Tag: 100-200

Ruthenium(II)-Catalyzed Asymmetric Transfer Hydrogenation Using Unsymmetrical Vicinal Diamine-Based Ligands: Dramatic Substituent Effect on Catalyst Efficiency was written by Zhang, Bo;Wang, Hui;Lin, Guo-Qiang;Xu, Ming-Hua. And the article was included in European Journal of Organic Chemistry in 2011.Application of 120121-01-9 This article mentions the following:

The use of unsym. vicinal diamines as ligands for Ru-catalyzed asym. transfer hydrogenation is described. With a SmI₂-mediated cross-coupling protocol, a series of enantiomerically pure unsym. vicinal diamines were readily prepared and examined in the asym. transfer hydrogenation. It was found that an aromatic substituent on the carbon bearing the -NHTs group and a bulky alkyl substituent on the other side, are both very important for the effectiveness of the ligand, suggesting that the substituent has a dramatic effect on the catalyst efficiency. With ligand I, excellent enantioselectivities that are comparable to N-tosyl-1,2-diphenylethane-1,2-diamine (TsDPEN) were achieved. The results provide some helpful information on the mechanism of Ru-catalyzed asym. transfer hydrogenation. In the experiment, the researchers used many compounds, for example, (R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9Application of 120121-01-9).

(R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9) belongs to alcohols. The oxygen atom of the strongly polarized O鈥旽 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. 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.Application of 120121-01-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Effect of synthesis conditions on the non-uniformity of nanofiltration membrane pore size distribution was written by Zhang, Ting;Fu, Ruo-Yu;Wang, Kun-Peng;Gao, Ya-Wei;Li, Hong-Rui;Wang, Xiao-Mao;Xie, Yuefeng F.;Hou, Li’an. And the article was included in Journal of Membrane Science in 2022.SDS of cas: 149-32-6 This article mentions the following:

The uniformity of membrane pore sizes, which is essentially determined by the membrane synthesis conditions, significantly affects the rejection performance of nanofiltration (NF) membranes. In this study, we applied two modeling methods, i.e., the DSPM (Donnan Steric Pore Model) and the log-normal distribution methods, for the determination of the average membrane pore size and pore size uniformity of lab-made NF membranes. The synthesis conditions included concentration of monomers (e.g., piperazine and trimesoyl chloride), (thermal) curing temperature and time, and activation solvent type and duration. Results showed that both high piperazine (PIP) concentration (鈮?.5 wt%) and curing temperature (鈮?0掳C) could enhance the membrane pore size uniformity. Although the average membrane pore size calculated by the DSPM method was higher than that by the log-normal distribution method, they significantly correlated. It appears that the log-normal distribution method could more directly characterize membrane pore size uniformity. Obviously, the pore uniformity of NF membranes affected the rejection of small mols., such as trace organic compounds These insights provided a theor. foundation for the characterization of membrane pore size distribution with more accuracy and the fabrication of membranes with higher pore size uniformity. 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. 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.SDS of cas: 149-32-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Physical constants of substituted acetophenones was written by Guzman-Lopez, Enrique;Rosas, Noe;Walls, Fernando. And the article was included in Boletin del Instituto de Quimica de la Universidad Nacional Autonoma de Mexico in 1970.Quality Control of 2′,6′-Dihydroxy-4′-methylacetophenone This article mentions the following:

An attempt to prepare perezone and the 2 pipitzols gave a mixture of 2-(4-methyl-2,5-dimethoxyphenyl)-6-methyl-1,5-heptadiene and 2-(4-methyl-2,5-dimethoxyphenyl)-6-methyl-2,5-heptadiene, and 12 substituted acetophenones, and 5 related products. Their ir, uv, and NMR spectra were described. In the experiment, the researchers used many compounds, for example, 2′,6′-Dihydroxy-4′-methylacetophenone (cas: 1634-34-0Quality Control of 2′,6′-Dihydroxy-4′-methylacetophenone).

2′,6′-Dihydroxy-4′-methylacetophenone (cas: 1634-34-0) 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.Quality Control of 2′,6′-Dihydroxy-4′-methylacetophenone

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Manganese-Catalyzed Asymmetric Hydrosilylation of Aryl Ketones was written by Ma, Xiaochen;Zuo, Ziqing;Liu, Guixia;Huang, Zheng. And the article was included in ACS Omega in 2017.SDS of cas: 120121-01-9 This article mentions the following:

Nonracemic (oxazolinyl)pyridinylimine manganese complexes I (R = i-Pr, Ph₂CH; R¹ = H, Me; R² = PhCH₂, i-Pr, t-Bu) were prepared as catalysts for the enantioselective hydrosilylation of aralkyl ketones. In the presence of I (R = Ph₂CH; R¹ = Me; R² = t-Bu), aralkyl ketones such as 4-R³C₆H₄COMe (R³ = Cl, i-Bu, t-Bu, cyclohexyl, n-Pr, MeO, Br, I, H) with Ph₃SiH and NaBHEt₃ in toluene to yield nonracemic benzylic alcs. such as (R)-4-R³C₆H₄CH(OH)Me (R³ = Cl, i-Bu, t-Bu, cyclohexyl, n-Pr, MeO, Br, I, H) in 48-99% yields and 66:34-96.5:3.5 er. The structure of I路2 CH₂Cl₂ (R = Ph₂CH; R¹ = Me; R² = t-Bu) was determined by X-ray crystallog. In the experiment, the researchers used many compounds, for example, (R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9SDS of cas: 120121-01-9).

(R)-1-(3-Chlorophenyl)ethanol (cas: 120121-01-9) belongs to alcohols. Alkyl halides are often synthesized from alcohols, in effect substituting a halogen atom for the hydroxyl group. Secondary alcohols are easily oxidized without breaking carbon-carbon bonds only as far as the ketone stage. No further oxidation is seen except under very stringent conditions.SDS of cas: 120121-01-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Palladium-catalyzed Heck cyclization/carbonylation with formates: synthesis of azaindoline-3-acetates and furoazaindolines was written by Ye, Hao;Wu, Linhui;Zhang, Minrui;Jiang, Guomin;Dai, Hong;Wu, Xin-Xing. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2022.Application In Synthesis of Benzo[d][1,3]dioxol-4-ol This article mentions the following:

Herein a palladium-catalyzed domino cyclization/carbonylation to access ester-functionalized azaindolines, e.g., I applying formates, e.g., phenylformate as a convenient carbonyl source was reported. All four azaindoline isomers were constructed, exhibiting good functional group compatibility. On this basis, modifying the starting tether on the aminopyridine led to furoazaindolines, e.g., II via an intramol. reductive cyclization after the palladium-catalyzed process. In the experiment, the researchers used many compounds, for example, Benzo[d][1,3]dioxol-4-ol (cas: 69393-72-2Application In Synthesis of Benzo[d][1,3]dioxol-4-ol).

Benzo[d][1,3]dioxol-4-ol (cas: 69393-72-2) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Secondary alcohols are easily oxidized without breaking carbon-carbon bonds only as far as the ketone stage. No further oxidation is seen except under very stringent conditions.Application In Synthesis of Benzo[d][1,3]dioxol-4-ol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Strategy of solution process precursors for phase change memory was written by Hwang, Jeong Min;Lee, Ji Hun;Kim, Hyo-Suk;Park, Chan Woo;Yoo, Dagyum;Park, Bo Keun;Kim, Chang Gyoun;Chung, Taek-Mo. And the article was included in Polyhedron in 2020.Formula: C6H15NO This article mentions the following:

The relation between the steric hindrance of the alpha carbon substituent group of aminoalkoxy ligand and formation of germanium telluride (GeTe) and antimony telluride (Sb₂Te₃) was elucidated. Germanium and antimony precursors were prepared using aminoalkoxide-type bidentate ligands of different sizes such as dmampH, dmapH and dmaeH. These precursor materials were further treated with bis(trimethylsilyl)telluride in hexadecane through thermal reaction and studied with powder x-ray diffraction (pXRD) to compare the formation of germanium telluride (GeTe) and antimony telluride (Sb₂Te₃) alloys which are potential precursor materials for phase change random access memory devices. While the pXRD patterns of the thermal reaction materials of compounds 2 and 3 at 190掳 revealed a rhombohedral phase of GeTe and tellurium, compounds 5 and 6 at 190掳 showed a rhombohedral phase of Sb₂Te₃ and tellurium at this temperature Probably the formation of chalcogenide alloys was more favorable when relatively less bulk ligand was used. In the experiment, the researchers used many compounds, for example, 1-(Dimethylamino)-2-methylpropan-2-ol (cas: 14123-48-9Formula: C6H15NO).

1-(Dimethylamino)-2-methylpropan-2-ol (cas: 14123-48-9) 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. 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.Formula: C6H15NO

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Iridium-Catalyzed Branch-Selective and Enantioselective Hydroalkenylation of 伪-Olefins through C-H Cleavage of Enamides was written by Sun, Xin;Lin, En-Ze;Li, Bi-Jie. And the article was included in Journal of the American Chemical Society in 2022.Name: (1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol This article mentions the following:

Catalytic branch-selective hydrofunctionalization of feedstock 伪-olefins to form enantioenriched chiral compounds is a particularly attractive yet challenging transformation in asym. catalysis. Herein, an iridium-catalyzed asym. hydroalkenylation of 伪-olefins through directed C-H cleavage of enamides was reported. This atom-economical addition process is highly branch-selective and enantioselective, delivering trisubstituted alkenes with an allylic stereocenter. DFT calculations reveal the origin of regio- and enantioselectivity. In the experiment, the researchers used many compounds, for example, (1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol (cas: 2216-51-5Name: (1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol).

(1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol (cas: 2216-51-5) 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. 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.Name: (1R,2S,5R)-2-Isopropyl-5-methylcyclohexanol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis of Cu(II) aminoalkoxide complexes and their unusual thermolysis to Cu(0) was written by Park, Jung Woo;Jang, Hong Suk;Kim, Minchan;Sung, Kiwhan;Lee, Sun Sook;Chung, Taek-Mo;Koo, Sangman;Kim, Chang Gyoun;Kim, Yunsoo. And the article was included in Inorganic Chemistry Communications in 2004.Formula: C6H15NO This article mentions the following:

The F free Cu(II) aminoalkoxide complexes Cu(OCMe₂CH₂NR₂)₂ (R = Me(I), Et(II)) were synthesized and characterized as a low melting solid (I) and a viscous liquid (II). The complexes are thermally decomposed at <200掳 to produce metallic Cu by unusual 纬-H elimination reaction. In the experiment, the researchers used many compounds, for example, 1-(Dimethylamino)-2-methylpropan-2-ol (cas: 14123-48-9Formula: C6H15NO).

1-(Dimethylamino)-2-methylpropan-2-ol (cas: 14123-48-9) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. 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.Formula: C6H15NO

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Iron-Catalyzed 尾-Alkylation of Alcohols was written by Bettoni, Leo;Gaillard, Sylvain;Renaud, Jean-Luc. And the article was included in Organic Letters in 2019.Recommanded Product: 2-(4-(Trifluoromethyl)phenyl)ethanol This article mentions the following:

尾-Branched alkylated alcs. have been prepared in good yields using a double-hydrogen auto-transfer strategy in the presence of our diaminocyclopentadienone iron tricarbonyl complex Fe1. The alkylation of some 2-arylethanol derivatives was successfully addressed with benzylic alcs. and methanol as alkylating reagents under mild conditions. Deuterium labeling experiments suggested that both alcs. (2-arylethanol and either methanol or benzyl alc.) served as hydrogen donors in this cascade process. In the experiment, the researchers used many compounds, for example, 2-(4-(Trifluoromethyl)phenyl)ethanol (cas: 2968-93-6Recommanded Product: 2-(4-(Trifluoromethyl)phenyl)ethanol).

2-(4-(Trifluoromethyl)phenyl)ethanol (cas: 2968-93-6) 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. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Recommanded Product: 2-(4-(Trifluoromethyl)phenyl)ethanol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts