Month: April 2022

Li, Luqing; Li, Menghui; Liu, Ying; Cui, Qingqing; Bi, Keyi; Jin, Shanshan; Wang, Yujie; Ning, Jingming; Zhang, Zhengzhu published the article 《High-sensitivity hyperspectral coupled self-assembled nanoporphyrin sensor for monitoring black tea fermentation》. Keywords: nanoporphyrin sensor black tea fermentation self assembly hyperspectral imaging.They 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). 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:28903-71-1) here.

The rapid and scientific method for monitoring the quality of black tea fermentation is of great significance to the quality control of black tea production This study proposed a novel method for evaluating the fermentation quality of black tea by using hyperspectral imaging technol. with self-assembled nanoporphyrin (N-TPP) dyes, which were used as aroma capture probes in the black tea fermentation process. SEM and UV-visible spectroscopy were performed to characterize the N-TPP. Then, the results of the colorimetric sensor array (conventional camera color method) and the proposed hyperspectral methods were compared. Finally, the hyperspectral information of N-TPP with higher sensitivity was collected, and the qual. models of evaluating black tea fermentation quality were established using support vector machine (SVM), extreme learning machine, and linear discriminant anal. Among these models, the SVM model exhibited the highest discriminant accuracy. The accuracy of the SVM model based on the hyperspectral information of the self-assembled N-TPP array was 98.85 %, which was considerably higher than that (68.97 %) of the SVM model based on the color information of the porphyrin array. The results revealed that the proposed method can effectively improve the monitoring accuracy of black tea fermentation quality.

After consulting a lot of data, we found that this compound(28903-71-1)Safety of 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II) can be used in many types of reactions. And in most cases, this compound has more advantages.

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

Reference of 2-Methylglutaronitrile. 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: 2-Methylglutaronitrile, is researched, Molecular C6H8N2, CAS is 4553-62-2, about Optimization of an immobilized-cell biocatalyst for production of 4-cyanopentanoic acid.

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.

After consulting a lot of data, we found that this compound(4553-62-2)Reference of 2-Methylglutaronitrile can be used in many types of reactions. And in most cases, this compound has more advantages.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 60827-45-4, is researched, SMILESS is OC[C@H](O)CCl, Molecular C3H7ClO2Journal, Tetrahedron: Asymmetry called Solid state properties and effective resolution procedure for guaifenesin, 3-(2-methoxyphenoxy)-1,2-propanediol, Author is Bredikhina, Zemfira A.; Novikova, Victorina G.; Zakharychev, Dmitry V.; Bredikhin, Alexander A., the main research direction is guaifenesin enantiomer resolution.Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol.

Racemic expectorant guaifenesin, 3-(2-methoxyphenoxy)-1,2-propanediol (2) undergoes spontaneous resolution upon crystallization This fact is confirmed by thermal anal. (single eutectic V-shape binary melting phase diagram, adequate entropy and free energy characteristics). Racemic 2 could be effectively resolved into (S)- and (R)-2 by a preferential crystallization procedure. Single enantiomer drugs levomoprolol and levotensin were obtained by starting from enantiomeric 2 through the sulfite route.

After consulting a lot of data, we found that this compound(60827-45-4)Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol can be used in many types of reactions. And in most cases, this compound has more advantages.

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 Structural Snapshots of a Flexible Cu2P2 Core that Accommodates the Oxidation States CuICuI, Cu1.5Cu1.5, and CuIICuII, the main research direction is copper phosphido dinuclear preparation structure electrochem oxidation luminescence; crystal structure copper dinuclear phosphinophenylphosphido complex.COA of Formula: C9H11Cu.

The phosphido-bridged dicopper(I) complex {(PPP)Cu}2 was synthesized and structurally characterized ([PPP]- = bis(2-diisopropylphosphinophenyl)phosphide). Cyclic voltammetry of {(PPP)Cu}2 in THF shows fully reversible oxidations at -1.02 V (Cu1.5Cu1.5/CuICuI) and -0.423 V (CuIICuII/Cu1.5Cu1.5). Chem. oxidation of {(PPP)Cu}2 by one electron yields the class III mixed-valence species [{(PPP)Cu}2]+ (EPR, UV-visible). Structural data establish an unexpectedly large change (0.538 Å) in the Cu···Cu distance upon oxidation state. Oxidation of {(PPP)Cu}2 by two electrons yields the dication [{(PPP)Cu}2]2+, an antiferromagnetically coupled dicopper(II) complex. Maintenance of a pseudotetrahedral geometry that is midway between a square plane and an ideal tetrahedron at the copper centers, along with a high degree of flexibility at the phosphide hinges, allows for efficient access to CuICuI, Cu1.5Cu1.5, and CuIICuII redox states without the need for ligand exchange, substitution, or redistribution processes.

After consulting a lot of data, we found that this compound(75732-01-3)COA of Formula: C9H11Cu can be used in many types of reactions. And in most cases, this compound has more advantages.

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, Research Support, Non-U.S. Gov’t, Journal of the American Chemical Society called Benzoisothiazolone Organo/Copper-Cocatalyzed Redox Dehydrative Construction of Amides and Peptides from Carboxylic Acids using (EtO)3P as the Reductant and O2 in Air as the Terminal Oxidant, Author is Liebeskind, Lanny S.; Gangireddy, Pavankumar; Lindale, Matthew G., which mentions a compound: 180258-46-2, SMILESS is O=C(C1=NC(N)=CN1C)OCC.[H]Cl, Molecular C7H12ClN3O2, Electric Literature of C7H12ClN3O2.

Carboxylic acids and amine/amino acid reactants can be converted to amides and peptides at neutral pH within 5-36 h at 50° using catalytic quantities of a redox-active benzoisothiazolone and a copper complex. These catalytic “”oxidation-reduction condensation”” reactions are carried out open to dry air using O2 as the terminal oxidant and a slight excess of tri-Et phosphite as the reductant. Tri-Et phosphate is the easily removed byproduct. These simple-to-run catalytic reactions provide practical and economical procedures for the acylative construction of C-N bonds.

Although many compounds look similar to this compound(180258-46-2)Electric Literature of C7H12ClN3O2, numerous studies have shown that this compound(SMILES:O=C(C1=NC(N)=CN1C)OCC.[H]Cl), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
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 Chemoenzymatic production of 1,5-dimethyl-2-piperidone, published in 2001-01-22, which mentions a compound: 4553-62-2, Name is 2-Methylglutaronitrile, Molecular C6H8N2, Computed Properties of C6H8N2.

A chemoenzymic process for the preparation of 1,5-dimethyl-2-piperidone (1,5-DMPD) from 2-methylglutaronitrile (MGN) has been demonstrated. MGN was first hydrolyzed to 4-cyanopentanoic acid (4-CPA) ammonium salt using the nitrilase activity of immobilized Acidovorax facilis 72W cells. The hydrolysis reaction produced 4-CPA ammonium salt with greater than 98% regioselectivity at 100% conversion, and at concentrations of 170-210 g 4-CPA/l. Catalyst productivities of at least 1000 g 4-CPA/g dry cell weight (dcw) of immobilized cells were achieved by recycling the immobilized-cell catalyst in consecutive stirred-batch reactions. After recovery of the immobilized cell catalyst for reuse, the 4-CPA ammonium salt in the aqueous product mixture was directly converted to 1,5-DMPD by low-pressure catalytic hydrogenation in the presence of added methylamine.

Although many compounds look similar to this compound(4553-62-2)Computed Properties of C6H8N2, numerous studies have shown that this compound(SMILES:N#CC(C)CCC#N), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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

SDS of cas: 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 Switching Co/N/C Catalysts for Heterogeneous Catalysis and Electrocatalysis by Controllable Pyrolysis of Cobalt Porphyrin. Author is Wu, Zhen-Yu; Chen, Ming-Xi; Chu, Sheng-Qi; Lin, Yue; Liang, Hai-Wei; Zhang, Jing; Yu, Shu-Hong.

Identifying the optimal synthetic and structural parameters in preparing pyrolyzed metal/nitrogen/carbon (M/N/C) materials is crucial for developing effective catalysts for many important catalytic processes. Here we report a group of mesoporous Co/N/C catalysts ranging from polymerized cobalt porphyrin to Co/N-doped carbons, which are prepared by pyrolysis of cobalt porphyrin using silica nanoparticles as templates at different temperatures, for boosting both heterogeneous catalysis and electrocatalysis. It is revealed that the polymerized cobalt porphyrin prepared at low temperature (500°C) is a polymer-like network with exclusive single-atom Co-Nx sites, and that the high-temperature-pyrolysis (>600°C) produces an elec. conductive Co/N-doped carbon, accompanied by part degradation of Co-Nx centers. We identify that the polymerized cobalt porphyrin with undecomposed Co-Nx centers is optimal for heterogeneous catalytic oxidation of ethylbenzene, whereas the elec. conductive Co/N-doped carbon is ideal for eletrocatalytic oxygen reduction Our results provide new insights for rationally optimizing M/N/C catalysts for different reactions.

Although many compounds look similar to this compound(28903-71-1)SDS of cas: 28903-71-1, numerous studies have shown that this compound(SMILES:COC1=CC=C(C=C1)C(C2=[N]3[Co+2]4([N-]56)[N-]7C(C(C8=CC=C(C=C8)OC)=C3C=C2)=CC=C7C(C9=CC=C(C=C9)OC)=C%10C=CC%11=[N]4%10)=C5C=CC6=C%11C%12=CC=C(C=C%12)OC), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
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 Theory of chain-end activated degradation of heterodisperse polymers, published in 1957, which mentions a compound: 4553-62-2, mainly applied to , Electric Literature of C6H8N2.

The theory treated steady-state degradation. Previous data on the initial degradation rates of poly-(methyl methacrylate) as a function of DPn (mean chain length) were fitted to asymptotic solutions for high and low DPn, but diverged largely from the solution for intermediate regions. Because of the simplicity of the solution for exponentially distributed polymer, a small random scission component, superposed on chain-end activated zipping, was treated with ample accuracy to fit published data for DPn decay during degradation of polystyrene. The data were not sufficiently accurate to distinguish between random splitting, weak-link scission, or scission following chain transfer to polymer. The rate curves on low-mol.-weight polystyrene at high temperature by Madorsky (C.A. 46, 10813h) were fitted to the improved theory, assuming termination by disproportionation. The data of Grassie and Kerr (C.A. 46, 7857f; 51, 12611d) for high-mol.-weight polystyrene at low temperature was fitted, assuming 1st-order radical termination.

Although many compounds look similar to this compound(4553-62-2)Electric Literature of C6H8N2, numerous studies have shown that this compound(SMILES:N#CC(C)CCC#N), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
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 Spontaneous Resolution of Chiral 3-(2,3-Dimethylphenoxy)propane-1,2-diol under the Circumstances of an Unusual Diversity of Racemic Crystalline Modifications, published in 2017-08-02, which mentions a compound: 60827-45-4, Name is (2S)-(+)-3-Chloropropane-1,2-diol, Molecular C3H7ClO2, Name: (2S)-(+)-3-Chloropropane-1,2-diol.

Depending on the conditions of crystallization from solutions, racemic 3-(2,3-dimethylphenoxy)propane-1,2-diol 1 forms 3 relatively stable crystalline modifications. Each of the crystalline forms, namely, 2 polymorphic racemic compounds and a racemic conglomerate, was characterized by single-crystal x-ray diffraction. Two more metastable racemic compounds crystallized from the racemic melt were found by DSC method. Addnl. thermochem. studies allowed to plot the dependence of the free Gibbs energy on temperature for all the phases found. With the help of slurrying experiments, the nature of the transitions between solid phases was specified. Even a slight predominance of 1 of the enantiomers in almost racemic 1 samples ensures the crystallization of the conglomerate. The revealed features of rac-1 crystallization were taken into account during the realization of its resolution into individual enantiomers by the entrainment procedure.

Although many compounds look similar to this compound(60827-45-4)Name: (2S)-(+)-3-Chloropropane-1,2-diol, numerous studies have shown that this compound(SMILES:OC[C@H](O)CCl), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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

Computed Properties 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 Insertion of formaldehyde into a copper-carbon bond. Author is Leoni, Piero; Pasquali, Marco.

Upon mixing equimolar amounts of mesitylcopper(I), CuAr, (Ar = 2,4,6-trimethylphenyl) and polymeric formaldehyde in THF in the presence of PPh3 the formaldehyde quickly dissolves. Gas-chromatog. anal. of the products after hydrolytic workup reveals the presence of mesityl alc., ArCH2OH (60% yield), the expected product of direct insertion of formaldehyde into a mesityl-copper bond. When the reaction is carried on for several days, 2,4,6-trimethylbenzyl formate and Me formate are the main products.

Although many compounds look similar to this compound(75732-01-3)Computed Properties of C9H11Cu, numerous studies have shown that this compound(SMILES:[Cu]C1=C(C)C=C(C)C=C1C), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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