Tag: M.W=100-150

Eprintsev, Alexander T. published the artcileAconitate isomerase from maize leaves: Light-dependent expression and kinetic properties, SDS of cas: 97-67-6, the main research area is Zea leaf aconitate isomerase citrate malate; Aconitate isomerase; Citrate; Maize (Zea mays L.); Phytochrome; Trans-aconitate.

Aconitate isomerase (EC 5.3.3.7) interconverts cis- and trans-isomers of aconitic acid. Expression of the gene encoding this enzyme was studied in maize (Zea mays L.) leaves depending on light regime. Aconitate isomerase was induced by white and by red light indicating the involvement of phytochrome in the regulation of gene expression. The enzyme was partially purified from maize leaves. The value of Km was 0.75 mM with cis-aconitate and 0.92 mM with trans-aconitate, pH optimum was 8.0-8.2 with both substrates, citrate and malate suppressed its activity. It is concluded that aconitate isomerase actively participates in the interconversion of cis- and trans-aconitate in the light providing a possibility of using the pool of trans-aconitate for the regulation of the tricarboxylic acid cycle activity and mediating citrate/isocitrate supply for the biosynthetic and signaling purposes in photosynthetic cells.

Journal of Plant Physiology published new progress about cDNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, SDS of cas: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Kaizheng published the artcileAssessment of β-glucans, phenols, flavor and volatile profiles of hulless barley wine originating from highland areas of China, Application In Synthesis of 505-10-2, the main research area is barley wine glucan phenol flavor volatile profile; Flavor; Hulless barley wine; PCA; Phenols; β-Glucan.

Low alc. hulless barley wine (HW) is a popular beverage among the highland areas in China. It is known to have several health benefits due to the presence of β-glucan and antioxidant compounds Therefore, the total β-glucan content, total phenols and flavonoids of HW samples from the highland areas of Sichuan province and Tibet were determined in this study. The results indicated that HW is abundant in both β-glucan (54-76 mg/L) and phenolic compounds (131-178 mg/L). Moreover, this study also investigated the flavor and aroma characteristics of HW samples. A total of forty six volatile aroma substances were identified by GC-MS. The HWs could be classified into three distinct groups in terms of the region of origin according to the results of PCA based on the GC-MS data. These findings provide a useful foundation for further study of the health benefits and the flavor characteristics of HW in highland areas.

Food Chemistry published new progress about Alcohols Role: ANT (Analyte), PRP (Properties), ANST (Analytical Study). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Application In Synthesis of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Reynard, Guillaume published the artcileEtherification of phenols by amines via transient diazonium intermediates, Related Products of alcohols-buliding-blocks, the main research area is phenol alkyl amine propanedinitrite etherification; alkyl phenyl ether preparation.

The synthesis of alkyl aryl ethers from electron poor phenols and amines using 1,3-propanedinitrite was described. Due to the mild conditions, functionalized primary, secondary and tertiary alkyl groups were successfully introduced, denoting a highly tolerant process that allowed for unprotected alcs. and acetals. The reaction was thought to proceeded through the formation of a diazonium intermediate that undergoes subsequent SN2> or SN1 reactions.

Canadian Journal of Chemistry published new progress about Alkyl aryl ethers Role: SPN (Synthetic Preparation), PREP (Preparation). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Polshettiwar, Vivek published the artcileNano-organocatalyst: magnetically retrievable ferrite-anchored glutathione for microwave-assisted Paal-Knorr reaction, aza-Michael addition, and pyrazole synthesis, Name: 3-(1H-Pyrrol-1-yl)propan-1-ol, the main research area is Paal Knorr aza Michael pyrazole synthesis microwave glutathione nanocatalyst.

Postsynthetic surface modification of magnetic nanoparticles by glutathione imparts desirable chem. functionality and enables the generation of catalytic sites on the surfaces of ensuing organocatalysts. In this article, we discuss the developments, unique activity, and high selectivity of nano-organocatalysts for microwave-assisted Paal-Knorr reaction, aza-Michael addition, and pyrazole synthesis. Their insoluble character coupled with paramagnetic nature enables easy separation of these nano-catalysts from the reaction mixture using external magnet, which eliminates the requirement of catalyst filtration.

Tetrahedron published new progress about Amino acid esters Role: SPN (Synthetic Preparation), PREP (Preparation). 50966-69-3 belongs to class alcohols-buliding-blocks, name is 3-(1H-Pyrrol-1-yl)propan-1-ol, and the molecular formula is C7H11NO, Name: 3-(1H-Pyrrol-1-yl)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Oliveira, Paulo Marcelo Rayner published the artcileExposure of Catasetum fimbriatum aerial roots to light coordinates carbon partitioning between source and sink organs in an auxin dependent manner, Formula: C4H6O5, the main research area is Catasetum aerial root carbon partitioning auxin organic acid light; Auxin; Carbon partitioning; Carbon sources; Catasetum; Light; Orchid; Roots.

Light energy is essential for carbon metabolism in plants, as well as controlling the transport of metabolites between the organs. While terrestrial plants have a distinct structural and functional separation between the light exposed aerial parts and the non-exposed roots, epiphytic plants, such as orchids, have shoots and roots simultaneously fully exposed to light. The roots of orchids differ mainly from non-orchidaceous plants in their ability to photosynthesize. Since the roots of Catasetum fimbriatum can synthesize auxin which is acropetally transported to the shoot region, we decided to investigate whether: (1) light treatment of C. fimbriatum roots raises the auxin levels in the plant; and (2) distinct auxin concentrations can change the source-sink relationships, altering the amounts of sugars and organic acids in leaves, pseudobulbs and roots. Among the organs studied, the roots accumulated the highest concentrations of indole-3-acetic-acid (IAA); and when roots were exposed to light, IAA accumulated in the leaves. However, when polar auxin transport (PAT) was blocked with N-(1-Naphthyl)phthalamic acid (NPA) treatment, a significant accumulation of sugars and organic acids occurred in the pseudobulbs and leaves, resp., suggesting that auxin flux from roots to shoots was involved in carbon partitioning of the aerial organs. Considering that C. fimbriatum plants lose all their leaves seasonally, it is possible the roots are a substituting influence on the growth and development of this orchid during its leafless period.

Plant Physiology and Biochemistry (Issy-les-Moulineaux, France) published new progress about Auxins Role: DGN (Diagnostic Use), BIOL (Biological Study), USES (Uses). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Formula: C4H6O5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Das, Uttam Kumar published the artcileDehydrogenative Cross-Coupling of Primary Alcohols To Form Cross-Esters Catalyzed by a Manganese Pincer Complex, Category: alcohols-buliding-blocks, the main research area is primary alc manganese pincer complex catalyst dehydrogenative cross coupling; cross ester preparation.

Base-metal-catalyzed dehydrogenative cross-coupling of primary alcs. to form cross-esters as major products, liberating hydrogen gas, is reported. The reaction is catalyzed by a pincer complex of earth-abundant manganese in the presence of catalytic base, without any hydrogen acceptor or oxidant. Mechanistic insight indicates that a dearomatized complex is the actual catalyst, and indeed this independently prepared dearomatized complex catalyzes the reaction under neutral conditions.

ACS Catalysis published new progress about Carboxylic esters Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Diaz, Irina published the artcileCombined effects of sulfur dioxide, glutathione and light exposure on the conservation of bottled Sauvignon blanc, Category: alcohols-buliding-blocks, the main research area is Wine Oxidation Light exposure Antioxidants Storage; Antioxidants; Light exposure; Oxidation; Storage; Wine.

Oxygen exposure may trigger a series of changes that could be detrimental to the quality white wines. This study evaluated the combined effects of sulfur dioxide, glutathione and light exposure on the chem. and sensory perception of bottled Sauvignon blanc. The wines were manually bottled into clear bottles, closed with low oxygen transfer rate stoppers, and stored for three months, either exposed or protected from light. The wines exposed to artificial light showed higher rates of sulfite loss and oxygen consumption, were significantly darker in color, exhibited significant changes in the concentration of phenolics and volatile compounds, were perceived as less fruity/floral, and had higher nuances of solvent, earthy and honey aromas than the ones protected from light. The treatments with higher amounts of initial sulfites and glutathione were able to delay some of these changes but were less significant than protecting the wines from artificial light.

Food Chemistry published new progress about Polyphenols (nonpolymeric) Role: ANT (Analyte), ANST (Analytical Study). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Song, Qing-Wen published the artcileSelective Conversion of CO2 and Switchable Alcohols into Linear or Cyclic Carbonates via Versatile Zinc Catalysis, Recommanded Product: 3,5-Dimethylhex-1-yn-3-ol, the main research area is alc carbon dioxide zinc catalyst; carbonate preparation; dioxolanone preparation.

Herein, selective catalytic conversion of CO2 and switchable alc. candidates to produce linear or cyclic carbonates and α-hydroxy ketones via effective zinc catalyst was developed. A series of primary alcs. and cyclohexanol, 1,2-diols, and water can serve as nucleophiles to give alkyl or aryl 2-substituted-3-oxobutan-2-yl carbonates, substituted 1,3-dioxolan-2-ones, 3-substituted 3-hydroxybutan-2-ones, resp. with excellent selectivity and high yields.

Synthesis published new progress about Alcohols, unsaturated Role: RCT (Reactant), RACT (Reactant or Reagent). 107-54-0 belongs to class alcohols-buliding-blocks, name is 3,5-Dimethylhex-1-yn-3-ol, and the molecular formula is C8H14O, Recommanded Product: 3,5-Dimethylhex-1-yn-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Cibotaru, Dorina published the artcileComparison of liquid-liquid extraction, microextraction and ultrafiltration for measuring free concentrations of testosterone and phenytoin, Related Products of alcohols-buliding-blocks, the main research area is testosterone phenytoin liquid extraction microextraction ultrafiltration; albumin; free concentration; liquid–liquid extraction; phenytoin; plasma protein binding; solid-phase microextraction; testosterone; ultrafiltration.

The purpose of the study was to find methods suitable for measuring the free concentrations of testosterone and phenytoin. Sample solutions of the compounds in buffer and human albumin were processed using liquid-liquid extraction, microextraction and ultrafiltration and analyzed by LC-MS/MS. Liquid-liquid extraction with di-Bu phthalate provided complete extraction from buffer solutions and partial extraction from albumin samples. Spintip C18 devices provided exhaustive extraction from buffer and albumin samples. Spintip C8 devices offered complete extraction from buffer and approx. 50% recovery from albumin samples. Centrifree ultrafiltration devices showed high recovery of free concentrations from all the samples, while Amicon and Nanosep devices provided partial recovery. Spintip C8 and Centrifree devices proved useful for measuring free concentrations

Bioanalysis published new progress about Human albumins Role: AMX (Analytical Matrix), ANST (Analytical Study). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chang, Liping published the artcileFixing CO2 into β-oxopropylcarbamates in neat condition by ionic gelation/Ag(I) supported on dendritic fibrous nanosilica, Application of 3,5-Dimethylhex-1-yn-3-ol, the main research area is recyclable silver supported dendritic fibrous nanosilica ionic gelation preparation; amine propargyl alc carbon dioxide silica three component coupling; oxo propyl carbamate preparation.

A novel approach to produced a novel nanocatalyst, AgBr supported on an ionic gelation (IG)-based nanomaterial was developed through the aqueous coprecipitation approach for the dendritic fibrous nanosilica (DFNS) production and the wet impregnation method for IG coating, taking into account TPP as the crosslinking agent. In addition, DFNS/IG@Ag(I) was heterogeneous features that contributed to the quick improvement of the catalyst by filtration separation The catalytic activity of DFNS/IG@Ag(I) was examined to synthesize β-oxopropylcarbamates through a multicomponent coupling of CO2, amines and propargyl alcs. in moderate conditions. The DFNS/IG@Ag(I) NPs were completely investigated by taking advantage of TG, TEM, FESEM and FT-IR spectroscopy anal. The DFNS/IG@Ag(I) nanocatalyst indicated high stability in the reaction for five cycles without considerable loss of some properties like activity, which could be because of the high loading of IG on the catalyst surface.

RSC Advances published new progress about Alcohols, propargyl Role: RCT (Reactant), RACT (Reactant or Reagent). 107-54-0 belongs to class alcohols-buliding-blocks, name is 3,5-Dimethylhex-1-yn-3-ol, and the molecular formula is C8H14O, Application of 3,5-Dimethylhex-1-yn-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts