Month: December 2022

Dambatta, Mubarak B. published the artcileTransition metal free α-C-alkylation of ketones using secondary alcohols, Application In Synthesis of 584-02-1, the main research area is aryl ketone preparation; ketone secondary alc alkylation.

A base-mediated α-C-alkylation of aryl Me ketones with secondary alcs. was developed for the synthesis of aryl ketones ArC(O)CH2CH(R1)(R2) [R1 = Me, Et; R2 = Me, Et, Ph, etc.; R1R2 = (CH2)4, (CH2)5, (CH2)6, etc.; Ar = 2,4,6-(Me)3C6H2, 2,3,5,6-(Me)4C6H, 2,3,4,5,6-pentamethylphenyl, etc.]. This transition metal free approach employed KOt-Bu as the base and exhibited a broad scope, allowing a range of commodity aliphatic secondary alcs. Aryl Me ketones underwent selective mono-α-C-alkylation in high isolated yields (23 examples, 65% average yield).

Tetrahedron published new progress about Alkylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Application In Synthesis of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Howells, Rachel L. published the artcileSynthesis of Novel Pyrazine-Substituted-1H-Pyrrole-2-carboxamides and Related Tethered Heterocycles, Name: 2,2-Dimethoxyethanamine, the main research area is pyrazinyl pyrrole carboxamide preparation; fused bicyclic compound preparation.

The synthesis of a 4-(pyrazin-2-yl)-1H-pyrrole-2-carboxamide I and several fused bicyclic analogs, e.g., II all using standard procedures (SNAr, borylation, C-C cross couplings, hydrolysis, amide bond formation, cyclization, halogenation, and alkylation) from readily available starting materials is reported. The synthetic sequences range from 4-12 steps per final compound, with yields of isolated intermediates ranging from 20 to ∼100%.

Synthesis published new progress about Alkylation. 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Name: 2,2-Dimethoxyethanamine.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pandey, Bedraj published the artcileSelective Ketone Formations via Cobalt-Catalyzed β-Alkylation of Secondary Alcohols with Primary Alcohols, Product Details of C8H18O, the main research area is ketone preparation cobalt catalyst beta alkylation secondary primary alc.

A homogeneous cobalt-catalyzed β-alkylation of secondary alcs. with primary alcs. to selectively synthesize ketones via acceptorless dehydrogenative coupling is reported for the first time. Notably, this transformation is environmentally benign and atom economical with water and hydrogen gas as the only byproducts.

Organic Letters published new progress about Alkylation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Product Details of C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lu, Zeye published the artcileHighly efficient NHC-iridium-catalyzed β-methylation of alcohols with methanol at low catalyst loadings, Formula: C5H12O, the main research area is alc methanol iridium catalyst alkylation regioselective; alkyl alc preparation.

A highly efficient β-methylation of primary and secondary alcs. with methanol was achieved by using bis-N-heterocyclic carbene iridium (bis-NHC-Ir) complexes. Broad substrate scope and up to quant. yields were achieved at low catalyst loadings with only hydrogen and water as byproducts. The protocol was readily extended to the β-alkylation of alcs. with several primary alcs. Control experiments, along with DFT calculations and crystallog. studies, revealed that the ligand effect was critical to their excellent catalytic performance, shedded light on more challenging Guerbet reactions with simple alcs.

Science China: Chemistry published new progress about Alkylation. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Das, Kalicharan published the artcilePhosphine-Free Well-Defined Mn(I) Complex-Catalyzed Synthesis of Amine, Imine, and 2,3-Dihydro-1H-perimidine via Hydrogen Autotransfer or Acceptorless Dehydrogenative Coupling of Amine and Alcohol, SDS of cas: 111-87-5, the main research area is manganese catalyzed dehydrogenative coupling aryl amine benzyl alc; crystal structure thioalkylaminopyridyl manganese cation complex; mol structure thioalkylaminopyridyl manganese cation complex; perimidine benzo preparation; stilbene amino preparation; resveratrol derivative preparation.

The application of nontoxic, earth-abundant transition metals in place of costly noble metals is a paramount goal in catalysis and is especially interesting if the air- and moisture-stable ligand scaffold was used. Herein, the authors report the synthesis of amines/imines directly from alc. and amines via H autotransfer or acceptorless dehydrogenation catalyzed by well-defined phosphine-free Mn complexes. Both imines and amines can be obtained from the same set of alcs. and amines using the same catalyst, only by tuning the reaction conditions. The amount and nature of the base are a highly important aspect for the observed selectivity. Both the primary and secondary amines were employed as substrates for the N-alkylation reaction. As a highlight, the authors showed the chemoselective synthesis of resveratrol derivatives Also, the Mn-catalyzed dehydrogenative synthesis of structurally important 2,3-dihydro-1H-perimidines also was demonstrated. D. functional theory calculations were also carried out to model the reaction path and to calculate the reaction profile.

Organometallics published new progress about Alkylation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Schoettl, Sebastian published the artcileCombined molecular dynamics (MD) and small angle scattering (SAS) analysis of organization on a nanometer-scale in ternary solvent solutions containing a hydrotrope, COA of Formula: C8H18O, the main research area is mol dynamics small angle scattering nanometer scale hydrotrope; Detergentless microemulsion; Molecular dynamics; Pre-Ouzo; Small angle scattering; Surfactant-free microemulsion; Ternary mixtures; Ultraflexible microemulsion.

Mixtures of three solvents, with two immiscible liquids and a third one miscible to both – the solvotrope, may exhibit structuration. We explore the phase diagram of n-octanol/ethanol/water, where ethanol is the hydrotrope, varying composition from the water-rich side to the n-octanol-rich side at constant ethanol fraction. We resolve nanometer-sized structures exptl. by mean of four contrasts: three from Small Angle Neutron Scattering (SANS) and one from Small Angle X-ray Scattering (SAXS). On the water-rich side, we confirm the existence of droplets associated to a critical point stabilized by an excess adsorption of the hydrotrope: the ultra-flexible microemulsion (UFME) domain. The n-octanol-rich side is better described as a dynamic random network of chain-like associations of hydroxy groups. The continuous evolution from oil clusters to a dynamic network of hydroxy groups is demonstrated by the features of scattering patterns, successfully compared for all contrasts to Mol. Dynamics (MD) simulations, allowing to illustrate with snapshots the structuration of solvents. The free energy of transfer of the hydrotrope obtained from MD is low (∼1 kBT/mol.). This study suggests that Ouzo spontaneous emulsions may be in dynamic equilibrium with a pre-Ouzo, similarly to nanoemulsions kinetically stabilized by the co-existence of a microemulsion.

Journal of Colloid and Interface Science published new progress about Aggregates. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Yijia published the artcileColloidal Capsules Assembled from Gold Nanoparticles Using Small-Molecule Hydrophobic Cross-linkers, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is gold nanoparticle crosslinker colloidosome.

Colloidal capsules (or colloidosomes) have been studied for various applications such as therapeutic agent encapsulation, photothermal therapy, imaging, and energy storage. Emulsion-based synthesis is the most common approach for preparing colloidal capsules as it is relatively straightforward and scalable. However, while the initial formation requires only introducing the colloidal subunits into an emulsion and letting them assemble at the interface, a second step is required in order to prepare stable, covalently linked colloidal capsules, and preparing submicron colloidal capsules is quite challenging. Here, we describe a simple and quick one-step method to synthesize covalently linked, stable nanoscale colloidal capsules consisting of gold nanoparticles (NPs) (AuNP) and thiol-containing cross-linkers. Gold nanoparticle capsules (AuNCs) were formed by coating emulsion droplets containing thiol-containing cross-linkers with citrate-stabilized AuNPs. The physicochem. properties of the colloidal capsules can be tailored by changing the building blocks. In order to demonstrate this, colloidal capsules were assembled from AuNPs ranging from 5 to 20 nm in size. The use of the larger 20 nm starting particles resulted in AuNCs with a sufficiently pronounced red shift for λmax to be suitable for biol. photothermal applications, where use of a near-IR laser is strongly preferred. The AuNCs were found to be biocompatible and stable in cell culture conditions and to provide moderate heating. This demonstrates the modularity of the synthesis and the potential advantages of a one-step synthesis to prepare nanoscale gold colloidal capsules.

Langmuir published new progress about Aggregates. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Xiangkai published the artcileLuminescent Hydrogel Based on Silver Nanocluster/Malic Acid and Its Composite Film for Highly Sensitive Detection of Fe3+, Recommanded Product: (S)-2-hydroxysuccinic acid, the main research area is silver nanocluster malic acid polymethylmethacrylate hydrogel aggregation fluorescence quenching; AIE; malic acid; self-assembly; sensor; silver nanoclusters.

Metal nanoclusters (NCs) with excellent photoluminescence properties are an emerging functional material that have rich phys. and chem. properties and broad application prospects. However, it is a challenging problem to construct such materials into complex ordered aggregates and cause aggregation-induced emission (AIE). In this article, we use the supramol. self-assembly strategy to regulate a water-soluble, atomically precise Ag NCs (NH4)9[Ag9(C7H4SO2)9] (Ag9-NCs, [Ag9(mba)9], H2mba = 2-mercaptobenzoic acid) and L-malic acid (L-MA) to form a phosphorescent hydrogel with stable and bright luminescence, which is ascribed to AIE phenomenon. In this process, the AIE of Ag9-NCs could be attributed to the non-covalent interactions between L-MA and Ag9-NCs, which restrict the intramol. vibration and rotation of ligands on the periphery of Ag9-NCs, thus inhibiting the ligand-related, non-radiative excited state relaxation and promoting radiation energy transfer. In addition, the fluorescent Ag9-NCs/L-MA xerogel was introduced into polymethylmethacrylate (PMMA) to form an excellently fluorescent film for sensing of Fe3+. Ag9-NCs/L-MA/PMMA film exhibits an excellent ability to recognize Fe3+ ion with high selectivity and a low detection limit of 0.3 μM. This research enriches self-assembly system for enhancing the AIE of metal NCs, and the prepared hybrid films will become good candidates for optical materials.

Gels published new progress about Aggregates. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Recommanded Product: (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Swami, K. Rama published the artcileUnraveling the role of phase modifiers in the extraction of Nd(III) from nitric acid medium in tetra-bis(2-ethylhexyl)diglycolamide in n-dodecane containing long chain aliphatic alcohols, SDS of cas: 111-87-5, the main research area is neodymium extraction nitric acid TEHDGA dodecane alc phase modifier.

Tetra-bis(2-ethylhexyl)diglycolamide (TEHDGA) alone in n-dodecane (n-DD) is unsuitable for the solvent extraction of trivalent actinides from high-level liquid waste due to the occurrence of third phase formation during the course of solvent extraction Significant concentration of long chain aliphatic alcs. ranging from 5% to 15% (V/V) have been added to the solvent phase, TEHDGA/n-DD, to control the undesirable third phase formation. The alcs. investigated were n-octanol, n-decanol, and isodecanol. To understand the role of alcs. in controlling the third phase formation, the extraction behavior of the trivalent metal ion, Nd(III), from nitric acid medium was studied in a solution of 0.2 M TEHDGA + 1 M alc. in n-DD. The equilibrium concentration of Nd(III) and nitric acid present in organic and aqueous phases were determined The organic phase obtained after extraction was subjected to dynamic light scattering studies to unravel the role of alc. phase modifiers in organic phase. The aggregate size and their distribution in organic phase was determined as a function of various parameters such as concentrations of nitric acid, Nd(NO3)3 and the nature of alc. In view of this, the aggregate size was controlled much below the limiting aggregate size required for third phase formation by these alc. phase modifiers. Even though all the alcs. investigated in the present study could bring down the aggregate size much below the limiting value, n-decanol was found to be superior to other alcs.

Journal of Molecular Liquids published new progress about Aggregates. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Vervald, Alexey published the artcileDifference in deprotonation for oxygen-containing groups on sp2 and sp3 carbons, Synthetic Route of 584-02-1, the main research area is phenol benzoic acid nanodiamond deprotonation zeta potential.

Does the hybridization of the surface of carbon nanoparticles (CNPs) affect the properties of the surface carboxyl and hydroxyl groups and the features of their deprotonation in water. To answer these questions in this work the structures of graphite-and diamond-like carbon cells with OH and COOH groups optimized by the DFT method were studied. It was found that in the same suspensions the OH and COOH groups deprotonate easier being on carbon with sp2 hybridization rather than sp3. Theor. estimates have shown that in aqueous suspensions of CNPs, “”isolated”” carboxyl COOH groups on sp2/sp3 hybridized carbon sites have pKa in the ranges of 3.5-4.5/4.5-5, and the hydroxyl OH groups – in the ranges of 8.5-10/15-18, resp. The conclusions made on the basis of theor. calculations about the features of deprotonation of surface groups of CNPs are exptl. confirmed by the changes of the zeta-potentials of oxidized detonation nanodiamonds with the change of the pH of the environment.

Fullerenes, Nanotubes, and Carbon Nanostructures published new progress about Aggregates. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Synthetic Route of 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts