, a prototype monomer crystal of 2-bromo-3-(9,9-dimethyl-9H-fluoren-2-yl)-thiophene is obtained and its effective reaction points distance (4.197 Å) is longer (37.6%) than the van der Waals radius (rw) of reaction points (sum of rw of bromine and hydrogen atoms 3.05 Å).

Polymer published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Name: 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Raus, Vladimir published the artcileATRP of POSS Monomers Revisited: Toward High-Molecular Weight Methacrylate-POSS (Co)Polymers, Related Products of alcohols-buliding-blocks, the publication is Macromolecules (Washington, DC, United States) (2014), 47(21), 7311-7320, database is CAplus.

For the first time, ATRP was successfully employed for homopolymerization of a com. methacrylate-functionalized polyhedral oligomeric silsesquioxane (POSS) monomer, iBuPOSSMA, to high mol. weights It was found that iBuPOSSMA has a low ceiling temperature (T_c); therefore, low temperatures and/or high initial monomer concentrations need to be used in order to avoid low ds.p. that had been observed previously. The values of T_c, as well as of the polymerization enthalpy ΔH_p and entropy ΔS_p were determined to be 130° (at [M]₀ = 1 M), -41 kJ mol^-1, and -101 J mol^-1 K^-1, resp. Under optimized conditions, poly(iBuPOSSMA) homopolymers having low dispersity and high M_n, ranging from 23 000 to 460 000, were obtained in a well-controlled ATRP process. Moreover, various block copolymers having high-M_n poly(iBuPOSSMA) blocks were prepared by copolymerization of iBuPOSSMA with Me methacrylate and styrene.

Macromolecules (Washington, DC, United States) published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Related Products of alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Al Sulaiman, Dana published the artcileChemically Modified Hydrogel-Filled Nanopores: A Tunable Platform for Single-Molecule Sensing, Application In Synthesis of 6346-09-4, the publication is Nano Letters (2018), 18(9), 6084-6093, database is CAplus and MEDLINE.

Label-free, single-mol. sensing is an ideal candidate for biomedical applications that rely on the detection of low copy numbers in small volumes and potentially complex biofluids. Among them, solid-state nanopores can be engineered to detect single mols. of charged analytes when they are elec. driven through the nanometer-sized aperture. When successfully applied to nucleic acid sensing, fast transport in the range of 10-100 nucleotides per ns often precludes the use of standard nanopores for the detection of the smallest fragments. Herein, hydrogel-filled nanopores (HFN) are reported that combine quartz nanopipettes with biocompatible chem. poly(vinyl) alc. hydrogels engineered inhouse. Hydrogels were modified phys. or chem. to finely tune, in a predictable manner, the transport of specific mols. Controlling the hydrogel mesh size and chem. composition allowed us to slow DNA transport by 4 orders of magnitude and to detect fragments as small as 100 base pairs (bp) with nanopores larger than 20 nm at an ionic strength comparable to physiol. conditions. Considering the emergence of cell-free nucleic acids as blood biomarkers for cancer diagnostics or prenatal testing, the successful sensing and size profiling of DNA fragments ranging from 100 bp to >1 kbp long under physiol. conditions demonstrates the potential of HFNs as a new generation of powerful and easily tunable mol. diagnostics tools.

Nano Letters published new progress about 6346-09-4. 6346-09-4 belongs to alcohols-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Ether, name is 4,4-Diethoxybutan-1-amine, and the molecular formula is C8H19NO2, Application In Synthesis of 6346-09-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Leal-Duaso, A. published the artcileSynthesis of 3-alkoxypropan-1,2-diols from glycidol: experimental and theoretical studies for the optimization of the synthesis of glycerol derived solvents, Recommanded Product: 3-((2-Ethylhexyl)oxy)propane-1,2-diol, the publication is Green Chemistry (2017), 19(17), 4176-4185, database is CAplus.

A straightforward and green synthetic methodol. was derived for the synthesis of glycerol monoethers ROCH₂CH(OH)CH₂OH [R = Me, Et, i-Pr, etc.] from glycidol and alcs. Several homogeneous and heterogeneous basic catalysts were tested, the best results being obtained with readily available and inexpensive alk. metal hydroxides. In the best case, good yield of the desired monoether was obtained under smooth reaction conditions always with total conversion of glycidol. The selectivity of the reactions mainly depended on the alc. used, due to the concurrence of undesired side reactions. A mechanistic study carried out through computational DFT calculations, in which solvent effects were taken into account, also complemented the experiments and allowed to identify the main reaction paths taking place under reaction conditions, giving insights into the main causes affecting the reaction selectivity and also into how it could be improved.

Green Chemistry published new progress about 70445-33-9. 70445-33-9 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is 3-((2-Ethylhexyl)oxy)propane-1,2-diol, and the molecular formula is C11H24O3, Recommanded Product: 3-((2-Ethylhexyl)oxy)propane-1,2-diol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Gonzalez-Ramirez, Luis A. published the artcileInvestigation of the Compatibility of Gels with Precipitating Agents and Detergents in Protein Crystallization Experiments, Application of (2R,3S,4S,5R,6S)-2-(Hydroxymethyl)-6-(octylthio)tetrahydro-2H-pyran-3,4,5-triol, the publication is Crystal Growth & Design (2008), 8(12), 4291-4296, database is CAplus.

Different types of gels are currently used as crystallization media avoiding convective fluid motion and sedimentation of crystals, two properties that are beneficial when seeking crystals of the highest quality for structural studies. The authors show in this paper the compatibility of the main precipitating agents, buffers, and additives, including some detergents employed in protein crystallization with certain gels, namely, agaroses with two different gelling temperatures, polyacrylamide and silica gels such as tetramethylorthosilicate.

Crystal Growth & Design published new progress about 85618-21-9. 85618-21-9 belongs to alcohols-buliding-blocks, auxiliary class Tetrahydropyran,Chiral,sulfides,Alcohol, name is (2R,3S,4S,5R,6S)-2-(Hydroxymethyl)-6-(octylthio)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C14H28O5S, Application of (2R,3S,4S,5R,6S)-2-(Hydroxymethyl)-6-(octylthio)tetrahydro-2H-pyran-3,4,5-triol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Anaby, Aviel published the artcileB-H Bond Cleavage via Metal-Ligand Cooperation by Dearomatized Ruthenium Pincer Complexes, COA of Formula: C6H13BO3, the publication is Organometallics (2014), 33(14), 3716-3726, database is CAplus.

Organic derivatives of boronic acid are widely used reagents useful in various synthetic applications. A fundamental understanding and the exploration of new reaction pathways of boronic reagents with organometallic systems hold promise for useful advancement in chem. catalysis. Herein the authors present the reactions of simple boranes with dearomatized Ru pincer complexes based on PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) or PNN (2-(di-tert-butylphosphinomethyl)-6-(diethylaminomethyl)pyridine) ligands. NMR studies revealed dehydrogenative addition of the borane B-H bond across the metal center and the ligand. Remarkably, new complexes were observed, which contain the boryl moiety at the benzylic C of the pincer ligand arm. X-ray crystal structures of new dearomatized boryl pincer complexes were obtained, and DFT calculations revealed mechanistic details of the adduct formation process through a dehydrogenative pathway. Catalytic aryl-boron coupling reactions were explored. The new boryl pincer systems may possibly be useful in future post-modification techniques for Ru pincer complexes, as well as in catalytic B-B and B-C coupling reactions.

Organometallics published new progress about 25240-59-9. 25240-59-9 belongs to alcohols-buliding-blocks, auxiliary class Boronic acid and ester,Boronic Acids,Boronate Esters, name is 4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-ol, and the molecular formula is C6H13BO3, COA of Formula: C6H13BO3.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Sapleva, V. T. published the artcileDetermination of naphthamon using rhodamine 6G, Recommanded Product: N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate, the publication is Farmatsiya (Moscow, Russian Federation) (1974), 23(1), 39-42, database is CAplus and MEDLINE.

The reaction of naphthamon (2-phenoxyethyldimethylbenzylammonium β-hydroxynaphthoate) (I) with rhodamine 6G was used for the quant. determination of I. The resulting complex compound was extracted with benzene and the optical d. of the extract was determined at 512 nm. The relative error of the determination is ±2.2%.

Farmatsiya (Moscow, Russian Federation) published new progress about 3818-50-6. 3818-50-6 belongs to alcohols-buliding-blocks, auxiliary class Anti-infection,Antiparasitic, name is N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate, and the molecular formula is C28H29NO4, Recommanded Product: N-Benzyl-N,N-dimethyl-2-phenoxyethanaminium 3-hydroxy-2-naphthoate.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts