Tag: 100-200

An asymmetric Salamo-based Zn complex supported on Fe₃O₄ MNPs: a novel heterogeneous nanocatalyst for the silyl protection and deprotection of alcohols under mild conditions was written by Yao, Hongyan;Wang, Yongsheng;Razi, Maryam Kargar. And the article was included in RSC Advances in 2021.Formula: C7H6Cl2O This article mentions the following:

A magnetic asym. Salamo-based Zn complex (H2L = salen type di-Schiff bases)-supported on the surface of modified Fe₃O₄ (Fe₃O₄@H₂L-Zn) as a new catalyst was designed and characterized via numerous anal. techniques such as FT-IR spectroscopy, XRD, EDS, ICP-AES, SEM, TEM, TGA and VSM. An efficient and sustainable synthetic protocol were presented for the synthesis of silyl ether substructures via the silyl protection of alcs. under mild conditions. The synthetic protocol involved a two-component solvent-free reaction between various hydroxyl-bearing substrates and hexamethyldisilazane (HMDS) as an inexpensive silylating agent using Fe₃O₄@H₂L-Zn MNPs as a magnetically separable, recyclable and reusable heterogeneous catalyst. Fe₃O₄@H2L-Zn MNPs were also applied for the removal of silyl protecting groups from hydroxyl functions using water in DCM under green conditions. The catalyst demonstrated good to excellent catalytic yield efficiency for both the reactions compared to the com. metal-based catalysts under green conditions for a wide range of substrates. In the experiment, the researchers used many compounds, for example, (2,4-Dichlorophenyl)methanol (cas: 1777-82-8Formula: C7H6Cl2O).

(2,4-Dichlorophenyl)methanol (cas: 1777-82-8) belongs to alcohols. The oxygen atom of the strongly polarized O―H bond of an alcohol pulls electron density away from the hydrogen atom. This polarized hydrogen, which bears a partial positive charge, can form a hydrogen bond with a pair of nonbonding electrons on another oxygen atom. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Formula: C7H6Cl2O

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Dopamine-decorated Ti₃C₂T_x MXene/cellulose nanofiber aerogels supported form-stable phase change composites with superior solar-thermal conversion efficiency and extremely high thermal storage density was written by Du, Xiaosheng;Wang, Jiuao;Jin, Linzhao;Deng, Sha;Dong, Yi;Lin, Shaojian. And the article was included in ACS Applied Materials & Interfaces in 2022.HPLC of Formula: 149-32-6 This article mentions the following:

The exploitation of from-stable phase change materials (PCMs) with superior energy storage capacity and excellent solar-thermal conversion performance is crucial for the efficient exploitation of solar energy. Herein, 2D-layered polymerized dopamine-decorated Ti₃C₂T_x MXene nanosheets (P-MXene) with superior photothermal effects and excellent oxidation stability were synthesized from Ti₃AlC₂ particles by the selective etching and self-polymerization of dopamine. Then, novel biomass-derived PCM composites, eMPCMs, were fabricated by impregnating erythritol into P-MXene/cellulose nanofiber (CNF) hybrid aerogels. The porous and interconnected 3D aerogels adequately support erythritol and resist liquid leakage during thermal storage. Differential scanning calorimetry (DSC) results showed that the eMPCMs based on P-MXene/CNF aerogels exhibited an extremely high thermal storage d. (325.4-330.6 J/g) and excellent PCM loading capacity (up to 1929%). The introduction of P-MXene nanosheets into eMPCMs significantly increased the solar-thermal conversion and storage efficiency, solar-thermal-electricity conversion capacity, and thermal conductivity of the synthesized PCM composites. Moreover, the P-MXene/CNF hybrid aerogel-based PCM composites possessed excellent long-term thermal reliability and thermostability. Hence, the synthesized eMPCMs reveal tremendous potential for efficient solar-thermal storage fields. In the experiment, the researchers used many compounds, for example, (2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6HPLC of Formula: 149-32-6).

(2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6) 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.HPLC of Formula: 149-32-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis and Characterization of Conjugated Mono- and Dithiol Oligomers and Characterization of Their Self-Assembled Monolayers was written by de Boer, Bert;Meng, Hong;Perepichka, Dmitrii F.;Zheng, Jie;Frank, Martin M.;Chabal, Yves J.;Bao, Zhenan. And the article was included in Langmuir in 2003.Recommanded Product: Sodium 2-methyl-2-propanethiolate This article mentions the following:

The characterization of self-assembled monolayer mol. arrays, which serve as active layers in electronic devices, is an important step toward understanding mol.-scale electronics. To correlate the properties of self-assembled monolayers with their mol. structures, π-conjugated mono- and dithiols and aromatic dithiols with an O or S atom between two aromatic units were designed and synthesized. Their optical properties were determined by UV-visible spectroscopy. Their self-assembled monolayer films on Au surfaces were characterized by cyclic voltammetry, grazing incidence FTIR spectroscopy (GI-FTIR), and contact angle and ellipsometry measurements. Increasing the chain length from two to four Ph rings showed a more than linear increase of the intensity of the aromatic C:C ring stretch modes in GI-FTIR, indicating that the longer p-phenylene system is oriented toward the surface normal. Similar to oligophenylenes, when the number of repeat units for oligothiophene is increased, a more than linear increase of the intensity of the C:C stretch and C-H bend modes implies that the longest oligothiophenedithiol mol. is oriented close to the surface normal. Ellipsometry showed a smaller deviation from the calculated monolayer thickness with increasing number of thiophene or phenylene rings, corroborating the GI-FTIR data. The conjugated phenylene- and thiophene-based dithiols demonstrate a less tilted mol. orientation with respect to the surface normal with increasing chain length. In the experiment, the researchers used many compounds, for example, Sodium 2-methyl-2-propanethiolate (cas: 29364-29-2Recommanded Product: Sodium 2-methyl-2-propanethiolate).

Sodium 2-methyl-2-propanethiolate (cas: 29364-29-2) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. 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.Recommanded Product: Sodium 2-methyl-2-propanethiolate

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis and evaluation of glycosyl donors with novel leaving groups for transglycosylations employing β-galactosidase from bovine testes was written by Kroeger, Lars;Thiem, Joachim. And the article was included in Carbohydrate Research in 2007.Product Details of 60463-12-9 This article mentions the following:

Novel aryl β-D-galactopyranosides were synthesized employing phase-transfer catalysis, and assayed as potential galactose donors in the presence of β-galactosidase from bovine testes using pNP-Gal as a reference The aglycons were represented mainly by nitrophenols containing halogens, hydroxymethyl, aldehyde, carboxyl, ester or amino functions. An unusual intermol. acetyl migration onto the benzylic alc. group was observed during galactosylation of hydroxymethylnitrophenols. Pyridyl glycosides were obtained by reaction with the corresponding silver pyridinolates. Glycosides of halo-, hydroxymethyl- or methoxycarbonyl-nitrophenols as leaving groups gave virtually the same yields of transglycosylation products. A minor increase was achieved with nitrosalicylaldehyde as leaving group, whereas carboxy or amino derivatives gave very low or no yield of the transglycosylation product. Com. available donors such as resorufinyl and 4-methylumbelliferyl β-D-galactopyranosides exhibited a lower transglycosylation potential than these novel pNP-Gal derivatives In the experiment, the researchers used many compounds, for example, 3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9Product Details of 60463-12-9).

3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9) 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.Product Details of 60463-12-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

C-H Alkenylation of Heteroarenes: Mechanism, Rate, and Selectivity Changes Enabled by Thioether Ligands was written by Gorsline, Bradley J.;Wang, Long;Ren, Peng;Carrow, Brad P.. And the article was included in Journal of the American Chemical Society in 2017.COA of Formula: C9H17NO3 This article mentions the following:

Thioether ancillary ligands have been identified that can greatly accelerate the C-H alkenylation of O-, S-, and N-heteroarenes. Kinetic data suggest thioether-Pd-catalyzed reactions can be as much as 800× faster than classic ligandless systems. Furthermore, mechanistic studies revealed C-H bond cleavage as the turnover-limiting step, and that rate acceleration upon thioether coordination is correlated to a change from a neutral to a cationic pathway for this key step. The formation of a cationic, low-coordinate catalytic intermediate in these reactions may also account for unusual catalyst-controlled site selectivity wherein C-H alkenylation of five-atom heteroarenes can occur under electronic control with thioether ligands even when this necessarily involves reaction at a more hindered C-H bond. The thioether effect also enables short reaction times under mild conditions for many O-, S-, and N-heteroarenes (55 examples), including examples of late-stage drug derivatization. In the experiment, the researchers used many compounds, for example, 1-Boc-Azetidine-3-yl-methanol (cas: 142253-56-3COA of Formula: C9H17NO3).

1-Boc-Azetidine-3-yl-methanol (cas: 142253-56-3) 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. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.COA of Formula: C9H17NO3

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

GC-MS fingerprint of volatile oil from Artemisia argyi was written by Wan, Lijuan;Lu, Jinqing;Guo, Shengnan. And the article was included in Medicinal Plant in 2016.Application of 2451-01-6 This article mentions the following:

[Objective] To establish the GC-MS fingerprints for Artemisia argyi volatile oil as a basis for the identification and quality of Artemisia argyi volatile oil evaluation. [Methods] 15 batches of Artemisia argyi samples were collected, and different batches of Artemisia argyi volatile oil was extracted by steam distillation And the temperature at feed inlet was 230 °, the carrier gas was nitrogen, and the carrier gas flow rate was 0.8 mL/min. GC-MS of volatile oil in 15 batches of Artemisia argyi was analyzed by temperature programmer. The GC-MS fingerprint was established and fingerprint similarity was analyzed. [Results] P-cymene, eucalyptol, terpene alkene, thujone, camphor, borneol, 1-caryophyllene, caryophyllene oxide and other 23 characteristic components were calibrated as common characteristic peaks to establish Artemisia argyi GC-MS fingerprint. The relative retention time and RSD of relative peak of total peak had smaller differences, and 15 batches of Artemisia argyi volatile oil similarity was greater than 0.90. [Conclusions]The study established the GC-MS fingerprint of Artemisia argyi volatile oil and determined 23 characteristic peaks of Artemisia argyi volatile components, which improved Artemisia argyi essential oil quality evaluation and control system, and provided overall objective exptl. evaluation for Artemisia argyi quality. In the experiment, the researchers used many compounds, for example, rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate (cas: 2451-01-6Application of 2451-01-6).

rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate (cas: 2451-01-6) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Application of 2451-01-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis of photocleavable poly(methyl methacrylate-block-D-lactide) via atom-transfer radical polymerization and ring-opening polymerization was written by Li, Hong;Rathi, Sahas;Sterner, Elizabeth S.;Zhao, Hui;Hsu, Shaw Ling;Theato, Patrick;Zhang, Yongming;Coughlin, E. Bryan. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2013.SDS of cas: 60463-12-9 This article mentions the following:

The synthesis and characterization of a photocleavable block copolymer containing an ortho-nitrobenzyl (ONB) linker between poly(Me methacrylate) and poly(D-lactide) blocks is presented here. The block copolymers were synthesized via atom transfer radical polymerization (ATRP) of MMA followed by ring-opening polymerization (ROP) of D-Lactide and ROP of D-lactide followed by ATRP of MMA from a difunctional photoresponsive ONB initiator, resp. The challenges and limitations during synthesis of the photocleavable block copolymers using the difunctional photoresponsive ONB initiator are discussed. The photocleavage of the copolymers occurs under mild conditions by simple irradiation with 302 nm wavelength UV light (Relative intensity at 7.6 cm: 1500 μW/cm²) for several hours. In the experiment, the researchers used many compounds, for example, 3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9SDS of cas: 60463-12-9).

3-(Hydroxymethyl)-4-nitrophenol (cas: 60463-12-9) 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: 60463-12-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Characterization of key odor-active compounds in thermal reaction beef flavoring by SGCxGC-O-MS, AEDA, DHDA, OAV and quantitative measurements was written by Wang, Haili;Yang, Ping;Liu, Chen;Song, Huanlu;Pan, Wenqing;Gong, Lin. And the article was included in Journal of Food Composition and Analysis in 2022.Application In Synthesis of Oct-1-en-3-ol This article mentions the following:

Thermal reaction beef flavoring is a kind of food additive. In this study, three extraction methods of dynamic headspace sampling (DHS), solid phase micro-extraction (SPME) and liquid-liquid extraction (LLE) combined with switchable two-dimensional gas chromatog.-olfactometry-mass spectrometry (SGCxGC-O-MS) were employed to characterize volatile compounds in thermal reaction beef flavoring. The odor characteristics of thermal reaction beef flavors were identified by sensory evaluation, aroma extraction dilution anal. (AEDA), dynamic headspace dilution anal. (DHDA), odor activity value (OAV) and quant. measurements. A total of 231 volatile odor compounds were identified by the three extraction methods, which including 15 aldehydes, 41 ketones, 29 alcs., 27 esters, 13 furans, 20 pyrazines, 9 sulfur-containing compounds, 18 thiophenes and thiazoles, 19 acids and 40 other compounds Ninety-eight compounds had odor activity, and 22 odor-active compounds were quant. analyzed. 2-Methyl-3-furanthiol (meaty) and bis(2-methyl-3-furanyl) disulfide (onion) had the higher FD and OAV, 3-methylbutanal (chocolate) was first identified as the key odor-active compound in thermal reaction beef flavoring, Me furfuryl disulfide (meaty), 2-ethyl-3,5-dimethylpyrazine (roasted nuts), 2,3-butanedione (caramel), linalool (floral), furfural (baked bread), 2-furfurylthiol (sulfury) and other compounds were also identified as the key aroma components in thermal reaction beef flavoring. The results showed that SPME and DHS were more suitable than LLE for the separation and extraction of volatile odor compounds in thermal reaction beef flavoring, and there were some masking and synergistic effects between odor-active compounds In the experiment, the researchers used many compounds, for example, Oct-1-en-3-ol (cas: 3391-86-4Application In Synthesis of Oct-1-en-3-ol).

Oct-1-en-3-ol (cas: 3391-86-4) 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. 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 In Synthesis of Oct-1-en-3-ol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

The Highly Effective Cobalt Based Metal-Organic Frameworks Catalyst for One Pot Oxidative Esterification Under Mild Conditions was written by Mekrattanachai, Pagasukon;Zhu, Lei;Setthaya, Naruemon;Chindawong, Chakkresit;Song, Wei Guo. And the article was included in Catalysis Letters in 2022.HPLC of Formula: 873-76-7 This article mentions the following:

The cobalt-based metal organic frameworks (Co-MOFs) catalystwas prepared with using terephthalic acid and 4,4′-bipyridine as organic linkers by facile solvothermal method for one-pot oxidative esterification. The prepared catalyst was pyrolyzed at different temperature and then applied for oxidation of aldehyde using mol. oxygen as benign oxidant under mild conditions. The Co-MOFs pyrolyzed at 800 C (denoted as Co-MOFs-800) catalyst exhibited excellent catalytic activity, selectivity and recyclability toward the oxidative esterification of benzaldehydes. Furthermore, it was reused up to 5 runs without significant loss of activity. In the experiment, the researchers used many compounds, for example, (4-Chlorophenyl)methanol (cas: 873-76-7HPLC of Formula: 873-76-7).

(4-Chlorophenyl)methanol (cas: 873-76-7) 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. 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.HPLC of Formula: 873-76-7

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Oxidative Kinetic Resolution of Aromatic Alcohols Using Iron Nanoparticles was written by Sonnenberg, Jessica F.;Pichugin, Dmitry;Coombs, Neil;Morris, Robert H.. And the article was included in Topics in Catalysis in 2013.HPLC of Formula: 120121-01-9 This article mentions the following:

Using the transfer hydrogenation (TH) pre-catalyst trans-(R,R)[Fe(NCMe)CO(PPh₂C₆H₄CH = NCHPh-)₂][BF₄]₂ (1) the authors studied the reverse reaction, oxidative kinetic resolution, and were able to achieve turn-over frequencies up to 335 h^-1 and s-values in favor of the (R)-alc. up to 10.2. Using racemic 1-phenylethanol the authors optimized reaction conditions to maximize enantioselectivity and turn-over frequency (TOF) and studied the effect of different proton/hydride acceptors, temperatures, and bases. Using KOCMe₃ as the base and benzophenone in THF as the solvent and acceptor at 45°, the authors tested substrates with varying electronic and steric factors. By increasing the steric bulk at the alc., the enantioselectivity increased, however the TOF decreased dramatically. Varying the electronics of the substrates using electron withdrawing and donating substituents showed a less significant effect. Probably the active species in catalysis is zero-valent iron nanoparticles (Fe NPs), a postulate that the authors support with microscopy imaging, sub-stoichiometric poisoning experiments, and anal. of the reaction profile. Further support is given in terms of a polymer-supported substrate experiment whereby the active species in catalysis is too large to permeate the pores of a functionalized polymer. Probably this is the 1st reported example of using a nanoparticle surface for oxidative kinetic resolution In the experiment, the researchers used many compounds, for example, (R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9HPLC of Formula: 120121-01-9).

(R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9) 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. Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions. Oxidation of organic compounds generally increases the number of bonds from carbon to oxygen (or another electronegative element, such as a halogen), and it may decrease the number of bonds to hydrogen.HPLC of Formula: 120121-01-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts