Month: April 2022

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.Jones, A. R.; Porter, L. M. researched the compound: (2S)-(+)-3-Chloropropane-1,2-diol( cas:60827-45-4 ).Quality Control of (2S)-(+)-3-Chloropropane-1,2-diol.They published the article 《Inhibition of glycolysis in boar spermatozoa by α-chlorohydrin phosphate appears to be mediated by phosphatase activity》 about this compound( cas:60827-45-4 ) in Reproduction, Fertility and Development. Keywords: pig sperm glycolysis chlorohydrin phosphate phosphatase. We’ll tell you more about this compound (cas:60827-45-4).

(R,S)-α-chlorohydrin-1-phosphate, previously shown to have no anti-glycolytic activity on mature boar sperm in vitro, is a substrate for acid and/or neutral phosphatase(s) that are associated with washed sperm. The high phosphatase activity hydrolyses the ester to α-chlorohydrin which undergoes oxidation to (S)-3-chlorolactaldehyde, a specific inhibitor of sperm glyceraldehyde-3-phosphate dehydrogenase and triosephosphate isomerase, thereby exhibiting an anti-glycolytic action.

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

Lopes, Cesar; Hakansson, Mikael; Jagner, Susan published the article 《Products of the reaction between copper(I) phenoxide and triphenylphosphine》. Keywords: crystal structure copper phenoxide phosphine complex; structure copper phenoxide phosphine dinuclear tetranuclear; copper phenolate phosphine complex preparation structure; phenoxide copper phosphine complex preparation structure.They researched the compound: Mesitylcopper(I)( cas:75732-01-3 ).Reference 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.

Two phenolatocopper(I) derivatives, [Cu4(PPh3)4(OPh)4] (1) and [Cu2(PPh3)3(OPh)2] (2), were prepared by the addition of triphenylphosphine to copper(I) phenoxide, obtained from mesitylcopper(I) and phenol. Characterization by crystal structure determination showed 1 to be a tetramer with a cubane-type Cu4O4 core in which Cu-O distances range from 2.05(2)-2.26(2) Å. 2 Is a μ2-phenoxide dimer in which one copper(I) center is four-coordinated by two phenoxide and two triphenylphosphine ligands, while the other is coordinated by a single triphenylphosphine ligand and thus three-coordinated. Complex 1 crystallizes as the solvate [Cu4(PPh3)4(OPh)4]·(PhMe)2 in the monoclinic space group P21/c with a 14.822(7), b 23.160(4), c 28.193(6) Å, β 98.64(2)° at -90° and Z = 4; full-matrix least-squares refinement yielded R = 0.082 for 529 parameters and 3931 observed reflections. [Cu2(PPh3)3(OPh)2] (2) crystallizes in the triclinic space group P1̅ with a 13.948(4), b 16.846(2), c 12.480(3) Å, α 94.92(2), β 110.45(2), γ 95.96(2)° at -120° and Z = 2; full-matrix least-squares refinement yielded R = 0.063 for 328 parameters and 2507 observed reflections. The effect of increasing the PPh3:CuOPh ratio on the stability of the phenoxide is discussed in terms of the coordination geometry and consequent accessibility of the metal to small mols.

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

COA of Formula: C10H8ClN4NaO2S. 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: Sodium ((4-aminophenyl)sulfonyl)(6-chloropyrazin-2-yl)amide, is researched, Molecular C10H8ClN4NaO2S, CAS is 23307-72-4, about Voltammetric determination of sulfaclozine sodium at sephadex-modified carbon paste electrode. Author is Hussien, Emad Mohamed; Saleh, Hanaa; El Henawee, Magda; Abou El Khair, Afaf; Ahmed, Neven.

The electrochem. behavior of Sulfaclozine Sodium (SLC) was studied at a bare and sephadex-modified carbon paste electrodes by cyclic voltammetry and square wave voltammetry. The cyclic voltammetry (CV) showed a well-defined irreversible oxidation peak at 0.94 V in Britton-Robinson buffer pH 7.0. The strong affinity of SLC to sephadex allowed accumulation of SLC at the surface of electrode and thus higher electrochem. sensitivity to SLC. The influence of sephadex loading, the pH of the solution and the scan rate on the peak current was studied. A linear calibration curve covering the concentration range from 0.005 to 1 mM was obtained using SWV. The method was successfully applied for the determination of SLC in the veterinary pharmaceutical formulations with satisfactory accuracy and precision.

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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Dalton Transactions called Why are the {Cu4N4} rings in copper(I) phosphinimide clusters [Cu{μ-N:PR3}]4 (R = NMe3 or Ph) planar?, Author is Robinson, Thomas P.; Price, Richard D.; Davidson, Matthew G.; Fox, Mark A.; Johnson, Andrew L., which mentions a compound: 75732-01-3, SMILESS is [Cu]C1=C(C)C=C(C)C=C1C, Molecular C9H11Cu, Safety of Mesitylcopper(I).

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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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 Optical isomers of chloropropanols: Mechanisms of their formation and decomposition in foods, published in 2002, which mentions a compound: 60827-45-4, Name is (2S)-(+)-3-Chloropropane-1,2-diol, Molecular C3H7ClO2, Recommanded Product: 60827-45-4.

Protein hydrolyzates produced by hydrochloric acid hydrolysis were analyzed for 3-chloropropane-1,2-diol and its enantiomers. It was found that (R)-3-chloropropane-1,2-diol and (S)-3-chloropropane-1,2-diol were present in the hydrolyzates in equimolar concentrations Model system experiments with glycerol, triolein and soy lecithin heated with hydrochloric acid in solution showed that these materials were precursors of 3-chloropropane-1,2-diol and yielded racemic mixtures of its enantiomers. Yields of 3-chloropropane-1,2-diols decreased in the order triolein > lecithin > glycerol. Mechanisms of 3-chloropropane-1,2-diol enantiomer formation during the production of protein hydrolyzates are presented and discussed as well as reaction pathways of their decomposition in alk. media via the corresponding (R)- and (S)-hydroxymethyloxiranes. In alk. media both 3-chloropropane-1,2-diol enantiomers decomposed at the same rate.

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

Electric Literature of C9H11Cu. 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 In situ Catalytic Generation of Allylcopper Species for Asymmetric Allylation: Toward 1H-Isochromene Skeletons. Author is Kawai, Junya; Chikkade, Prasanna Kumara; Shimizu, Yohei; Kanai, Motomu.

Allylcopper species can be generated in situ via catalytic intramol. oxycupration of allenic alc. The allylcopper can react with various aldehydes and a ketone to give 1H-isochromene derivatives enantioselectively. The protocol is atom-economical, highly regioselective, stereoconvergent, and tolerant to free OH groups. Thus, e.g., enantio- and regioselective oxycupration/asym. addition cascade reaction of allenic alc. I with benzaldehyde in presence of mesitylcopper and chiral diphosphine ligand in HMPA/THF afforded isochromene II (98% yield, 92% ee).

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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.Synthetic Route of C9H11Cu.Zou, Wenxing; Zhu, Qihao; Fettinger, James C.; Power, Philip P. published the article 《Dimeric Copper and Lithium Thiolates: Comparison of Copper Thiolates with Their Lithium Congeners》 about this compound( cas:75732-01-3 ) in Inorganic Chemistry. Keywords: copper lithium thiolate dimeric complex preparation; crystal structure copper lithium thiolate dimeric complex. Let’s learn more about this compound (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

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.Stauffer, Molly; Sakhaei, Zeinab; Greene, Christine; Ghosh, Pokhraj; Bertke, Jeffery A.; Warren, Timothy H. researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Safety of 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II).They published the article 《Mechanism of O-Atom Transfer from Nitrite: Nitric Oxide Release at Copper(II)》 about this compound( cas:28903-71-1 ) in Inorganic Chemistry. Keywords: oxygen atom transfer kinetics copper coordinated nitrite phosphine; copper ketiminato nitrito preparation crystal structure nitric oxide release. We’ll tell you more about this compound (cas:28903-71-1).

Nitric oxide (NO) is a key signaling mol. in health and disease. While nitrite acts as a reservoir of NO activity, mechanisms for NO release require further understanding. Electronically varied β-diketiminato-copper(II) nitrite complexes [CuII](κ2-O2N) react with a range of electronically tuned triarylphosphines PArZ3 that release NO with the formation of O=PArZ3. Second-order rate constants are largest for electron-poor Cu(II) nitrite and electron-rich phosphine pairs. Computational anal. reveals a transition-state structure energetically matched with exptl. determined activation barriers. The production of NO follows a pathway that involves nitrite isomerization at CuII from κ2-O2N to κ1-NO2 followed by O-atom transfer (OAT) to form O=PArZ3 and [CuI]-NO that releases NO upon PArZ3 binding at CuI to form [CuI]-PArZ3. These findings illustrate important mechanistic considerations involved in NO formation from nitrite via OAT.

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

Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Biosynthesis of (R)-epichlorohydrin at high substrate concentration by kinetic resolution of racemic epichlorohydrin with a recombinant epoxide hydrolase. Author is Jin, Huo-Xi; Liu, Zhi-Qiang; Hu, Zhong-Ce; Zheng, Yu-Guo.

The substrate concentration and yield were shown to be very low in the production of (R)-epichlorohydrin by hydrolysis of racemic epichlorohydrin using epoxide hydrolases in previous studies. In this work, we synthesized an epoxide hydrolase gene from Agrobacterium radiobacter and expressed it in Escherichia coli by the PCR assembly method. The recombinant A. radiobacter epoxide hydrolase (ArEH) was applied in the preparation of (R)-epichlorohydrin and, a yield of 42.7% with ≥99% enantiomeric excess (ee) from 25.6 mM racemic epichlorohydrin was obtained. However, the ee of (R)-epichlorohydrin was not able to reach 99% due to substrate and product inhibition when the substrate concentration was over 320 mM. Inhibition studies revealed that (S)-3-chloro-1,2-propanediol displayed non-competitive inhibition in the conversion of (S)-epichlorohydrin but non-significant inhibition for (R)-epichlorohydrin. Moreover, ArEH was successfully applied in the preparation of (R)-epichlorohydrin at high substrate concentration by eliminating the substrate inhibition. The substrate concentration increased to 448 mM by intermittent feeding of the substrate and to 512 mM by using a two-phase reaction system, with a high yield (>27%) and ee (>98%) of (R)-epichlorohydrin. This is the first report of high-yield production of (R)-epichlorohydrin at high substrate concentration, laying the foundations for its application on the industrial scale.

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

Application of 28903-71-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Reshaping cathodic catalyst layer for anion exchange membrane fuel cell from heterogeneous catalysis to homogeneous catalysis. Author is Ren, Rong; Wang, Xiaojiang; Chen, Hengquan; Miller, Hamish Andrew; Salam, Ihtasham; Varcoe, John Robert; Wu, Liang; Chen, Youhu; Liao, Hong-Gang; Liu, Ershuai; Bartoli, Francesco; Vizza, Francesco; Jia, Qingying; He, Qinggang.

In anion exchange membrane fuel cells, catalytic reactions occur at a well-defined three-phase interface, wherein conventional heterogeneous catalyst layer structures exacerbate problems, such as low catalyst utilization and limited mass transfer. We developed a structural engineering strategy to immobilize a mol. catalyst tetrakis(4-methoxyphenyl)porphyrin cobalt(II) (TMPPCo) on the side chains of an ionomer (polyfluorene, PF) to obtain a composite material (PF-TMPPCo), thereby achieving a homogeneous catalysis environment inside ion-flow channels, with greatly improved mass transfer and turnover frequency as a result of 100% utilization of the catalyst mols. The unique structure of the homogeneous catalysis system comprising interconnected nanoreactors exhibits advantages of low overpotential and high fuel-cell power d. This strategy of reshaping of the catalyst layer structure may serve as a new platform for applications of many mol. catalysts in fuel cells.

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