Tag: 200-300

[Lewis acid]⁺[Co(CO)₄]^– complexes: A versatile class of catalysts for carbonylative ring expansion of epoxides and aziridines was written by Mahadevan, Viswanath;Getzler, Yutan D. Y. L.;Coates, Geoffrey W.. And the article was included in Angewandte Chemie, International Edition in 2002.Quality Control of Trans-2-(benzylamino)cyclohexanol This article mentions the following:

Efficient carbonyl insertion into C-O and C-N bonds using [Lewis acid]-⁺[Co(CO)₄]^– complexes [Cp₂Ti(thf)₂][Co(CO)₄] 1 and [(salph)Al(thf)₂][Co(CO)₄] 2 [salph = N,N’-bis(3,5-di-tert-butylsalicylidene)phenylenediamine] gives regio- and stereoselective carbonylation of a variety of epoxides and aziridines to yield 尾-lactones and 尾-lactams, resp. Both transformations are proposed to occur by the same mechanism, yielding products with inversion of configuration at the site of CO insertion. In the experiment, the researchers used many compounds, for example, Trans-2-(benzylamino)cyclohexanol (cas: 40571-86-6Quality Control of Trans-2-(benzylamino)cyclohexanol).

Trans-2-(benzylamino)cyclohexanol (cas: 40571-86-6) belongs to alcohols. A strong base can deprotonate an alcohol to yield an alkoxide ion (R鈥昈鈭?. For example, sodamide (NaNH2), a very strong base, abstracts the hydrogen atom of an alcohol. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.Quality Control of Trans-2-(benzylamino)cyclohexanol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

An imidazolium-based ionene blended with crosslinked PEO as a novel polymer membrane for selective CO₂ separation was written by Kammakakam, Irshad;Rao, Anil H. N.;Yoon, Hee Wook;Nam, SangYong;Park, Ho Bum;Kim, Tae-Hyun. And the article was included in Macromolecular Research in 2014.Product Details of 4074-88-8 This article mentions the following:

A novel imidazolium-based ionene was mixed with a di(ethylene glycol) diacrylate that was subsequently photocrosslinked to form a blend membrane useful for CO₂/N₂ gas separation The crosslinked poly(ethylene oxide) (PEO) offered a mech. stable matrix with a high CO₂ affinity. The ionene loading affected both the structure and CO₂ separation performance of the blend membranes as demonstrated by varying the ionene content in three levels, 1:1, 2:1, and 3:1 (ionene:crosslinker) by weight The CO₂ solubility of the membrane dramatically increased with the ionene loading level, and a high CO₂/N₂ permselectivity of 33.5 was obtained for the [3II-cPEO][TFSI]. The imidazolium-based ionene blend membranes prepared with crosslinked PEO (II-cPEO) also displayed good thermal and mech. stability. In the experiment, the researchers used many compounds, for example, Diethyleneglycoldiacrylate (cas: 4074-88-8Product Details of 4074-88-8).

Diethyleneglycoldiacrylate (cas: 4074-88-8) 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. 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.Product Details of 4074-88-8

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Metabolomics insights into the mechanism by which Epichloe gansuensis endophyte increased Achnatherum inebrians tolerance to low nitrogen stress was written by Hou, Wenpeng;Wang, Jianfeng;Christensen, Michael J.;Liu, Jie;Zhang, Yongqiang;Liu, Yinglong;Cheng, Chen. And the article was included in Plant and Soil in 2021.Related Products of 10083-24-6 This article mentions the following:

Epichloe gansuensis increases the tolerance of host plants to abiotic stress. However, little is known about the mechanism by which E. gansuensis improves grass growth under low nitrogen availability stress. Achnatherum inebrians with E. gansuensis (E+) and without E. gansuensis (E-) were treated with modified 1/2 Hoagland containing 0.01 mM (low N) or 7.5 mM N (normal level) for 18 wk. After 18 wk of treatment with N, the dry weight of E+ and E- plants were measured, and the metabolomics anal. of leaves and roots grown under two different N concentrations was conducted with GS-MS to determine differential metabolites and metabolic pathways. E+ A. inebrians had higher dry weight of leaves and roots compared to the E- A. inebrians under low N stress. E. gansuensis increased the tolerance of A. inebrians to low N stress by its capability to increase the content of organic acids (salicylic acid and 3-hydroxypropionic acid) and glucose-6-phosphate in leaves, and E. gansuensis increased the content of fatty acids (linolenic acid and oleic acid) and amino acids (glycine and 4-aminobutyric acid) in roots under low N stress. Finally, E. gansuensis reprogramed the metabolic pathway of amino acids of host grasses to adapt to the different N concentration Our results reveal the chem. mechanism by which E. gansuensis enhances the tolerance of host grasses to low N, and provide the theor. basis for utilizing E. gansuensis, improving of grasses and crops, and for developing new germplasm for low-N tolerant grasses. In the experiment, the researchers used many compounds, for example, (E)-4-(3,5-Dihydroxystyryl)benzene-1,2-diol (cas: 10083-24-6Related Products of 10083-24-6).

(E)-4-(3,5-Dihydroxystyryl)benzene-1,2-diol (cas: 10083-24-6) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. 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.Related Products of 10083-24-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Use of Stille-type cross-coupling as a route to oligopyridylimines was written by Champouret, Yohan D. M.;Chaggar, Rajinder K.;Dadhiwala, Ishaq;Fawcett, John;Solan, Gregory A.. And the article was included in Tetrahedron in 2006.Related Products of 49669-14-9 This article mentions the following:

Tributylstannylpyridinyldioxolanes I (R = H, Me) are prepared; Stille coupling of I with bromopyridines in the presence of tetrakis(triphenylphosphine)palladium(0) followed by acid hydrolysis provides oligopyridinecarboxaldehydes and acetyloligopyridines such as II (R = H, Me) which are converted to arylimines such as III (R = H, Me; R¹ = Me₂CH). Lithiation of 2-(6-bromo-2-pyridinyl)-1,3-dioxolanes followed by alkylation with chlorotributylstannnane provides I (R = H, Me) in 88-92% yields. Stille coupling of I (R = H, Me) with bromopyridines such as 6,6′-dibromo-2,2′-bipyridine in the presence of tetrakis(triphenylphosphine)palladium(0) followed by hydrolysis with hydrochloric acid and neutralization provides oligopyridines such as quaterpyridines II (R = H, Me) in 45-80% yields; attempts to prepare a quinquepyridinedicarboxaldehyde by the same procedure yielded no isolable product because of the insolubility of the product formed upon deprotection. Aldehydes undergo condensation with 2,6-diisopropylaniline in ethanol in the presence of acetic acid to yield oligopyridineimines such as III (R = H; R¹ = Me₂CH), while acetyloligopyridines undergo condensation with 2,6-diisopropylaniline under solvent-free conditions at 160掳 in the presence of formic acid to yield imines such as III (R = Me; R¹ = Me₂CH). Crystal structures of III (R = H; R¹ = Me₂CH) and two other oligopyridylimines are determined by X-ray crystallog. In the experiment, the researchers used many compounds, for example, 2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9Related Products of 49669-14-9).

2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9) belongs to alcohols. Alkyl halides are often synthesized from alcohols, in effect substituting a halogen atom for the hydroxyl group. 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.Related Products of 49669-14-9

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis of a New Polydentate Ligand Obtained by Coupling 2,6-Bis(imino)pyridine and (Imino)pyridine Moieties and Its Use in Ethylene Oligomerization in Conjunction with Iron(II) and Cobalt(II) Bis-halides was written by Bianchini, Claudio;Giambastiani, Giuliano;Guerrero Rios, Itzel;Meli, Andrea;Oberhauser, Werner;Sorace, Lorenzo;Toti, Alessandro. And the article was included in Organometallics in 2007.Category: alcohols-buliding-blocks This article mentions the following:

In this paper are described the synthesis, characterization, and coordinating properties of a new potentially pentadentate nitrogen ligand, ^CyAr2N₅ (I), that combines in the same mol. structure 2,6-bis(imino)pyridine and (imino)pyridine moieties. This ligand reacts with 1 or 2 equiv of anhydrous MCl₂ (M = Fe, Co) to give paramagnetic mononuclear or homodinuclear complexes of the formula ^CyAr2N₅MCl₂ and ^CyAr2N₅M₂Cl₄. In the dinuclear complexes, one metal center is five-coordinate, while the other is four-coordinate. Ligand and metal complexes were characterized, both in the solid state and in solution, by a variety of techniques, including single-crystal x-ray diffraction analyses, magnetic susceptibility determinations, IR, visible-NIR, ¹H NMR, and X-band EPR spectroscopies. On activation by methylaluminoxane (MAO) in toluene, the Fe^II and Co^II complexes generate effective catalysts for the oligomerization of ethylene to 伪-olefins with productivities and Schulz-Flory parameters depending on the type and number of the coordinated metals. In an attempt to rationalize the surprisingly high activity of the Co^II precursors, and in particular that of the dinuclear derivative ^CyAr2N₅Co₂Cl₄, which is 4 times higher than that of the mononuclear analog ^CyAr2N₅CoCl₂, a Co^II complex was synthesized where the supporting ligand is sterically similar to ^CyAr2N₅, yet it contains only the three nitrogen donor atoms of the 2,6-bis(imino)pyridine moiety. All five nitrogen atoms of ^CyAr2N₅ play an active role under catalytic conditions, even when the precursor contains a free (imino)pyridine moiety. In the experiment, the researchers used many compounds, for example, 2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9Category: alcohols-buliding-blocks).

2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. 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.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Copper-Catalyzed B(dan)-Installing Allylic Borylation of Allylic Phosphates was written by Yoshida, Hiroto;Murashige, Yuya;Osaka, Itaru. And the article was included in Advanced Synthesis & Catalysis in 2019.Reference of 1214264-88-6 This article mentions the following:

纬-Selective B(dan)-installing allylic borylation was found to proceed efficaciously by the reaction of an unsym. diboron, (pin)B-B(dan), with allylic phosphates under copper catalysis. The resulting allyl-B(dan) was convertible into 1,3-, 1,2-, or 1,1-diborylalkanes with different boron-Lewis acidity by B(pin)-installing hydroboration, and its C(sp³)-B(dan) bond turned out to be preferentially transformed into a C(sp³)-N bond, leaving the B(pin) intact, despite its well-accepted inertness toward various transformations. In the experiment, the researchers used many compounds, for example, 2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-naphtho[1,8-de][1,3,2]diazaborinine (cas: 1214264-88-6Reference of 1214264-88-6).

2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-naphtho[1,8-de][1,3,2]diazaborinine (cas: 1214264-88-6) belongs to alcohols. A strong base can deprotonate an alcohol to yield an alkoxide ion (R鈥昈鈭?. For example, sodamide (NaNH2), a very strong base, abstracts the hydrogen atom of an alcohol. 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.Reference of 1214264-88-6

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Synthesis and Functionalization of Allenes by Direct Pd-Catalyzed Organolithium Cross-Coupling was written by Mateos-Gil, Jaime;Mondal, Anirban;Castineira Reis, Marta;Feringa, Ben L.. And the article was included in Angewandte Chemie, International Edition in 2020.Application In Synthesis of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane This article mentions the following:

A palladium-catalyzed cross-coupling between in situ generated allenyl/propargyl-lithium species and aryl bromides to yield highly functionalized allenes is reported. The direct and selective formation of allenic products preventing the corresponding isomeric propargylic product is accomplished by the choice of SPhos or XPhos based Pd catalysts. The methodol. avoids the prior transmetalation to other transition metals or reverse approaches that required prefunctionalization of substrates with leaving groups, resulting in a fast and efficient approach for the synthesis of tri- and tetrasubstituted allenes. Exptl. and theor. studies on the mechanism show catalyst control of selectivity in this allene formation. In the experiment, the researchers used many compounds, for example, 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4Application In Synthesis of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane).

2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 68716-49-4) 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. 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 In Synthesis of 2-(4-Bromophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Iridium(III) Complexes Bearing a Formal Tetradentate Coordination Chelate: Structural Properties and Phosphorescence Fine-Tuned by Ancillaries was written by Yuan, Yi;Gnanasekaran, Premkumar;Chen, Yu-Wen;Lee, Gene-Hsiang;Ni, Shao-Fei;Lee, Chun-Sing;Chi, Yun. And the article was included in Inorganic Chemistry in 2020.COA of Formula: C9H10BrNO2 This article mentions the following:

Synthesis of the multidentate coordinated chelate N3C-H₂, composed of a linked functional pyridyl pyrazole fragment plus a peripheral Ph and pyridyl unit, was obtained using a multistep protocol. Preparation of Ir(III) metal complexes bearing a N3C chelate in the tridentate (魏³), tetradentate (魏⁴), and pentadentate (魏⁵) modes was executed en route from two nonemissive dimer intermediates [Ir(魏³-N3CH)Cl₂]₂ (1) and [Ir(魏⁴-N3C)Cl]₂ (2). Next, a series of mononuclear Ir(III) complexes with the formulas [Ir(魏⁴-N3C)Cl(py)] (3), [Ir(魏⁴-N3C)Cl(dmap)] (4), [Ir(魏⁴-N3C)Cl(mpzH)] (5), and [Ir(魏⁴-N3C)Cl(dmpzH)] (6), as well as diiridium complexes [Ir₂(魏⁵-N3C)(mpz)₂(CO)(H)₂] (7) and [Ir₂(魏⁵-N3C)(dmpz)₂(CO)(H)₂] (8), were obtained upon treatment of dimer 2 with pyridine (py), 4-dimethylaminopyridine (dmap), 4-methylpyrazole (mpzH), and 3,5-dimethylpyrazole (dmpzH), resp. These Ir(III) metal complexes were identified using spectroscopic methods and by x-ray crystallog. anal. of representative derivatives 3, 5, and 7. Their photophys. and electrochem. properties were investigated and confirmed by the theor. simulations. Notably, green-emitting organic light-emitting diode (OLED) on the basis of Ir(III) complex 7 gives a maximum external quantum efficiency up to 25.1%. This result sheds light on the enormous potential of this tetradentate coordinated chelate in the development of highly efficient iridium complexes for OLED applications. Preparation of Ir(III) complexes bearing tailor-made multidentate N3C chelate are reported, from which a green-emitting OLED with a maximum EQE of 25.1% was successfully fabricated using diiridium complex 7. In the experiment, the researchers used many compounds, for example, 2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9COA of Formula: C9H10BrNO2).

2-Bromo-6-(2-methyl-1,3-dioxolan-2-yl)pyridine (cas: 49669-14-9) 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. 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.COA of Formula: C9H10BrNO2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hydrosilyl group-directed iridium-catalyzed peri-selective C-H borylation of ring-fused (hetero)arenes was written by Sumida, Yuto;Harada, Ryu;Sumida, Tomoe;Hashizume, Daisuke;Hosoya, Takamitsu. And the article was included in Chemistry Letters in 2018.COA of Formula: C16H20B2N2O2 This article mentions the following:

The iridium-catalyzed direct C-H borylation of ring-fused (hetero)arenes afforded borylated products in a peri-selective manner, directed by a proximal hydrosilyl group. Further selective transformations of the boryl and silyl groups enabled the synthesis of various multisubstituted (hetero)arenes, such as 1,8-disubstituted naphthalenes and 3,4-diarylindole. In the experiment, the researchers used many compounds, for example, 2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-naphtho[1,8-de][1,3,2]diazaborinine (cas: 1214264-88-6COA of Formula: C16H20B2N2O2).

2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-naphtho[1,8-de][1,3,2]diazaborinine (cas: 1214264-88-6) belongs to alcohols. Because alcohols are easily synthesized and easily transformed into other compounds, they serve as important intermediates in organic synthesis. 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.COA of Formula: C16H20B2N2O2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Regulation of mechanical properties of diene rubber cured by oxa-Michael Reaction via manipulating network structure was written by Zhang, Xuhui;Tang, Zhenghai;Guo, Baochun. And the article was included in Polymer in 2018.Recommanded Product: 4074-88-8 This article mentions the following:

As diene rubber products are generally fabricated with complicated curing package involving toxic additives, the exploration of alternative green curing chem. for diene rubber is of great importance. In this contribution, we demonstrate a curing chem. based on oxa-Michael reaction for diene rubber to achieve the combination of simple curing system and tunable mech. properties. Specifically, pendent hydroxyls are introduced onto the solution-polymerized styrene-butadiene rubber (SSBR) via thiol-ene click reaction and the modified SSBR is effectively cured by various acrylates without the use of any addnl. additives. The mech. behaviors of vulcanizates can be widely regulated by manipulating the network structures, which is tuned by curing temperature, hydroxyl content of SSBR, content and functionality of acrylates. The correlation between mech. properties and network structure is accordingly achieved, which provides essential basis for the future application of the diene rubbers cured by oxa-Michael reaction. In the experiment, the researchers used many compounds, for example, Diethyleneglycoldiacrylate (cas: 4074-88-8Recommanded Product: 4074-88-8).

Diethyleneglycoldiacrylate (cas: 4074-88-8) 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. Grignard and organolithium reagents are powerful tools for organic synthesis, and the most common products of their reactions are alcohols.Recommanded Product: 4074-88-8

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts