Tag: M.W=100-150

Taniguchi, Ikuo published the artcilePiperazine-immobilized polymeric membranes for CO₂ capture: mechanism of preferential CO₂ permeation, HPLC of Formula: 622-40-2, the publication is Polymer Journal (Tokyo, Japan) (2021), 53(1), 129-136, database is CAplus.

Amines are incorporated into various membranes to improve their CO₂ separation performance. With amine-containing polymeric membranes, gas transport properties are often enhanced under humidity, where CO₂ migrates through the membranes in the form of bicarbonate ions. Piperazine (Pz) and its derivatives are known to catalyze the conversion of CO₂ to bicarbonate ions and have been used in liquid amine scrubbing technol. Piperazines were immobilized in poly(vinyl alc.) (PVA), and the resulting polymeric membranes showed high CO₂ separation performance over H₂ and CH₄. The gas transport properties were dependent on the chem. structure of the amines. In particular, 3-(1-piperazinyl)-1,2-propanediol (PzPD)-containing polymeric membranes gave excellent CO₂ separation performance, and the CO₂ permeability and CO₂ selectivity over CH₄ were 1060 Barrer and 370, resp., at 50°C and 90% relative humidity with a transmembrane CO₂ pressure of 11 kPa. The interaction between PzPD and CO₂ was quant. studied by inverse-gate decoupling ¹³C NMR spectroscopy. CO₂ interacted with the secondary amino group on the Pz ring to form a carbamate, which was readily hydrolyzed to produce bicarbonate ions. The hydroxyl group on the C2 carbon of PzPD facilitated the interaction between CO₂ and the amine through hydrogen bonding, resulting in enhanced diffusivity of CO₂ in the membranes.

Polymer Journal (Tokyo, Japan) published new progress about 622-40-2. 622-40-2 belongs to alcohols-buliding-blocks, auxiliary class Morpholine,Alcohol, name is 2-Morpholinoethanol, and the molecular formula is C9H10O3S, HPLC of Formula: 622-40-2.

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

Lang, Andreas published the artcileContribution to the chemistry of boron. Part 237. Bis(benzo-1,3,2-dioxaborolyl) oxide and 2-(2-hydroxyphenoxy)benzo-1,3,2-dioxaborole. Precursors for the synthesis of catecholborane (benzo-1,3,2-dioxaborole), Quality Control of 25240-59-9, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (1997), 623(6), 901-907, database is CAplus.

The title compounds were prepared from B(OH)₃ with catechol with different stoichiometries and were characterized by NMR and x-ray structure anal. Bis(benzo-1,3,2-dioxaborolyl) oxide (I) has C₂ point group symmetry with a wide B-O-B bond angle (135.9°) in contrast to 2-(2-hydroxyphenoxy)benzo-1,3,2-dioxaborole which shows an almost planar mol. structure. These mols. form infinite chains in the solid state. 2-Hydroxy-1,3,2-dioxaborole crystallizes as a OH…O bridged dimer. Compound I proved to be a good starting material for the preparation of catecholborane.

Zeitschrift fuer Anorganische und Allgemeine Chemie 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, Quality Control of 25240-59-9.

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

Ido, Yohei published the artcileA Reactor System Using Electrospray in the Liquid Phase and Its Application in Selective Cyclosiloxane Synthesis, Quality Control of 597-52-4, the publication is Industrial & Engineering Chemistry Research (2017), 56(16), 4878-4882, database is CAplus.

Electrospraying is an electrochem. technique in which fine droplets are generated in the balance of electrostatic repulsion and surface tension. In this paper, we applied electrospray in the liquid phase in a new reactor system in which pos. and neg. charged fine droplets collided with each other between two electrospray nozzles submerged in a solvent. When the hydrolysis of alkylchlorosilanes was carried out using this reactor, not only did the reaction rates increase, but also, the product distribution changed: the kinetically favored cyclotrimer was predominantly formed over the thermodynamically favored cyclotetramer. The yield of cyclotrimer increased with an increase in the voltage between the needles. Since the droplet size decreases with an increase in the applied voltage, the result suggests that the formed cyclotrimer could diffuse into the solvent before it was converted to the thermodynamically favored cyclotetramer.

Industrial & Engineering Chemistry Research published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Quality Control of 597-52-4.

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

Fuchise, Keita published the artcileOrganocatalytic ring-opening polymerization of cyclotrisiloxanes using silanols as initiators for the precise synthesis of asymmetric linear polysiloxanes, Synthetic Route of 597-52-4, the publication is Polymer Chemistry (2020), 11(48), 7625-7636, database is CAplus.

The organo-catalytic controlled/living ring-opening polymerization (ROP) of cyclotrisiloxanes such as hexamethylcyclotrisiloxane (D3) and 1,3,5-trimethyl-1,3,5-trivinylcyclotrisiloxane (V3) using silanol initiators and guanidine catalysts produced various asym. linear poly(dimethylsiloxane) (PDMS) and poly[methyl(vinyl)siloxane] (PMVS) compounds with controlled number-average molar mass (Mn), narrow molar-mass dispersity, and well-defined terminal structures. An extensive range of solvents and catalysts were tested in order to optimize the conditions for the ROP of D3 and V3 as well as to minimize undesired side-reactions, particularly the condensation of two Si-OH groups. 1,3-Trimethylene-2-n-propylguanidine (TMnPG) and 1,3-trimethylene-2-ethylguanidine (TMEG) were identified as the most appropriate catalysts for the ROP of D3 and V3. Asym. linear polysiloxanes that contain either a functional group on one terminus, i.e., hemi-telechelic polysiloxanes, or two different functional groups on each terminus, i.e., heterotelechelic polysiloxanes, were conveniently obtained from choosing a suitable combination of a functionalized silanol initiator and a functionalized chlorosilane end-capping agent. The controlled synthesis of a PDMS/PMVS diblock copolymer was also achieved by consecutive copolymerizations of D3 and V3. These polymerizations are considered to proceed via the initiator/chain-end activation mechanism, and intensive removal of water from the starting materials is necessary to control the polymerizations

Polymer Chemistry published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Synthetic Route of 597-52-4.

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

Hong, Ki Bum published the artcileCF₃-substituted mollugin 2-(4-morpholinyl)-ethyl ester as a potential anti-inflammatory agent with improved aqueous solubility and metabolic stability, Safety of 2-Morpholinoethanol, the publication is Molecules (2018), 23(8), 2030/1-2030/17, database is CAplus and MEDLINE.

Although mollugin, the main ingredient of the oriental medicinal herb Rubia cordifolia, has considerable anti-inflammatory effects, it has poor aqueous solubility as well as poor metabolic and plasma stability. To overcome these shortfalls, various mollugin derivatives have been synthesized and evaluated for their ability to inhibit U937 monocyte cell adhesion to HT-29 colonic epithelial cells in TNF-α or IL-6-induced models of colon inflammation. The 2-(4-morpholinyl)-Et ester of CF3-substituted mollugin (compound 15c) showed good water solubility, improved metabolic and plasma stability, and greater inhibitory activity than mesalazine in both the TNF-α and IL-6-induced colonic epithelial cell adhesion assays, suggesting that 15c is a potential anti-inflammatory agent.

Molecules published new progress about 622-40-2. 622-40-2 belongs to alcohols-buliding-blocks, auxiliary class Morpholine,Alcohol, name is 2-Morpholinoethanol, and the molecular formula is C6H13NO2, Safety of 2-Morpholinoethanol.

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

Kim, Han Ung published the artcileDirect conversion of lignin to high-quality biofuels by carbon dioxide-assisted hydrolysis combined with transfer hydrogenolysis over supported ruthenium catalysts, Formula: C9H12O, the publication is Energy Conversion and Management (2022), 115607, database is CAplus.

The central challenge in the biomass-to-fuel conversion process lies in the development of a catalytic strategy for the full utilization of each biomass component, to realize maximum carbon efficiency. In particular, the effective conversion of lignin into biomass is a major bottleneck because of its recalcitrant structure, necessitating the development of new catalytic reaction systems. Here, for the first time, a new hybrid reaction approach involving carbon dioxide-assisted hydrolysis and transfer hydrogenolysis using alcs. as hydrogen donors in a single reactor was investigated for the effective depolymerization of lignin. Specifically, the supercritical carbon dioxide-induced carbonic acid resulted in considerable acidity in the water/alc. reaction media, enhancing the hydrolytic depolymerization of solid lignin to soluble oligomers. The addition of supported metal catalysts (e.g., Ru/C) further depolymerized the oligomers to monomeric phenols through hydrogenolysis using the hydrogen produced in situ from alc. solvents. Systematic parameter studies on the carbon dioxide pressure, water/alc. mixing ratio, type of alc., catalyst addition, and temperature were performed to elucidate the synergistic role of carbon dioxide catalysis and transfer hydrogenolysis in lignin depolymerization Overall, for organosolv lignin, high biocrude oil and monomer yields of �75 and �21.4 wt%, resp., were successfully obtained at 300°C and 40 bar-carbon dioxide after 4 h using a water/ethanol cosolvent at a 25:75 ratio and Ru/C as a catalyst. The effectiveness of the combined carbon dioxide catalysis and transfer hydrogenolysis approach was further demonstrated in the direct depolymerization of lignin in raw biomass.

Energy Conversion and Management 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 C9H12O, Formula: C9H12O.

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

Koo, Jangwoo published the artcileHydrogenation of silyl formates: sustainable production of silanol and methanol from hydrosilane and carbon dioxide, Category: alcohols-buliding-blocks, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(39), 4995-4998, database is CAplus and MEDLINE.

A new process for simultaneously obtaining two chem. building blocks, MeOH and silanol, was realized starting from silyl formates which can be derived from silane and CO₂. Understanding the reaction mechanism enabled the authors to improve the reaction efficiency by the addition of a small amount of MeOH.

Chemical Communications (Cambridge, United Kingdom) published new progress about 597-52-4. 597-52-4 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic Chain, name is Triethylsilanol, and the molecular formula is C6H16OSi, Category: alcohols-buliding-blocks.

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

Hirayama, Ryoichi published the artcileThe autorecycling oxidation of benzylamine by synthetic 8-hydroxy-5-deazaflavin derivatives, SDS of cas: 14703-69-6, the publication is Journal of Heterocyclic Chemistry (1989), 26(5), 1255-9, database is CAplus.

8-Hydroxy-5-deazaflavin derivatives I [R = Me, Ph, R¹ = Me, Et, Bu, hexyl, octyl, dodecyl; R = Me, R¹ = (CH₂)_nCO₂H, n = 3, 5] were synthesized as model compounds of coenzyme F₄₂₀. I (R¹ = alkyl) oxidized PhCH₂NH₂ to PhCHO more efficiently than the 8-unsubstituted 5-deazaflavins. I [R¹ = (CH₂)_nCO₂H] showed little oxidizing ability.

Journal of Heterocyclic Chemistry published new progress about 14703-69-6. 14703-69-6 belongs to alcohols-buliding-blocks, auxiliary class Amine,Benzene,Phenol, name is 3-(Methylamino)phenol, and the molecular formula is C7H9NO, SDS of cas: 14703-69-6.

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

Bernhardt, Annika published the artcileThe Strong β-CF₃ Shielding Effect in Hexafluoroisopropanol and 100 Other Organic Solvents Revisited with ¹⁷O NMR Spectroscopy, Related Products of alcohols-buliding-blocks, the publication is ChemCatChem (2018), 10(7), 1547-1551, database is CAplus and MEDLINE.

An ¹⁷O NMR spectroscopy survey of more than 100 ubiquitous organic solvents and compounds, including some typical oxofluorinated solvents such as hexafluoroisopropanol, trifluoroethanol, trifluoroacetic acid, and others, is presented with D₂O as a reference A strong alternating α,β-CF₃-substituent chem. shift effect was thus observed This alternating deshielding-shielding effect is suspected to have a role in the exceptional properties of these oxofluorinated solvents, notably in oxidative cross-coupling reactions.

ChemCatChem published new progress about 2240-88-2. 2240-88-2 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol, name is 3,3,3-Trifluoropropan-1-ol, and the molecular formula is C3H5F3O, Related Products of alcohols-buliding-blocks.

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

Ali, Barkat published the artcileImpact of Soy-Cow’s mixed milk enzyme modified cheese on bread aroma, Synthetic Route of 111-29-5, the publication is LWT–Food Science and Technology (2022), 112793, database is CAplus.

The effect of spray-dried Soy-Cow’s mixed milk enzyme modified (SC-EM) cheese on wheat dough properties and bread aroma was evaluated at either 0.1, 0.5, 1.0, 1.5 or 2.0% (weight/weight). Significant accumulation of amino acids and peptides of dough were noted as SC-EM cheese levels increased. After baking a total of 118 volatile compounds (VCs) were identified in breads having aldehydes, alcs., esters and acids in major proportions. Higher contents of Maillard product 3-hydroxy-2-butanone, 2-methyl-1-propanol, phenylethyl alc., undecane, L-limonene, 2-pentyl furan and lipid oxidation compounds hexanoic acid Et ester, octanoic acid Et ester, decanoic acid Et ester, butanoic acid, hexanoic acid and octanoic acid were observed Isoamyl alc., lactic acid Et ester, Et sorbate and sorbic acid were the newly identified VCs. These results revealed that SC-EM cheese could be used as improver in dough and contribution to bread aroma. Thus, SC-EM cheese has been proposed to be included in fortified bakery products.

LWT–Food Science and Technology published new progress about 111-29-5. 111-29-5 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ploymers, name is Pentane-1,5-diol, and the molecular formula is C5H12O2, Synthetic Route of 111-29-5.

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