Category: alcohols-buliding-blocks

Tang, Ke published the artcileChemical and sensory characterization of cabernet sauvignon wines from the Chinese loess plateau region, Recommanded Product: 3-(Methylthio)propan-1-ol, the main research area is cabernet sauvignon wine chem sensory profile China; Cabernet Sauvignon; GC–O; Loess Plateau; aroma; sensory profile.

In this study, the aroma profiles of Cabernet Sauvignon wines from a new grape growing region, Loess Plateau, China, were established by gas chromatog.-olfactometry, gas chromatog.-mass spectrometry and sensory anal. The sensory profiles of wines form five different young vineyards in the Loess Plateau region were obtained by descriptive anal. Blackcurrant (p < 0.01), pear and dried plum (p < 0.05), mushroom, smoked and green pepper (p < 0.1) had significant differences on the five vineyards. A total of 76 odor-active aroma compounds were identified in the wines, and 45 volatile compounds were selected as those having the greatest impact on the aroma components and these were quantitated by five different methods. In addition, the correlation model of the Loess Plateau region's sensory characteristics and aroma compounds was established by partial least squares regression (PLSR) to determine the influence of various aroma active substances on aroma attributes. Molecules published new progress about Acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Recommanded Product: 3-(Methylthio)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Okahashi, Nobuyuki published the artcileSugar phosphate analysis with baseline separation and soft ionization by gas chromatography-negative chemical ionization-mass spectrometry improves flux estimation of bidirectional reactions in cancer cells, HPLC of Formula: 97-67-6, the main research area is breast cancer sugar phosphate GC NCI MS; (13)C-metabolic flux analysis; GC-MS; Negative chemical ionization; Sugar phosphate; o-(2,3,4,5,6-pentafluorobenzyl) oxime.

Precise measurement of sugar phosphates in glycolysis and the pentose phosphate (PP) pathway for 13C-metabolic flux anal. (13C-MFA) is needed to understand cancer-specific metabolism Although various anal. methods have been proposed, anal. of sugar phosphates is challenging because of the structural similarity of various isomers and low intracellular abundance. In this study, gas chromatog.-neg. chem. ionization-mass spectrometry (GC-NCI-MS) is applied to sugar phosphate anal. with o-(2,3,4,5,6-pentafluorobenzyl) oxime (PFBO) and trimethylsilyl (TMS) derivatization. Optimization of the GC temperature gradient achieved baseline separation of sugar phosphates in 31 min. Mass spectra showed the predominant generation of fragment ions containing all carbon atoms in the sugar phosphate backbone. The limit of detection of pentose 5-phosphates and hexose 6-phosphates was 10 nM. The method was applied to 13C-labeling measurement of sugar phosphates for 13C-MFA of the MCF-7 human breast cancer cell line. 13C-labeling of sugar phosphates for 13C-MFA improved the estimation of the net flux and reversible flux of bidirectional reactions in glycolysis and the PP pathway.

Metabolic Engineering published new progress about Amino acids Role: ANT (Analyte), ANST (Analytical Study) (branched chain). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, HPLC of Formula: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Disdier, Zoe published the artcileEffect of solutes structure and pH on the n-octanol/water partition coefficient of ionizable organic compounds, Name: n-Octanol, the main research area is review solute pH noctanol water ionizable organic compound; Carboxylic acids; Emerging organic contaminant; Ionizable compounds; Partition coefficient; Zwitterion; n-octanol.

Liquid-liquid partition coefficient is a useful tool to predict biol. and environmental fate of organic compounds, for example bioaccumulation or toxicity of lipophilic contaminants. Conversely, the partitioning of ionizable compounds is poorly studied in contrast to that of neutral compounds Yet, such topic deserves attention, since numerous organic contaminants are ionizable as well as their degradation products. Hence, the contribution of charged species has to be considered in order to model accurately the mass balance or partition of ionizable compounds In this context, we investigated the liquid-liquid partition of 13 ionizable compounds (oxalic acid, histidine, benzimidazole, etc.), covering various classes of compounds (carboxylic acids, amino-acids, etc.). The n-octanol/water partition coefficient was measured from pH 1 up to 13, in order to fully gather the distribution of both neutral and charged species. Empirical models describing these results are reviewed and partition parameters adjusted for charged species. The study of benzoic acid derivatives (benzoic, salicylic, ortho- and iso-phthalic acids) provides insights on the influence of chem. groups on the partitioning. In the case of tryptophan, the use of acid/base microconstants allowed to estimate the partition of both the zwitterion and its neutral tautomer. Despite a major zwitterionic form (log PZ(tryptophan) = -1.58 ± 0.30), the minor but neutral tautomer (log PN(tryptophan) = +0.03 ± 0.30) drives the partition equilibrium Overall, the provided data may be useful to assess the retention of contaminants, its dependency on pH and salinity variations, and thus understanding their environmental fate. Such data may also be useful as well for mol. simulation involving solvation of organic ions in aqueous and non-aqueous solvents.

Chemosphere published new progress about Amino acids Role: TEM (Technical or Engineered Material Use), USES (Uses). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Shen, Lingyun published the artcileSelective Transformation of Vicinal Glycols to α-Hydroxy Acetates in Water via a Dehydrogenation and Oxidization Relay Process by a Self-Supported Single-Site Iridium Catalyst, Application In Synthesis of 92093-23-7, the main research area is alpha hydroxy acetate preparation; vicinal glycol dehydrogenation oxidization relay process water; self supported single site iridium catalyst.

α-Hydroxy acids have attracted broad attention because of their prevalence in bioactive mols. and biodegradable polymers, but their conventional syntheses are usually restricted to aromatic substrates, especially, in a stepwise manner. Herein, the transformation of alkyl and aryl vicinal glycols to α-hydroxy acetates in water under the air atm. with the solid self-supported NHC-Ir single-site catalyst is reported. Both aliphatic and aromatic glycols are compatible with a much higher catalytic efficiency in the presence of this solid single-site catalyst than other viable mol. catalysts (93% vs <35%) because of the ""isolation effect"". Remarkably, this catalyst could be reused for 20 runs without an obvious loss in catalytic activity and selectivity. Control experiments and d. functional theory calculations reveal that the reaction firstly undergoes a dehydrogenation facilitated by the catalyst, and then it proceeds through an unexpected oxidization relay step by oxygen in the air, leading to the α-hydroxy acetate formation. This protocol can potentially contribute to the valorization of readily available and inexpensive diols. ACS Catalysis published new progress about Acetates Role: SPN (Synthetic Preparation), PREP (Preparation) (hydroxy). 92093-23-7 belongs to class alcohols-buliding-blocks, name is 1-(4-Bromophenyl)ethane-1,2-diol, and the molecular formula is C8H9BrO2, Application In Synthesis of 92093-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gou, Bo-Bo published the artcileScandium Triflate Catalyzed Tandem Transfer Hydrogenation and Cyclization Reaction of o-Aminobenzaldehydes and o-Aminoacetophenone with Alcohols, COA of Formula: C5H12O, the main research area is benzoxazine preparation; aminobenzaldehyde alc tandem hydrogenation cyclization reaction scandium triflate catalyst; alc aminoacetophenone tandem hydrogenation cyclization reaction scandium triflate catalyst.

An effective Sc-catalyzed transfer hydrogenation and cyclization tandem reaction has been achieved. This process showed excellent functional group compatibility and good yields. A variety of benzoxazines I (R = H, Me; R1 = H, Me, Et; R2 = Me, Ph, naphthalen-1-yl, thiophen-2-ylmethyl, etc.; R1R2 = -(CH2)5-; R3 = H, F, Cl, Me, Br; R4 = H, Me; R5 = H, Me, Cl, Br) were produced with primary or secondary alcs. R2(R3)CH2OH as a hydrogen source. Furthermore, the utility of this newly developed protocol is demonstrated through scaled-up experiment, late-stage modification, and preliminary exploration of enantioselective synthesis.

Journal of Organic Chemistry published new progress about Acetophenones Role: RCT (Reactant), RACT (Reactant or Reagent) (o-amino). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, COA of Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yang, Yurong published the artcileCharacterization of the key aroma compounds of a sweet rice alcoholic beverage fermented with Saccharomycopsis fibuligera, Synthetic Route of 505-10-2, the main research area is Saccharomycopsis fibuligera aroma compound sweet rice alc beverage fermentation; Key aroma compounds; Saccharomycopsis fibuligera; Sweet rice alcoholic beverage.

This study aimcharacterization of key aroma compounds of sweet rice alc. beverage fermented with Saccharomycopsis fibuligeras to examine the effect of the non-Saccharomyces yeast Saccharomycopsis fibuligera on the sensory quality and flavor characteristics of a sweet rice alc. beverage. The strain S. fibuligera was isolated from a traditional Chinese hand-made starter with the purpose to improving sweet rice wine fragrance. Here, sweet rice wines were produced by six combinations of three species of fermentation strains, including S. fibuligera, Rhizopus and Saccharomyces cerevisiae, for evaluation. The study results showed significant diversities within these rice wines based on indicators including the score of quant. descriptive anal. and volatile variety and content as well as odor activity value (OAV). Quant. results showed that 43 volatile compounds were identified by headspace-solid phase microextraction with gas chromatog.-mass spectrometry among samples. Based on the principal component anal. and OAV calculation, the two samples (S-2 and S-3) fermented with S. fibuligera and Rhizopus possessed high scores and were distinguished from the others, and Et butanoate, Et hexanoate, β-phenylethyl alc. and 1-octen-3-one with high OAVs were responsible for the key aroma of sweet rice wine fermented with S. fibuligera. Co-inoculating S. fibuligera, Rhizopus or/and S. cerevisiae generated more pleasant aroma compounds in a sweet rice alc. beverage than when inoculated individually.

Journal of Food Science and Technology (New Delhi, India) published new progress about Acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Synthetic Route of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sousa, Antonio published the artcileGeographical differentiation of apple ciders based on volatile fingerprint, Category: alcohols-buliding-blocks, the main research area is apple cider volatile fingerprint geog differentiation; Apple varieties (Malus domestica); Geographical regions; Markers; Volatile organic compounds.

With the globalization of food trade, its traceability and genuineness becomes increasingly more difficult. Therefore, it is necessary to develop anal. tools to define the authenticity and genuineness of food-derived products. In the current work, headspace solid-phase microextraction followed by gas chromatog.-mass spectrometry (HS-SPME/GC-MS) combined with chemometric tools was used to establish the volatile fingerprint of apple ciders produced in different geog. regions of Madeira Island, in order to define their typicity and to identify putative geog. markers. A total of 143 volatile organic compounds (VOCs) belonging to different chem. families have been identified, of which 28 were found in all apple ciders independently of geog. region. Esters, terpenic and furanic compounds presented on average a higher contribution for the total volatile fingerprint in cider produced in northern region of the Island, whereas alcs., acids, volatile phenols, carbonyl compounds and lactones in cider from southern region. Considering the relative areas of the VOCs, 43 revealed statistically significant differences (p < 0.001) between geog. regions, and 11 between northern and southern regions. A clear differentiation among cider-producing regions was observed on the developed partial least squares-discriminant anal. (PLS-DA) model. Two alcs. (1-hexanol, 1-octanol), 6 esters (Me acetate, (Z)-3-hexen-1-ol acetate, Et hexanoate, Et nonanote, Et octanoate, isoamyl octanoate) and 1 terpenic compound (limonene), can be considered putative geog. markers due to their discriminatory ability. The results obtained recognize the specific and typical geog. characteristics of the cider, which will allow the forthcoming guarantee for the construction of a sustainable platform for the establishment of the authenticity and typicality of the regional cider. Food Research International published new progress about Acids Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 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

Niu, Feng published the artcileCatalyst Deactivation for Enhancement of Selectivity in Alcohols Amination to Primary Amines, Product Details of C8H18O, the main research area is primary amine chemoselective preparation; alc deactivated cobalt catalyst chemoselective amination; kinetics catalyst characterization chemoselective amination alc cobalt.

The selectivity of cobalt catalysts generated from alumina-supported cobalt for chemoselective amination of alcs. with ammonia to give primary amines improved with pretreatment with 1-butanol or other alcs. The modified catalysts were characterized and the inactivating carbon species generated were characterized on extraction of the catalysts. The effect of carbon deposition on the amination selectivity likely arises from steric inhibition of the hydrogenation of bulky secondary imine intermediates over partially carbon-decorated cobalt nanoparticles.

ACS Catalysis published new progress about Alcohols Role: RCT (Reactant), RGT (Reagent), RACT (Reactant or Reagent). 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

Fokin, Igor published the artcileChemoselective Electrochemical Hydrogenation of Ketones and Aldehydes with a Well-Defined Base-Metal Catalyst, COA of Formula: C5H12O, the main research area is alc preparation chemoselective green chem; ketone electrochem hydrogenation manganese complex catalyst; aldehyde electrochem hydrogenation manganese complex catalyst; catalysis; homogeneous catalysis; molecular electrochemistry; reaction mechanisms; spectroelectrochemistry.

An electrochem. method for the hydrogenation of ketones RC(O)R1 [R = Me, Et; R1 = CH3, CH2CH3, (CH2)2CH3, (CH2)2CH=C(CH3)2, (CH2)2CH=CH2] and aldehydes R2CHO [R2 = (CH2)3CH3, (CH2)4CH3, (CH2)2CH=CH2] by in situ formation of a Mn-H species has been described. The protons and elec. current as surrogate for H2 and a base-metal complex to form selectively the alcs. RCH(OH)R1 and R2CH2OH have been described. The method is chemoselective for the hydrogenation of C=O bonds over C=C bonds. Mechanistic studies revealed initial 3 e- reduction of the catalyst forming the steady state species [Mn2(H-1L)(CO)6]-. Subsequently, the protonation, reduction and internal proton shift forming the hydride species has been described. Finally, the transfer of the hydride and a proton to the ketone yields the alc. and the steady state species is regenerated via reduction The interplay of two manganese centers and the internal proton relay represent the key features for ketone and aldehyde reduction as the resp. mononuclear complex and the complex without the proton relay are barely active.

Chemistry – A European Journal published new progress about Aliphatic alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, COA of Formula: C5H12O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bhattacharyya, Dipanjan published the artcileSelective Catalytic Synthesis of α-Alkylated Ketones and β-Disubstituted Ketones via Acceptorless Dehydrogenative Cross-Coupling of Alcohols, Name: 3-Pentanol, the main research area is primary alkanol aryl secondary alc ruthenium catalyst selective alkylation; arylethanol secondary alc ruthenium catalyst selective dehydrogenative cross coupling; aryl alkanone preparation green chem.

A phosphine-free pincer ruthenium(III) catalyzed β-alkylation of secondary alcs. with primary alcs. to α-alkylated ketones and two different secondary alcs. to β-branched ketones were reported. Notably, this transformation was environmentally benign and atom efficient with H2O and H2 gas as the only byproducts. The protocol was extended to gram-scale reaction and for functionalization of complex vitamin E and cholesterol derivatives

Organic Letters published new progress about Alkyl aryl ketones Role: SPN (Synthetic Preparation), PREP (Preparation). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Name: 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts