Tag: 100-200

Enriching volatile aromatic compounds of lavender hydrolats by PDMS/ceramic composite membranes was written by Xu, Shuainan;Zuo, Chengye;Sun, Xuefei;Ding, Xiaobin;Zhong, Zhaoxiang;Xing, Weihong;Jin, Wanqin. And the article was included in Separation and Purification Technology in 2022.Name: Oct-1-en-3-ol This article mentions the following:

Lavender hydrolats are of low value due to its low aromatic compound concentration This work applied polydimethylsiloxane (PDMS) /ceramic composite membranes to enrich volatile aromatic compounds (linalool, terpinen-4-ol, α-terpineol, and camphor) of lavender hydrolats for improving antioxygenic property. The effect of operating conditions on the enrichment was systematically studied. The results showed that the fluxes of the four aromatic compounds increased with the increase of feed concentration in the binary simulation system. The enrichment factor of camphor increased more significantly than other components with the increase of flow velocity and the total flux was basically unchanged in pervaporation. The flux of lavender hydrolats was 254.84 g·m^-2·h^-1, the enrichment factors of linalool, terpinen-4-ol, α-terpineol, and camphor were found to be 5.64, 4.56, 2.59 and 15.31 at 40°C, resp. The free radical scavenging rate of enriched lavender hydrolats was significantly improved. This work provides a basis for the recovery of aromatic compounds from lavender hydrates by using PDMS/ceramic composite membranes. In the experiment, the researchers used many compounds, for example, Oct-1-en-3-ol (cas: 3391-86-4Name: Oct-1-en-3-ol).

Oct-1-en-3-ol (cas: 3391-86-4) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. Grignard and organolithium reagents are powerful tools for organic synthesis, and the most common products of their reactions are alcohols.Name: Oct-1-en-3-ol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chemotype of Litsea cubeba Essential Oil and Its Bioactivity was written by Abdul Hammid, Syaliza;Ahmad, Fasihuddin. And the article was included in Natural Product Communications in 2015.Quality Control of rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate This article mentions the following:

The essential oils from different parts of Litsea cubeba, collected from the highlands of Sarawak, were isolated and their chem. compositions analyzed. This study demonstrated significant variations in the chem. compositions and the chem. profiles of the volatiles and could provide valuable supplementary information on the geog. variations of the species. The fruit essential oil was dominated by citronellal, d-limonene and citronellol, while the leaf oil was high in eucalyptol and α-terpineol. High concentrations of citronellal and citronellol in both the root and bark oils were identified. In the stem, the oil was dominated by eucalyptol, d-limonene and α-terpineol. The activity of the oils against brine shrimp larvae, bacteria, yeast and fungi was determined The oils were toxic against brine shrimp larvae with LC₅₀ values ranging from 25.1 – 30.9μL/mL. The oils also demonstrated a wide spectrum of inhibition against microorganisms with inhibition zones between 19.5 – 46.7 mm against Gram-pos. bacteria and 10.5 – 90.0 mm against yeast and fungi. However, the oils were not active against Gram-neg. bacteria. In the experiment, the researchers used many compounds, for example, rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate (cas: 2451-01-6Quality Control of rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate).

rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate (cas: 2451-01-6) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. A multistep synthesis may use Grignard-like reactions to form an alcohol with the desired carbon structure, followed by reactions to convert the hydroxyl group of the alcohol to the desired functionality.Quality Control of rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Highly enantiomeric reduction of acetophenone and its derivatives by locally isolated Rhodotorula glutinis was written by Zilbeyaz, Kani;Kurbanoglu, Esabi B.. And the article was included in Chirality in 2010.SDS of cas: 171032-87-4 This article mentions the following:

Ninety isolates of microorganisms belonging to different taxonomical groups (30 bacteria, 20 yeast, and 40 fungi) were previously isolated from various samples. These isolates were screened as reducing agents for acetophenone 1a to phenylethanol 2a. It was found that the isolate EBK-10 was the most effective biocatalyst for the enantioselective bioreduction of acetophenone. This isolate was identified as Rhodotorula glutinis by the VITEK 2 Compact system. The various parameters (pH 6.5, temperature 32°C, and agitation 200 rpm) of the bioreduction reaction was optimized, which resulted in conversions up to 100% with >99% enantiomeric excesses (ee) of the S-configuration. The preparative scale bioreduction of acetophenone 1a by R. glutinis EBK-10 gave (S)-1-phenylethanol 2a in 79% yield, complete conversion, and >99% ee. In addition, R.glutinis EBK-10 successfully reduced various substituted acetophenones. Chirality, 2010. © 2010 Wiley-Liss, Inc. In the experiment, the researchers used many compounds, for example, (S)-1-(2-Fluorophenyl)ethanol (cas: 171032-87-4SDS of cas: 171032-87-4).

(S)-1-(2-Fluorophenyl)ethanol (cas: 171032-87-4) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. Tertiary alcohols cannot be oxidized at all without breaking carbon-carbon bonds, whereas primary alcohols can be oxidized to aldehydes or further oxidized to carboxylic acids.SDS of cas: 171032-87-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Some high-potential trithioether chelates of copper was written by Kanters, Rene P. F.;Yu, Ru;Addison, Anthony W.. And the article was included in Inorganica Chimica Acta in 1992.SDS of cas: 1122-71-0 This article mentions the following:

The linear quadridentate ligand 1,8-bis(2′-quinolyl)-3,6-dithiaoctane and the 3 quinquedentate ligands 1,9-bis(2′-pyridyl)-2,5,8-trithianonane, 1,9-bis(6′-methyl-2′-pyridyl)-2,5,8-trithianonane and 1,11-bis(2′-quinolyl)-3,6,9-trithiaundecane were prepared The deep green-blue Cu(II) chelates were characterized by optical and ESR spectroscopy and cyclic voltammetry. The 2 pyridyl chelates had similar tetragonal coordination about the Cu, with an equatorial N₂S₂ donor set, plus the 3rd thioether S bound axially. The most marked consequence of the pyridine α-methylation was that the Cu²⁺/⁺ reduction potential was raised by ∼200 mV; otherwise, the E_1/2 was consonant with previously advanced models for correlating redox potentials with ligand structural features. The pyridyl Cu(II) complexes were isolated as the tetrafluoroborate salts, whereas the quinolyl-Cu(II) chelates were rather redox unstable, in association with even more pos. Cu²⁺/⁺ E_1/2 values, similar to that for dibromine reduction In the experiment, the researchers used many compounds, for example, 6-Methyl-2-pyridinemethanol (cas: 1122-71-0SDS of cas: 1122-71-0).

6-Methyl-2-pyridinemethanol (cas: 1122-71-0) belongs to alcohols. Alcohols are weak acids. The most acidic simple alcohols (methanol and ethanol) are about as acidic as water, and most other alcohols are somewhat less acidic. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.SDS of cas: 1122-71-0

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Light-Responsive, Shape-Switchable Block Copolymer Particles was written by Lee, Junhyuk;Ku, Kang Hee;Kim, Jinwoo;Lee, Young Jun;Jang, Se Gyu;Kim, Bumjoon J.. And the article was included in Journal of the American Chemical Society in 2019.Application of 60463-12-9 This article mentions the following:

A robust strategy is developed for preparing light-responsive block copolymer (BCP) particles in which shape and color can be actively controlled with high spatial and temporal resolution The key to achieving light-responsive shape transitions of BCP particles is the design and synthesis of surfactants containing light-active groups (i.e., nitrobenzyl esters and coumarin esters) that modulate the amphiphilicity and interfacial activity of the surfactants in response to light of a specific wavelength. These light-induced changes in surfactant structure modify the surface and wetting properties of BCP particles, affording both shape and morphol. transitions of the particles, for example from spheres with an onion-like inner morphol. to prolate or oblate ellipsoids with axially stacked nanostructures. In particular, wavelength-selective shape transformation of the BCP particles can be achieved with a mixture of two light-active surfactants that respond to different wavelengths of light (i.e., 254 and 420 nm). Through the use of light-emitting, photoresponsive surfactants, light-induced changes in both color and shape are further demonstrated. Finally, to demonstrate the potential of the light-triggered shape control of BCP particles in patterning features with microscale resolution, the shape-switchable BCP particles are successfully integrated into a patterned, free-standing hydrogel film, which can be used as a portable, high-resolution display. In the experiment, the researchers used many compounds, for example, 3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9Application of 60463-12-9).

3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.Application of 60463-12-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Plants as a green alternative for alcohol preparation from aromatic aldehydes was written by Suarez-Franco, Gabriela;Hernandez-Quiroz, Teresa;Navarro-Ocana, Arturo;Oliart-Ros, Rosa Maria;Valerio-Alfaro, Gerardo. And the article was included in Biotechnology and Bioprocess Engineering in 2010.Product Details of 1122-71-0 This article mentions the following:

A general methodol. for the efficient reduction of aromatic aldehydes and three ketones to their corresponding alcs. (interesting as cosmetic fragrances in their majority) with moderate to excellent chem. yield was achieved by using homogenates of broccoli (B. oleracea var. italica), cauliflower (B. oleracea var. botrytis), beet (B. vulgaris var. cicla), and spinach (S. oleraceae) in aqueous suspension and mild reaction conditions. B. oleracea var. italica and B. oleracea var. botrytis gave the maximum bioconversion yields within short reaction times. Vegetables assayed exhibited an excellent yield (≥ 99%) after 24 h for aromatic aldehydes. In the experiment, the researchers used many compounds, for example, 6-Methyl-2-pyridinemethanol (cas: 1122-71-0Product Details of 1122-71-0).

6-Methyl-2-pyridinemethanol (cas: 1122-71-0) belongs to alcohols. Similar to water, an alcohol can be pictured as having an sp3 hybridized tetrahedral oxygen atom with nonbonding pairs of electrons occupying two of the four sp3 hybrid orbitals. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Product Details of 1122-71-0

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

The effect of inoculation Leuconostoc mesenteroides and Lactiplantibacillus plantarum on the quality of Pleurotus eryngii Jiaosu was written by Jiang, Jikang;Li, Wenxiang;Yu, Shuping. And the article was included in LWT–Food Science and Technology in 2022.SDS of cas: 149-32-6 This article mentions the following:

To investigate the effects of inoculating Leuconostoc mesenteroides or Lactiplantibacillus plantarum on the changes in metabolites in Pleurotus eryngii Jiaosu, a fermented plant extract rich in nutrients and bioactive compounds, the physicochem. and metabolite features of the treated Jiaosu were compared to those of spontaneously-fermented Jiaosu. The physicochem. features of Jiaosu fermented with Leuconostoc mesenteroides or Lactiplantibacillus plantarum were superior to spontaneously-fermented Jiaosu. An Partial Least Squares Discrimination Anal. (PLS-DA) score plot showed a clear difference in metabolites between spontaneous fermentation group (SFG) and inoculated Lactiplantibacillus plantarum group (LPG). Metabolites were remarkably different between LPG and SFG on the first day of fermentation The differential metabolites included sugars, acids and alcs. This study highlights the applicability of GC-MS based metabolomics as a tool to monitor Jiaosu fermentation In the experiment, the researchers used many compounds, for example, (2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6SDS of cas: 149-32-6).

(2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.SDS of cas: 149-32-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Imidazolium ion tethered TsDPENs as efficient water-soluble ligands for rhodium catalyzed asymmetric transfer hydrogenation of aromatic ketones was written by Kang, Guowei;Lin, Silong;Shiwakoti, Atul;Ni, Bukuo. And the article was included in Catalysis Communications in 2014.Category: alcohols-buliding-blocks This article mentions the following:

An imidazolium ion tethered TsDPEN has been synthesized readily and used as a water-soluble ligand for [Cp*RhCl₂]₂ catalyzed asym. transfer hydrogenation (ATH) of aromatic ketones in water. This process provided secondary alcs. in moderate to excellent conversions (up to 100%) with high enantioselectivity (up to 98% ee) under mild reaction conditions without adding any surfactants. The catalytic system is highly effective with the substrate to catalyst (S/C) ratio of 500 and low hydride donor loading of 1.5 equivalent of HCO₂Na. The procedure presented is simple and makes this method suitable for practical use. The synthesis of the target compounds was achieved using [[[[[(amino)diphenylethyl]amino]sulfonyl]phenyl]methyl]imidazolium salt and a rhodium complex as catalyst combination. The catalyst was prepared using N-[(1S,2S)-2-amino-1,2-diphenylethyl]carbamic acid 1,1-dimethylethyl ester and imidazole derivatives as starting materials. Under optimized conditions di-μ-(chloro)dichlorobis[(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]dirhodium was used as a catalyst. Transfer hydrogenation of 1-(phenyl)ethanone (acetophenone) derivatives gave (αS)-α-(methyl)benzenemethanol (chiral benzyl alc.) derivatives In the experiment, the researchers used many compounds, for example, (S)-1-(2-Fluorophenyl)ethanol (cas: 171032-87-4Category: alcohols-buliding-blocks).

(S)-1-(2-Fluorophenyl)ethanol (cas: 171032-87-4) belongs to alcohols. A strong base can deprotonate an alcohol to yield an alkoxide ion (R―O−). For example, sodamide (NaNH2), a very strong base, abstracts the hydrogen atom of an alcohol. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Thermo-sensitive ionic hydrogels synthesis via post quaternization cross-linking: A highly efficient reusable catalytic thermo-responsive nanoreactors was written by Maddahzadeh-Darini, Nastaran;Ghorbanloo, Massomeh;Mori, Masami;Yahiro, Hidenori. And the article was included in Applied Organometallic Chemistry in 2022.Application of 873-76-7 This article mentions the following:

Radical polymerization reactions were employed to synthesize thermo-responsive poly(N-isopropylacrylamide-co-1-vinylimidazole), p (NIPAM-co-VIm), hydrogels at room temperature A postquaternized crosslinking strategy was reported to fabricate thermo-sensitive quaternized-p (NIPAM-co-VIm) ionic hydrogels, Q-p (NIPAm-co-VIm). Combination of methods (high-resolution XPS, dynamic light scattering, and at. absorption spectroscopy) was employed to characterize the composite material. Following the concept of a “green chem.,” the oxidation of alcs./olefins was carried out in aqueous solution by using nanocomposites, p (NIPAM-co-VIm) and Q-p (NIPAM-co-VIm). It was found that the catalytic activity of the metal nanocomposite can be modulated by the lower critical solution temperature (LCST) of particles. The catalyst showed improved catalytic activity above LCST. Quaternized composites showed higher catalytic activity than unquaternized counterparts, due to their high hydrophobicity, effective interactions between substrates and catalyst, and high flexibility. In addition, we demonstrated that the catalytic activity of the nanocomposites can be tuned by the volume phase transition within the hydrogel by using the catalytic reduction of 4-nitrophenol/nitrobenzene, NP/NB, as the hydrophilic/hydrophobic substrates model. For 4-NP, with an increase in temperature from 25°C to 35°C (<LCST), the apparent rate constant values had a downward trend. On the contrary, for NB, this value had an upward trend. These results revealed that different changes in rate constant for 4-NP and NB with temperature should be attributed to significant differences in NP/NB affinity to interact with Ag-NPs in the hydrogel. Moreover, the catalysts could efficiently be recycled four times without losing their quality. FT-IR spectra and at. absorption spectroscopy also proved that the catalysts were recyclable, durable, and leaching-resistant. In the experiment, the researchers used many compounds, for example, (4-Chlorophenyl)methanol (cas: 873-76-7Application of 873-76-7).

(4-Chlorophenyl)methanol (cas: 873-76-7) belongs to alcohols. Alkyl halides are often synthesized from alcohols, in effect substituting a halogen atom for the hydroxyl group. Tertiary alcohols cannot be oxidized at all without breaking carbon-carbon bonds, whereas primary alcohols can be oxidized to aldehydes or further oxidized to carboxylic acids.Application of 873-76-7

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Effect of pulse light on the quality of refrigerated (4°C) large yellow croaker (Pseudosciaena crocea) was written by Zhang, Jianyou;Zhou, Guangcheng;Ji, Shengqiang;Zou, Ligen;Liang, Jianqin;Walayat, Noman;Chen, Jiang;Fei, Lyu;Ding, Yuting. And the article was included in LWT–Food Science and Technology in 2022.Category: alcohols-buliding-blocks This article mentions the following:

This study mainly analyzed the changes of quality of large yellow croaker treated by pulsed light during storage at 4°C by studying TVC, TVB-N, TBARS, color, texture, sensory evaluation and volatile substances. The large yellow croaker was treated with different intensities (100, 200, 300, 400 and 500 J/pulse) of PL for 30 pulses. The results showed that the initial sterilization efficiency of 300 J/pulse PL group could reach to 86.27 ± 4.32%. And the TVB-N and TBARS increased at a slower rate in the 300 J/pulse group compared to the control group during storage. Furthermore, the L* and a* color parameters of 300 J/pulse group decreased more slowly than the control group. Besides that, the texture and the sensory evaluation score were also better than control group at the same storage time. The shelf life of large yellow croaker could be extended by 2-3 days after PL treatment. However, the 500 J/pulse PL group had increased lipid oxidation and resulted in some sulfur and metallic odor. To sum up, the PL technol. presented the potential effect to improve the shelf life of large yellow croaker, but it is necessary to further optimize the processing conditions of PL. In the experiment, the researchers used many compounds, for example, Oct-1-en-3-ol (cas: 3391-86-4Category: alcohols-buliding-blocks).

Oct-1-en-3-ol (cas: 3391-86-4) belongs to alcohols. Alkyl halides are often synthesized from alcohols, in effect substituting a halogen atom for the hydroxyl group. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts