Tag: M.W=100-200

Synthetic Route of C9H11Cu. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Structures of Lithium Ferrocenylenecuprates and Their Oxidative Coupling Reactions. Author is Bomparola, Roberta; Davies, Robert P.; Gray, Tracey; White, Andrew J. P..

Li ferrocenylenecuprate was prepared from the treatment of ferrocene with butyllithium and Cu(I) mesityl. Depending upon the choice of base (BuLi/tmeda or tBuLi), one of two different cuprate complexes was obtained, both of which were characterized using x-ray crystallog. to reveal unique trimetallic clusters. Li ferrocenylenecuprate is shown to undergo oxidative coupling to give poly-1,1′-ferrocenylene.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Category: iodides-buliding-blocks. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Asymmetric reductive amination of carbonyl compounds by using N,N,N-tributylpropanaminium based novel chiral ionic liquid. Author is Rupini, Boyina; Pasricha, Sharda; Rathi, Brijesh.

Asym. reductive amination of carbonyl compounds was carried out using a novel class of aliphatic quaternary ammonium based chiral ionic liquid (R)-2,3-dihydroxy-N,N,N-tributylpropanaminum bromide chiral ionic liquid was synthesized, characterized and used for asym. reductive amination of carbonyl compounds in the presence of sodium borohydride. These preliminary results are encouraging and advocate dual role of novel ionic liquid as a medium and reducing agent for proficient conversion of ketones to amines, however, reductive amination reaction needs to be established for other substituents.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Mesitylcopper(I)( cas:75732-01-3 ) is researched.HPLC of Formula: 75732-01-3.Keen, Alana L.; Doster, Meghan; Han, Hua; Johnson, Samuel A. published the article 《Facile assembly of a Cu9 amido complex: a new tripodal ligand design that promotes transition metal cluster formation》 about this compound( cas:75732-01-3 ) in Chemical Communications (Cambridge, United Kingdom). Keywords: amidophosphine tripodal ligand preparation luminescence reaction mesitylcopper; copper amido nonanuclear complex preparation structure fluxionality; crystal structure nonanuclear copper amidophosphine complex; mol structure nonanuclear copper amidophosphine complex. Let’s learn more about this compound (cas:75732-01-3).

A tripodal amido ligand, [P(CH2NArCF3)3]H3 (ArCF3 = C6H3-3,5-(CF3)2), with a central non-chelating phosphorus donor allows for the facile assembly of a pentane soluble organometallic copper cluster, [P(CH2NArCF3)3]2Cu9(μ-2,4,6-Me3C6H2)3, with a central copper atom surrounded by a nonplanar chain of eight copper atoms and two terminal amido-copper bonds.

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Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Solid Phase Behavior, Polymorphism, and Crystal Structure Features of Chiral Drug Metaxalone.Application of 60827-45-4.

In addition to the previously known A-rac and B-rac polymorphs of the chiral drug metaxalone 1, an enantiopure A-(S)-form was obtained and studied. According to x-ray anal., the crystalline organization of this form is close to the A-rac-1 polymorph. Crystallization of metaxalone melts is accompanied by the formation of a previously unknown metastable C-phase, which in the case of both racemic and enantiomeric samples are transformed into A-rac-1 or A-(S)-1. Anal. of the PXRD and IR spectra of crystalline samples revealed a similarity of the internal structure for the A-(S)-1, A-rac-1, C-(S)-1, and C-rac-1 crystalline forms and the essential difference of all of these phases from the B-rac-1 phase. According to the thermochem. data, the dependences of the change in the Gibbs free energy for all the phases studied are plotted in the interval from the m.p. to 20°. Under standard conditions, the crystalline modifications of metaxalone, relative to ΔG0, form such a series: B-rac-1 < A-(S)-1 ≈ A-rac-1 < C-rac-1 < C-(S)-1. A model that describes all the exptl. revealed features of metaxalone crystallization is proposed. This literature about this compound(60827-45-4)Application of 60827-45-4has given us a lot of inspiration, and I hope that the research on this compound((2S)-(+)-3-Chloropropane-1,2-diol) can be further advanced. Maybe we can get more compounds in a similar way.

Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Application of 75732-01-3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Conjugated alternating copolymers with 4,4′-dimesitylboryl-2,2′-bithiophene as a building block. Author is Li, Haiyan; Jakle, Frieder.

The functionalization of polythiophene with dimesitylborane π-acceptor groups has a strong effect on the conjugated polymer backbone, resulting in interesting optical and electronic properties. To investigate the interplay between the electron-deficient organoborane substituents and the conjugated polymer main chain, a series of alternating copolymers was prepared Several aromatic building blocks that are commonly used in organic semiconductors, i.e. fluorene, carbazole, and triphenylamine, were chosen as comonomers for combination with 4,4′-diboryl-2,2′-bithiophene units. First, the trimethylsilyl-substituted copolymers PFT-Si, PCT-Si, and PTT-Si were prepared via standard Suzuki coupling reaction of 5,5′-diiodo-4,4′-bis(trimethylsilyl)-2,2′-bithiophene and the resp. pinacolborane-functionalized aromatic comonomer. Subsequent post-polymerization modification reactions, which involved treatment with BBr3 and then mesitylcopper, led to three borylated copolymers, PFT-B, PCT-B, and PTT-B. The ds.p. (DPn) and the polydispersities are consistent with those of the silylated precursor polymers. The photophys. and electrochem. properties of these new polymers have been studied in detail.

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Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Insight into polyacrylonitrile molecular structure from calculated vibrational frequencies and infrared intensities of model oligomers, published in 1994-11-01, which mentions a compound: 4553-62-2, mainly applied to polyacrylonitrile mol vibration model oligomer; IR intensity polyacrylonitrile mol vibration, SDS of cas: 4553-62-2.

RHF/3-21G vibrational frequencies and intensities are calculated for acrylonitrile dimers (S-2-methylglutaronitrile) and pentamers differing by their conformation and/or configuration to comprehend the influence of these 2 structural characteristics on the IR spectra of polyacrylonitrile chains. The isotactic pentamer tends to adopt a (TG)3 helix while for the syndiotactic configuration, 2 conformations of similar total energy are obtained. On the basis of these structures, it is found that the calculated IR spectra follow the reported exptl. trends. Of particular interest is the theor. verification of the exptl. observation made by M. Minagawa et al. (1988) that the intensity ratio between bands at 1230 and 1250 cm-1 depends on the stereochem. structure of polyacrylonitrile and provides a measure of their isotacticity percentage.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Pike, Sebastian D.; Garcia-Trenco, Andres; White, Edward R.; Leung, Alice H. M.; Weiner, Jonathan; Shaffer, Milo S. P.; Williams, Charlotte K. published the article 《Colloidal Cu/ZnO catalysts for the hydrogenation of carbon dioxide to methanol: investigating catalyst preparation and ligand effects》. Keywords: carbon dioxide hydrogenation methanol copper zinc oxide catalyst ligand.They researched the compound: Mesitylcopper(I)( cas:75732-01-3 ).Quality Control of Mesitylcopper(I). Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:75732-01-3) here.

The production of methanol from CO2 hydrogenation is a promising potential route to a renewable liquid fuel and renewable energy vector. Herein, three distinct routes to make colloidal catalysts based on mixtures of Cu(0) and ZnO nanoparticles (NPs) and using low-temperature organometallic procedures are reported. The colloids are surface coordinated by a phosphinate ligand: dioctylphosphinate ([DOPA]-), which delivers a high solubility in organic solvents. Further, the synthetic routes allow fine control of the ZnO:Cu and ligand loadings. The catalysts are prepared by mixing small NPs (2 nm) of either Cu(0) or air-stable Cu2O NPs with ZnO NPs (3 nm), or by the synthesis of Cu(0) in presence of ZnO NPs (ZnO: 2 nm, Cu: 6 nm). The resulting colloidal catalysts are applied in the liquid phase hydrogenation of CO2 to methanol (210°, 50 bar, 3 : 1 molar ratio of CO2 : H2). The catalysts typically exhibit 3 times higher rates when compared to a heterogeneous Cu-ZnO-Al2O3 com. catalyst (21 vs. 7 mmolMeOH gCuZnO-1 h-1). The characterization of the post-catalysis colloids show clear Cu/ZnO interfaces (HR-TEM), which are formed under reducing conditions, as well as differences in the Cu(0) NP size (from 3 to 7 nm) and nanoscale restructuring of the catalysts. The combination of characterization and catalytic results indicate that the activity is mostly dictated by the Cu(0) particle size and ligand loading. Smaller Cu(0) NPs exhibited lower turnover frequency (TOF) values, whereas higher ligand loadings ([DOPA]-:(Cu + Zn) of 0.2-1.1) lead to smaller Cu(0) NPs and reduce the formation of Cu/ZnO interfaces. UV-vis spectroscopy reveals that the Cu(0) NPs are more stable to oxidation under air after catalysis than beforehand, potentially due to migration of ZnO onto the Cu surface while under catalytic conditions.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Dimeric Copper and Lithium Thiolates: Comparison of Copper Thiolates with Their Lithium Congeners, the main research direction is copper lithium thiolate dimeric complex preparation; crystal structure copper lithium thiolate dimeric complex.SDS of cas: 75732-01-3.

The direct reactions of the large terphenyl thiols HSAriPr4 (AriPr4 = -C6H3-2,6-(C6H3-2,6-iPr2)2) and HSAriPr6 (AriPr6 = -C6H3-2,6-(C6H2-2,4,6-iPr3)2) with stoichiometric amounts of mesitylcopper(I) in THF at ca. 80°C afforded the first well-characterized dimeric copper thiolato species {CuSAriPr4}2 (1) and {CuSAriPr6}2 (2) with elimination of mesitylene. The complexes 1 and 2 were characterized by NMR and electronic spectroscopy as well as by X-ray crystallog. They have dimeric Cu2S2 core structures in which the two copper atoms are bridged by the sulfurs from the thiolato ligands and feature short Cu…Cu distances near 2.4 Å as well as a weak copper-flanking aryl ring interaction from a terphenyl substituent. The structures of the planar Cu2S2 cores bear a resemblance to the Cu-A site in nitrous oxide reductase in which two cysteines also bridge two copper atoms. The related dimeric Li2S2 structural motif was also observed in the lithium congeners {LiSAriPr4}2 (3) and {LiSAriPr6}2 (4) which were synthesized directly from the thiols and n-BuLi in hexanes. However, despite the very similar effective ionic radii of the Li+ (0.59 Å) and Cu+ (0.60 Å) ions, the Li…Li structures display very much longer (by more than ca. 0.5 Å) separations than the corresponding Cu…Cu distances in 1 and 2, which may be due to weaker dispersion interactions.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Quality Control of (2S)-(+)-3-Chloropropane-1,2-diol. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about A novel method for synthesis of L- and D-glycerol acetonide.

A novel efficient method for preparation. L- and D-glycerol acetonide is described. Highly enantioenriched (S)-epichlorohydrin and (R)-3-chloro-1,2-propanediol were simultaneously prepared by hydrolysis and resolution of racemic epichlorohydrin in presence of a chiral (R,R)-Salen-CoIII complex. (S)-epichlorohydrin was then used to afford L-glycerol acetonide in overall yield of 59.4 % by hydrolysis, condensation with acetone, substitution (acetylation), and alcoholysis. D-glycerol acetonide was prepared from (R)-3-chloro-1,2-propanediol in overall yield of 62.5 %. The chem. structures of the target compounds were confirmed by IR, 1H NMR and MS.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Computed Properties of C9H11Cu. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Direct Catalytic Asymmetric Aldol Reaction of an α-Azido Amide. Author is Weidner, Karin; Sun, Zhongdong; Kumagai, Naoya; Shibasaki, Masakatsu.

α-Azido 7-azaindolinylamide I underwent diastereoselective and enantioselective aldol additions to ortho-substituted aryl aldehydes 2-RC6H4CHO (R = F3C, Br, I, O2N, PhCC, F) in the presence of mesitylcopper and either a nonracemic bis(diphenylphospholanyl)ethane or a nonracemic bis(diarylphosphino)binaphthalene ligand to yield either nonracemic syn- or anti-α-azido-β-hydroxy acyl 7-azaindolinylamides such as II (R = F3C, Br, I, O2N, PhCC, F; R1 = N3, H; R2 = H, N3) in 74-98% yields, 53:47->98:2 dr, and 89-99% ee. Aromatic aldehydes lacking ortho substituents underwent diastereoselective and enantioselective aldol addition reactions with I to yield syn-α-azido-β-hydroxy amides only. Alkynals underwent diastereoselective and enantioselective aldol addition reactions with I to yield anti-α-azido-β-hydroxy amides; aldol addition of I to hydrocinnamaldehyde gave product with no diastereo- or enantioselectivity. II (R = F3C; R1 = N3; R2 = H) was converted to the corresponding nonracemic α-azido-β-hydroxy carboxylic acid and Me carboxylate and to a nonracemic 3-aryl-2-aziridinecarboxylic acid; the 7-azaindoline byproduct could be recovered. The structures of II (R = F3C, PhCC; R1 = N3; R2 = H), an aziridine derived from II (R = F3C; R1 = N3; R2 = H), and the tert-Bu carbonate ester of a racemic anti-α-azido-β-hydroxy 7-azaindolinylamide derived from 3-(4-fluorophenyl)-2-propynal were determined by X-ray crystallog.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com