Tag: M.W=100-200

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.Hakansson, M.; Lopes, C.; Jagner, S. researched the compound: Mesitylcopper(I)( cas:75732-01-3 ).Name: Mesitylcopper(I).They published the article 《Copper(I) alkoxides: preparation and structural characterisation of triphenylmethoxocopper(I) and of an octanuclear form of t-butoxocopper(I)》 about this compound( cas:75732-01-3 ) in Inorganica Chimica Acta. Keywords: crystal structure copper butoxo triphenylmethoxo polynuclear; copper butoxo triphenylmethoxo polynuclear preparation structure; phenylmethoxo copper polynuclear preparation structure; butterfly copper butoxo preparation structure. We’ll tell you more about this compound (cas:75732-01-3).

Two Cu(I) alkoxides, the novel compound triphenylmethoxocopper(I) and an octanuclear form of t-butoxocopper(I), were prepared from mesitylcopper(I) and the relevant alc. [Cu4(OCPh3)4]·2C6H5CH3 (1) and [Cu8(OtBu)8] (2) were characterized by crystal structure determination Compound 1 contains two crystallog. independent triphenylmethoxocopper(I) mols., each with a planar Cu4 core. The Cu4O4 unit is butterfly-shaped with the O ligands situated alternately ∼0.4 A above and below the plane through the Cu atoms, and the triphenylmethyl groups spread out over both sides of the Cu4O4 core. The Cu(I) centers are two-coordinated with distances of 1.83(1)-1.86(1) A and O-Cu-O angles of 169.4(5)°. [Cu8(OtBu)8] (2) can be described as being composed of two approx. planar Cu4O4 cores, each with the t-Bu groups bent away in the same direction from the Cu4O4 plane. These units are related to one another by a center of symmetry and with weak Cu-O interactions of 2.493(5) and 2.536(5) A, involving four of the eight coppers, thus yielding an octanuclear Cu8O8 core. These four Cu(I) centers thus attain T-shaped three-coordination by O, whereas the remaining four are approx. linearly coordinated. The short Cu-O bond lengths in 2 range from 1.844(5) to 1.888(5) A.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Oligomers. XVI. Oligomers of acrylonitrile. II. Polymerization and degradation investigations》. Authors are Zahn, Helmut; Schafer, Paul.The article about the compound:2-Methylglutaronitrilecas:4553-62-2,SMILESS:N#CC(C)CCC#N).Safety of 2-Methylglutaronitrile. Through the article, more information about this compound (cas:4553-62-2) is conveyed.

cf. C.A. 53, 13993c. The polymerization of acrylonitrile with dodecyl mercaptan in the presence of pyridine resulted in a polymer of average mol. weight 950. From 170° on, melting oligomers with mol. weights from 280 were obtained by fractional precipitation Some HCN has been split off during thermal degradation of polyacrylonitrile. The liquid products formed at 550° were shown to be mainly nitriles which could be separated into 4 fractions. Acrylonitrile and a dimer could be found, the latter was identical with synthetic 1,3-dicyanobutane. 33 references.

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

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Why are the {Cu4N4} rings in copper(I) phosphinimide clusters [Cu{μ-N:PR3}]4 (R = NMe3 or Ph) planar?, published in 2015, which mentions a compound: 75732-01-3, Name is Mesitylcopper(I), Molecular C9H11Cu, HPLC of Formula: 75732-01-3.

The Cu phosphinimide complexes [Cu{μ-N:PR3}]4 (1, R = NMe2 and 2, R = Ph) were obtained in good yields from the reactions of Cu[Mes] (Mes = mesityl, C6H2Me3-2,4,6) with the corresponding iminophosphoranes, HNPR3. The mol. structures of 1 and 2 reveal planar eight-membered {Cu4N4} rings which contrasts with the saddle-shaped {M4N4} rings found in related metal phosphinimide complexes. According to computations, there is negligible aromaticity in the planar {Cu4N4} rings in 1 and 2 and the saddle shape observed in related {M4N4} rings is due to steric factors.

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

Oguadinma, Paul O.; Schaper, Frank published the article 《Bis(2-phenylethyl)-nacnac: A Chiral Diketiminate Ligand and Its Copper Complexes》. Keywords: copper chiral diiminopentane phosphine isonitrile pyridine preparation; crystal structure copper chiral diiminopentane phosphine aminopyridine isonitrile.They researched the compound: Mesitylcopper(I)( cas:75732-01-3 ).Product Details of 75732-01-3. 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 chiral diketiminate ligand bis-N,N’-(2-phenylethyl)-2,4-diiminopentane, 1H, was synthesized in good yields in a 1-step reaction from chiral amine and acetylacetone. Reaction of 1Li(THF) with N-bromosuccinimide yielded the succinimide-substituted ligand 2H. Cu complexes were obtained by reaction of the ligand with a basic Cu source in the presence of coordinating Lewis bases, and 1Cu(NCMe), 1Cu(DMAP), 1Cu(PPh3), 1Cu(2,6-xylyl isonitrile), 2Cu(PPh3), and 2Cu(2,6-xylyl isonitrile) were prepared and, for the most part, characterized by x-ray diffraction studies. Compared to their more common analogs with aromatic substituents on N, 1 and 2 seem to be more basic (1 > 2) and sterically more demanding (2 > 1). Their Cu complexes are less stable than those of aryl-substituted diketiminates and tend to decompose by disproportionation, most probably after dissociation of the coordinated Lewis base. Despite the rotational freedom around the N-R* bond, the complexes are sterically rigid, a necessary requirement for potential applications in enantioselective catalysis.

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

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.Bredikhina, Zemfira A.; Kurenkov, Alexey V.; Krivolapov, Dmitry B.; Bredikhin, Alexander A. researched the compound: (2S)-(+)-3-Chloropropane-1,2-diol( cas:60827-45-4 ).Recommanded Product: 60827-45-4.They published the article 《Stereoselective crystallization of 3-(2,6-dimethylphenoxy)propane-1,2-diol: preparation of the single-enantiomer drug mexiletine》 about this compound( cas:60827-45-4 ) in Tetrahedron: Asymmetry. Keywords: crystallization dimethylphenoxypropanediol enantiomer drug mexiletine. We’ll tell you more about this compound (cas:60827-45-4).

Racemic 3-(2,6-dimethylphenoxy)propane-1,2-diol 8 undergoes spontaneous resolution upon crystallization This fact is confirmed by the m.p. inspection, vibration spectra and X-ray single crystal diffraction of racemic and scalemic crystalline samples of 8. Racemic 8 has been effectively resolved by a preferential crystallization procedure into (S)- and (R)-enantiomers with ee of approx. 90%. The enantiomeric purity of (S)- and (R)-8 could be increased to ee >99% through simple recrystallization Nonracemic diols 8 were converted into nonracemic 1,2-epoxy-3-(2,6-dimethylphenoxy)propanes (S)- and (R)-7 with ee 98% via Mitsunobu reaction. The reaction proceeded without loss of enantiomeric purity, and the initial configuration of the stereogenic center was conserved. Enantiopure epoxides 7 were converted into nonracemic 1-(2,6-dimethylphenoxy)propan-2-ols 2, which are valuable intermediates in single-enantiomer mexiletine synthesis.

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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: (2S)-(+)-3-Chloropropane-1,2-diol( cas:60827-45-4 ) is researched.Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol.Suzuki, Toshio; Kasai, Naoya; Minamiura, Noshi published the article 《Microbial production of optically active 1,2-diols using resting cells of Alcaligenes sp. DS-S-7G》 about this compound( cas:60827-45-4 ) in Journal of Fermentation and Bioengineering. Keywords: diol production Alcaligenes enantioselective oxidation. Let’s learn more about this compound (cas:60827-45-4).

A novel generation method of optically active 1,2-diols with excellent optical purity (>98% enantiomeric excess) from their racemates was developed using the resting cells of Alcaligenes sp. DS-S-7G. This method was based on microbial enantioselective oxidation of the racemic 1,2-diols. When 1% 1,2-butanediol was used as a substrate, the degradation reaction in the presence of NAD+ could be carried out 8 times in 200 h.

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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: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Carbonylation of a Tetrameric Aryloxocopper(I) Cluster.Formula: C9H11Cu.

Carbonylation of 2,6-diphenylphenoxocopper(I), tetrameric [(CuOC6H3Ph2)4] (1), results in a [{Cu(OC6H3Ph2)(CO)}2] dimer (2). The parent aryl oxide, [(CuOC6H3Ph2)4], which was prepared from mesitylcopper(I) and 2,6-diphenylphenol, has an approx. planar Cu4O4 core, in which Cu(I) is two-coordinated and Cu-O bonds range from 1.834(7) to 1.865(7) Å. Its carbonylation product 2 is a μ2-phenoxo-bridged dimer, containing three-coordinated Cu(I), with longer Cu-O bonds, viz. 1.953(7)-1.995(7) Å. Cu-C bond lengths in 2 are 1.78(1) and 1.79(1) Å, resp., with both carbonyl C-O distances equal to 1.12(1) Å, and Cu-C-O angles of 174(1) and 179(1)°, resp. Carbonyl stretching frequencies in the IR are 2099, 2103, and 2112 cm-1 for the solid and 2102 cm-1 in toluene solution, and the 13C NMR signal (toluene solution) is at 168 ppm. From comparison with other carbonyl complexes of Cu(I), the Cu-C bond is judged to be predominantly of σ character, with minimal metal → ligand π* contribution. Both 1 and 2 retain their aggregation states on dissolution in nonpolar solvents, as ascertained by cryoscopic mol. weight determinations of the compounds in benzene. Crystal data: 1, triclinic, space group P1̅, a 12.738(9), b 22.426(5), and c 9.984(3) Å, α 101.62(2), β 91.02(4), and γ 85.93(3)°, Z = 2, R = 0.052 (Rw = 0.058); 2, triclinic, space group P1̅, a 10.67(3), b 15.72(1), and c 10.05(1) Å, α 96.99(8), β 104.66(16), and γ 101.46(12)°, Z = 2, R = 0.049 (Rw = 0.054).

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

Name: 2-Methylglutaronitrile. 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: 2-Methylglutaronitrile, is researched, Molecular C6H8N2, CAS is 4553-62-2, about Optimization of an immobilized-cell biocatalyst for production of 4-cyanopentanoic acid. Author is Hann, Eugenia C.; Sigmund, Amy E.; Hennessey, Susan M.; Gavagan, John E.; Short, David R.; Ben-Bassat, Arie; Chauhan, Sarita; Fallon, Robert D.; Payne, Mark S.; DiCosimo, Robert.

Optimization of microbial cell immobilization, catalyst specific activity, and volumetric productivity were required for scale-up of the nitrilase-catalyzed hydrolysis of 2-methylglutaronitrile to 4-cyanopentanoic acid, an intermediate in the preparation of 1,5-dimethyl-2-piperidone. As an alternative to the immobilization of Acidovorax facilis 72W cells in carrageenan, immobilization in alginate, followed by crosslinking with glutaraldehyde and polyethylenimine, produced a catalyst which was stable in reaction mixtures containing high concentrations of 4-cyanopentanoic acid ammonium salt. Immobilization in alginate produced catalysts with a higher nitrilase specific activity than was achieved in carrageenan, and volumetric productivity of 4-cyanopentanoic acid was increased from 19 to 49 g/L-h. Substituting alginate for carrageenan also eliminated 1 process step in the immobilization. A further increase in volumetric productivity to 79 g/L-h was achieved by using an immobilized Escherichia coli transformant which expresses A. facilis 72W nitrilase.

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

Name: Mesitylcopper(I). The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about Copper-Mediated Oxygenation of Nitronate to Nitrite and Acetone in a Copper(I) Nitronate Complex. Author is Balogh-Hergovich, Eva; Speier, Gabor; Huttner, Gottfried; Zsolnai, Laszlo.

Copper(I) aci-2-nitropropanato complex Cu(Me2CNO2)(PPh3)2 was prepared and characterized by spectral methods as well as by x-ray crystallog. Oxidation of the nitronate complex with dioxygen in MeCN produced acetone in 62% yield, and nitrite complex Cu(NO2)(PPh3)2 was isolated in 82% yield. A labeling experiment with 18O2 showed that 18O was only incorporated in the acetone. Kinetics of the oxidation of the nitronate complex in pyridine (18.5°, 1 bar O2) were first order with respect to the complex and dioxygen, with a second-order rate constant of k2 = 2.48 × 10-2 M-1 s-1. Labeling with 18O2 and the stoichiometry of the oxygenation reaction gives unequivocal evidence for the incorporation of both O atoms of O2 into two substrate mols. reminiscent of intermol. dioxygenase. An intermol. peroxidic species is discussed in the proposed mechanism. Copper-assisted intermol. oxygenation of the C:N double bond of the aci-2-nitropropanato ligand with triplet dioxygen may indicate that the presence of Cu(I) is essential in the activation of triplet dioxygen, and the reduced oxygen species is ready for oxidative splitting of the C:N double bond.

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

Recommanded Product: Mesitylcopper(I). Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about A simplified catalytic system for direct catalytic asymmetric aldol reaction of thioamides; application to an enantioselective synthesis of atorvastatin. Author is Kawato, Yuji; Iwata, Mitsutaka; Yazaki, Ryo; Kumagai, Naoya; Shibasaki, Masakatsu.

A new catalytic system was developed for the direct catalytic asym. aldol reaction of thioamides. The new lithium-free Cu catalyst (second-generation catalyst) exhibited enhanced catalytic efficiency over the previously developed catalyst comprising [Cu(CH3CN)4]PF6/Ph-BPE/LiOAr (first-generation catalyst), which required a tedious catalyst preparation process. In the reaction with the second-generation catalyst, the intermediate Cu-aldolate functioned as a Bronsted base to generate thioamide enolate, efficiently driving the catalytic cycle. The present aldol methodol. culminated in a concise asym. synthesis of atorvastatin I (Lipitor: atorvastatin calcium), a widely prescribed HMG-CoA reductase inhibitor for lowering low-d. lipoprotein cholesterol.

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