Month: October 2022

Shi, Quan-Xi; Li, Qian; Xiao, Hang; Sun, Xiao-Li; Bao, Hongli; Wan, Wen-Ming published the artcile< Room-temperature Barbier single-atom polymerization induced emission as versatile approach for utilization of monofunctional carboxylic acid resources>, Computed Properties of 76-84-6, the main research area is phenylcarboxylic acid dibenzoyl peroxide polytriphenylmethanol Barbier single atom polymerization.

Carboxylic acids are widely available from both biomass and fossil sources on the Earth. In comparison with multifunctional carboxylic acid containing chems. that have been comprehensively used as building blocks of polymer materials, monofunctional carboxylic acid resources exhibit broader availability but are rarely utilized as monomers for polymerization, attributed to their monofunctionality. Here, we demonstrate a Barbier single-atom polymerization (SAP) as a versatile approach for the utilization of monofunctional carboxylic acid resources, where they act as a carbon source to contribute only one carbon atom for the construction of the polymer main chain. The key point for the polymerization of the monofunctional carboxylic acid resource is to difunctionalize it, which is realized through two Barbier additions between bifunctional aromatic halides and monofunctional peroxyester in the presence of Mg. Prior to the Barbier SAP, monofunctional phenylcarboxylic acid is converted into dibenzoyl peroxide (BPO) with higher reactivity. Through the Barbier SAP of BPO at room temperature, a series of nonconjugated polytriphenylmethanols (PTPMs) were prepared as polymerization-induced emission luminogens (PIEgens) with structure-specific nonconjugated luminescence including aggregation-caused quenching (ACQ) and aggregation induced emission (AIE) characteristics, where starting monomers and repeating units are nonemissive. Further applications of PIEgens were carried out for an artificial light-harvesting system with an antenna effect of over 18.5 and explosive detection at the ppm level in solution and ng level on test paper. This work therefore opens a new avenue for the design of nonconjugated luminescence by utilizing Earth’s monofunctional carboxylic acid resources sufficiently.

Polymer Chemistry published new progress about Aggregation-induced emission. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Computed Properties of 76-84-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Yunqin; Xiang, Guisheng; He, Shaojun; Hu, Yikao; Liu, Yanjun; Xu, Lili; Xiao, Guozhi published the artcile< Orthogonal One-Pot Synthesis of Oligosaccharides Based on Glycosyl ortho-Alkynylbenzoates>, Product Details of C12H20O6, the main research area is glycosylation oligosaccharide synthesis alkynylbenzoate.

One of the most popular one-pot glycosylation strategies is orthogonal one-pot synthesis, which was mainly based on thioglycosides. Despite its successful application, shortcomings of thioglycosides including aglycon transfers, interference of departing species and unpleasant odor restrict its application scope. Herein, we report a new and efficient orthogonal one-pot synthesis of oligosaccharides based on glycosyl ortho-alkynylbenzoate, which solves the issues of thioglycoside-based orthogonal one-pot synthesis. Over a dozen of oligosaccharides have been efficiently synthesized by this method.

Organic Letters published new progress about Glycosides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 4064-06-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C12H20O6, Product Details of C12H20O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Okuda, Yuta; Nagaoka, Masahiro; Yamamoto, Tetsuya published the artcile< Bulky N-Heterocyclic-Carbene-Coordinated Palladium Catalysts for 1,2-Addition of Arylboron Compounds to Carbonyl Compounds>, Safety of Triphenylmethanol, the main research area is nitrogen heterocyclic carbene pentanylaniline cyclometallated palladium complex preparation catalyst; primary secondary tertiary alc preparation; arylboronic acid boronate aldehyde ketone addition.

The synthesis of primary, secondary, and tertiary alcs. by the 1,2-addition of arylboronic acids or boronates to carbonyl compounds, including unactivated ketones, using novel bulky yet flexible N-heterocyclic carbene (NHC)-coordinated 2,6-di(pentan-3-yl)aniline (IPent)-based cyclometallated palladium complexes (CYPs) as catalysts is reported. The PhS-IPent-CYP-catalyzed reactions are efficient at low catalyst loadings (0.02-0.3 mol% Pd), and the exceptional catalytic activity for 1,2-addition is attributed to the steric bulk of the NHC ligand. These reactions can yield a wide range of functionalized benzylic alcs. that are difficult to synthesize by classical protocols using highly active organomagnesium or lithium reagents.

ChemCatChem published new progress about 1,2-Addition reaction. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Safety of Triphenylmethanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Dowson, George R. M.; Cooper, Joshua; Styring, Peter published the artcile< Reactive capture using metal looping: the effect of oxygen>, Application In Synthesis of 76-84-6, the main research area is oxygen Grignard reagent reactive capture metal looping flue gas.

In the effort to create a sustainable future economy, the ability to directly convert dilute gas-phase CO2 in waste gas streams into useful products would be a valuable tool, which may be achievable using Grignard reagents as both the capture and the conversion materials. The magnesium salt byproduct can be recovered, and metallic magnesium regenerated through conventional high-efficiency electrolysis. This stoichiometric approach is known as metal looping, where the magnesium acts as the energy vector for the capture and conversion, allowing both to occur at room temperature and atm. pressure. However, the process has only previously been demonstrated with 12% CO2 in nitrogen mixtures If we consider this process in a real post-combustion flue gas conversion scenario, the sensitivity of Grignard reagents to other gases (and water vapor) must be considered. While some of these gases and the water vapor are relatively easily removed, in most flue gas streams the most common other gas present, oxygen, would be far more challenging to excise, and oxygen is known to react with Grignard reagents, albeit slowly. In order to determine if higher oxygen concentrations could be tolerated, allowing the possibility of a variety of relatively inexpensive and possibly profitable direct CO2 conversion pathways to be developed, a range of industrially relevant CO2/O2 mixtures were made and carefully bubbled through phenylmagnesium bromide solutions

Faraday Discussions published new progress about Decomposition. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Application In Synthesis of 76-84-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ghosh, Soumen; Herink, Georg; Perri, Antonio; Preda, Fabrizio; Manzoni, Cristian; Polli, Dario; Cerullo, Giulio published the artcile< Broadband Optical Activity Spectroscopy with Interferometric Fourier-Transform Balanced Detection>, Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol, the main research area is broadband optical activity spectroscopy interferometric fourier transform balanced detection.

Spectrally resolved measurements of optical activity, such as CD (CD) and ORD (ORD), are powerful tools to study chiroptical properties of (bio)mol. and nanoplasmonic systems. The wider utilization of these techniques, however, has been impeded by the bulky and slow design of conventional spectropolarimeters, which have been limited to a narrowband scanning approach for more than 50 years. In this work, we demonstrate broadband measurements of optical activity by combining a balanced detection scheme with interferometric Fourier-transform spectroscopy. The setup utilizes a linearly polarized light field that creates an orthogonally polarized weak chiral free-induction-decay field, along with a phase-locked achiral transmitted signal, which serves as the local oscillator for heterodyne amplification. By scanning the delay between the two fields with a birefringent common-path interferometer and recording their interferogram with a balanced detector that measures polarization rotation, broadband CD and ORD spectra are retrieved simultaneously with a Fourier transform. Using an incoherent thermal light source, we achieve state-of-the-art sensitivity for CD and ORD across a broad wavelength range in a remarkably simple setup. We further demonstrate the potential of our technique for highly sensitive measurements of glucose concentration and the real-time monitoring of ground-state chem. reactions. The setup also accepts broadband pulses and will be suitable for broadband transient optical activity spectroscopy and broadband optical activity imaging.

ACS Photonics published new progress about Birefringence. 492-62-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Meng-Qi; Ma, Wan-Jun; Shi, Jiang; Zhu, Yin; Lin, Zhi; Lv, Hai-Peng published the artcile< Characterization of the key aroma compounds in Longjing tea using stir bar sorptive extraction (SBSE) combined with gas chromatography-mass spectrometry (GC-MS), gas chromatography-olfactometry (GC-O), odor activity value (OAV), and aroma recombination>, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol, the main research area is aroma compound tea SBSE GCMS GCO OAV; 1-Octen-3-ol (PubChem, CID: 18827); 2-Methyl butanal (PubChem, CID: 7284); Aromatic compounds; Benzaldehyde (PubChem, CID: 240); Benzeneacetaldehyde (PubChem, CID: 998); Concentration; Geraniol (PubChem, CID: 637566), β-Ionone(PubChem, CID: 638014).; Green tea; Heptanal (PubChem, CID: 8130); Identification; Key odorants; Linalool (PubChem, CID: 6549); Methyl salicylate (PubChem, CID: 4133); Nonanal (PubChem, CID: 31289); Volatile composition.

Longjing tea is the most famous premium green tea, and is regarded as the national tea in China, with its attractive aroma contributing as a prime factor for its general acceptability; however, its key aroma compounds are essentially unknown. In the present study, volatile compounds from Longjing tea were extracted and examined using stir bar sorptive extraction (SBSE) combined with gas chromatog.-mass spectrometry (GC-MS). Data obtained from the present study revealed that 151 volatile compounds from 16 different chem. classes were identified by GC-MS anal. Enols (8096 μg/kg), alkanes (6744 μg/kg), aldehydes (6442 μg/kg), and esters (6161 μg/kg) were the four major chem. classes and accounted for 54% of the total content of volatile compounds Geraniol (6736 μg/kg) was the most abundant volatile compound in Longjing tea, followed by hexanal (1876 μg/kg) and β-ionone (1837 μg/kg). Moreover, 14 volatile compounds were distinguished as the key aroma compounds of Longjing tea based on gas chromatog.-olfactometry (GC-O) anal., odor activity value (OAV) calculations, and a preliminary aroma recombination experiment, including 2-Me butyraldehyde, DMSO, heptanal, benzaldehyde, 1-octen-3-ol, (E, E)-2,4-heptadienal, benzeneacetaldehyde, linalool oxide I, (E, E)-3,5-octadien-2-one, linalool, nonanal, Me salicylate, geraniol, and β-ionone. This is the first comprehensive report describing the aroma characterizations and the key aroma compounds in Longjing tea using SBSE/GC-MS. The findings from this study contribute to the scientific elucidation of the chem. basis for the aromatic qualities of Longjing tea.

Food Research International published new progress about Gas chromatography-mass spectrometry. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hoong, Seng Soi; Arniza, Mohd. Zan; Mariam, Nek Mat Din Nik Siti; Armylisas, Abu Hassan Noor; Yeong, Shoot Kian published the artcile< Synthesis and physicochemical properties of novel lauric acid capped estolide esters and amides made from oleic acid and their evaluations for biolubricant basestock>, Application In Synthesis of 104-76-7, the main research area is oleic lauric acid estolide ester amide biolubricant oxidative stability.

Vegetable oils have been used as environmentally friendly biolubricants because of their inherent biodegradability, good lubricity, higher viscosity index and low evaporative loss. However, their use is limited due to significantly poor cold flow properties and inferior oxidative stability. This paper presents an approach to modify vegetable oil derivatives namely oleic acid to yield biolubricant with good cold flow properties and oxidation stability. Oleic acid was converted to polyhydroxy estolide through reaction with only hydrogen peroxide, which is considered a ‘green’ oxidant. The synthesized polyhydroxy estolide was further reacted with appropriate amount of lauric acid to end-cap its hydroxy groups, which yielded lauric acid capped estolide as the product. Subsequently, the prepared lauric acid capped estolide was reacted with branched and straight chain alcs. as well as secondary amines to afford estolide esters and amides. In general, most of the prepared samples showed improved cold flow properties as compared to vegetable oil-based lubricants, where the best pour point (-41°C) was achieved by 4-methyl-2-pentyl estolide ester. Meanwhile, estolide amides exhibited the best oxidative stability among samples evaluated with an oxidation onset temperature of 205°C, which is significantly higher than vegetable oil-based lubricants. Generally, the oxidative stability, viscosity index and anti-wear properties of prepared estolide esters and amides were found to be comparable to the properties of com. samples used as benchmark.

Industrial Crops and Products published new progress about Acid number. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Application In Synthesis of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Murgia, Denise; Mauceri, Rodolfo; Campisi, Giuseppina; De Caro, Viviana published the artcile< Advance on resveratrol application in bone regeneration: progress and perspectives for use in oral and maxillofacial surgery>, Reference of 501-36-0, the main research area is review resveratrol chronic bone regeneration surgery; Resveratrol; alveolar bone loss; bone defect; bone-regeneration; craniofacial tissue; resveratrol scaffold.

A review of the natural polyphenol Resveratrol (RSV) claims numerous pos. effects on health due to the well documented biol. effects demonstrating its potential as a disease-preventing agent and as adjuvant for treatment of a wide variety of chronic diseases. Since several studies, both in vitro and in vivo, have highlighted the protective bone aptitude of RSV both as promoter of osteoblasts’ proliferation and antagonist of osteoclasts’ differentiation, they could be interesting in view of applications in the field of dentistry and maxillofacial surgery. This review has brought together exptl. findings on the use of RSV in the regeneration of bone tissue comprising also its application associated with scaffolds and non-transfusional hemocomponents.

Biomolecules published new progress about Bone. 501-36-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H12O3, Reference of 501-36-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jia, Wei; Hu, ChengXiao; Xu, JiaYang; Ming, JiaJia; Zhao, YuanYuan; Cai, MiaoMiao; Sun, XueCheng; Liu, XinWei; Zhao, XiaoHu published the artcile< Dissolved organic matter derived from rape straw pretreated with selenium in soil improves the inhibition of Sclerotinia sclerotiorum growth>, Electric Literature of 87-73-0, the main research area is DOM rape straw selenium soil Sclerotinia; Dissolved organic matter (DOM); Inhibition; Rape straw; Sclerotinia sclerotiorum; Selenium.

Sclerotinia sclerotiorum (S. sclerotiorum) is a soil-borne pathogen with broad host range. Dissolved organic matter (DOM) plays a vital role in regulating microbial activity in soil. Exogenous selenium (Se) inhibits plant pathogen growth and enhances the capacity of plants to resist disease. DOM from rape straw with Se treated in soil (RSDOMSe) was extracted, and the inhibitory effect on S. sclerotiorum growth was investigated. RSDOMSe inhibited S. sclerotiorum growth, which not only caused severe damage to S. sclerotiorum hyphae but also enhanced soluble protein leakage, thereby improving the growth inhibition ratio by 20.9%. As the action in intercellular, RSDOMSe led to a significant increase in oxalic acid and decrease in CWDE (cell wall-degrading enzyme, which helps pathogens to invade plants) activities, downregulation of Bi1 (BAX inhibitor-1, required for S. sclerotiorum virulence), Ggt1 (γ-glutamyl transpeptidase, regulates the ROS antioxidant system), CWDE2 and CWDE10 gene expression levels, compared with non-Se treated RSDOM (RSDOMN). Eight metabolites upregulated in RSDOMSe were identified by GC-TOF-MS, and among these metabolites, fumaric acid, maleic acid, malonic acid, mucic acid, saccharic acid, succunic acid and phenylacetic acid showed significant inhibition on S. sclerotiorum growth. These findings provide valuable insight into a new approach for developing eco-friendly fungicides.

Journal of Hazardous Materials published new progress about BAX inhibitor-1 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 87-73-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H10O8, Electric Literature of 87-73-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tian, Huaixiang; Xu, Xiaolin; Chen, Chen; Yu, Haiyan published the artcile< Flavoromics approach to identifying the key aroma compounds in traditional Chinese milk fan>, Synthetic Route of 104-76-7, the main research area is milk propanoic butanoic acid octanal aroma profile flavoromics China; aroma recombination and omission; gas chromatography-mass spectrometry; gas chromatography-olfactometry; key aroma compounds; milk fan.

To determine the key aroma compounds in Chinese milk fan cheese, samples from 6 of the most popular handmade milk fan workshops in Yunnan province of China were analyzed by gas chromatog.-mass spectrometry (GC-MS), gas chromatog.-olfactometry (GC-O), sensory evaluation, aroma recombination and omission experiments Seventy-one aroma compounds were identified by GC-MS, and 31 odor-active compounds were detected by GC-O. The relationships between the 31 odor-active compounds and 10 sensory evaluation properties were explored by partial least squares discriminant anal. The results identified 23 initial key aroma compounds, which were used to simulate the aroma profile of milk fan in aroma recombination experiments Aroma omission experiments identified propanoic acid, butanoic acid, octanoic acid, octanal, nonanal, 2-nonanone, and Et hexanoate as the key aroma compounds Propanoic acid and butanoic acid contributed to cheese and rancid aromas, octanal and nonanal to the fat aroma, octanoic acid and 2-nonanone to the cheese aroma, and Et hexanoate to the fruity aroma of milk fan.

Journal of Dairy Science published new progress about Acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Synthetic Route of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts