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.Liu, Tao; Ruan, Wenjuan; Zhang, Yuling; Zhu, Zhi’ang; Chen, Rongti researched the compound: (2S)-(+)-3-Chloropropane-1,2-diol( cas:60827-45-4 ).Product Details of 60827-45-4.They published the article 《Reaction kinetics of hydrolytic resolution of epichlorohydrin catalyzed by chiral salen metal complex》 about this compound( cas:60827-45-4 ) in Cuihua Xuebao. Keywords: hydrolytic resolution epichlorohydrin chiral salen metal complex kinetics. We’ll tell you more about this compound (cas:60827-45-4).

The reaction kinetics of hydrolytic resolution of racemic epichlorohydrin to chiral 3-chloro-1,2-propanediol and optically active epichlorohydrin, catalyzed by chiral salen metal complexes, was studied by using gas chromatog. The effects of temperature, catalyst type and catalyst concentration on the reaction rate were explored.

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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.Quality Control of (2S)-(+)-3-Chloropropane-1,2-diol.Iriuchijima, Shinobu; Kojima, Natsuko published the article 《Asymmetric hydrolysis of esters by biochemical methods. Part III. Asymmetric hydrolysis of (±)-1,2-diacetoxy-3-chloropropane and its related compounds with lipase. Synthesis of optically pure (S)-propranolol》 about this compound( cas:60827-45-4 ) in Agricultural and Biological Chemistry. Keywords: diacetoxychloropropane asym hydrolysis lipase. Let’s learn more about this compound (cas:60827-45-4).

Asym. hydrolysis of (±)-1,2-diacetoxy-3-chloropropane (I) using lipoprotein lipase gave (S)-I of 90% enantiomeric excess (e.e.). Reactions of (S)-I with phenols in an alk. condition yielded the corresponding (S)-3-aryloxy-1,2-propranediols. (S)-Propranolol was prepared from (S)-3-(1-naphthoxy)-1,2-propanediol. Hydrolysis of (±)-1,2-diacetoxy-3-bromopropane (II) and (±)-1,2-diacetoxyethylbenzene (III) with the lipase afforded (S)-II of 77% e.e. and (R)-III of 73% e.e., resp.

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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 23307-72-4, is researched, Molecular C10H8ClN4NaO2S, about High-throughput screening of pesticide and veterinary drug residues in baby food by liquid chromatography coupled to quadrupole Orbitrap mass spectrometry, the main research direction is pesticide veterinary drug baby food quadrupole Orbitrap mass spectrometry; Baby food; Multi-residue methods; Q-Orbitrap; Targeted-screening; Validation.Quality Control of Sodium ((4-aminophenyl)sulfonyl)(6-chloropyrazin-2-yl)amide.

A new anal. method was developed and validated for simultaneous anal. of 333 pesticide and veterinary drug residues in baby food. Response surface methodol. was employed to optimize a generic extraction method. Ultrahigh-performance liquid chromatog. and electrospray ionization quadrupole Orbitrap high-resolution mass spectrometry (UHPLC-ESI Q-Orbitrap) was used for the separation and detection of all the analytes. The method was validated by taking into consideration the guidelines specified in Commission Decision 2002/657/EC and SANCO/12571/2013. The extraction recoveries were in a range of 79.8-110.7%, with coefficient of variation <8.3%. The 333 compounds behave dynamic in the range 0.1-1000 μg kg-1 concentration, with correlation coefficient >0.99. The limits of detection for the analytes are in the range 0.01-5.35 μg kg-1. The limits of quantification for the analytes are in the range 0.01-9.27 μg kg-1. This method has been successfully applied on screening of pesticide and veterinary drugs in ninety-three com. baby food samples, and tilmicosin, fenbendazole, tylosin tartrate and thiabendazole were detected in some samples tested in this study. The present study is very useful for fast screening of different food contaminants.

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

Rupini, Boyina; Pasricha, Sharda; Rathi, Brijesh published the article 《Asymmetric reductive amination of carbonyl compounds by using N,N,N-tributylpropanaminium based novel chiral ionic liquid》. Keywords: carbonyl compound asym reductive amination tributylpropanaminium chiral ionic liquid.They researched the compound: (2S)-(+)-3-Chloropropane-1,2-diol( cas:60827-45-4 ).Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol. 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:60827-45-4) here.

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 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 Synthesis of Copper(I) Complexes with Ketimide and Hydrazide Ligands, the main research direction is copper ketimide hydrazide tetranuclear complex preparation crystal structure.Synthetic Route of C9H11Cu.

Copper(I) chloride reacted with lithium ketimides to form tetrameric homoleptic copper(I) ketimide complexes, [Cu(N:CR2)]4, where R = t-Bu or Ph. Mesityl copper reacted with excess 1-trimethylsilylmethyl-2,2,-dimethylhydrazine to give the mixed ligand complex (2,4,6-C6Me3H2)Cu4[N(SiMe3)NMe2]3. Single-crystal x-ray crystallog. studies revealed that the three complexes have eight-member ring structures in which the ring has a hinged or butterfly shape. Although an eight-member ring structure is common for copper(I) amido, alkyl, and aryl clusters, the structure of [Cu(N:C-t-Bu2)]4 is unusual because the hinge angle is significantly smaller than is common, resulting in short Cu···Cu contacts compared to related complexes.

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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 60827-45-4, is researched, Molecular C3H7ClO2, about Optical isomers of chloropropanediols: mechanisms of their formation and decomposition in protein hydrolyzates, the main research direction is chloropropanediol enantiomer formation.Computed Properties of C3H7ClO2.

Protein hydrolyzates produced by HCl 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 experiments with glycerol, triolein and soy lecithin heated with HCl in solution showed that these materials were precursors of 3-chloropropane-1,2-diol and 2-chloropropane-1,3-diol and, as expected, yielded racemic 3-chloropropane-1,2-diol. Yields of 3-chloropropane-1,2-diols decreased in the order triolein > lecithin > glycerol. The mechanisms of 3-chloropropane-1,2-diol enantiomers formation during the production of protein hydrolyzates are presented and discussed as well as the reaction pathways of their decomposition in alk. media via the corresponding intermediates, (R)- and (S)-glycidol, resp. Both epoxides are hydrolyzed to glycerol and form a variety of products with hydrolyzate constituents.

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

Formula: C48H38CoN4O4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Selective Aerobic Oxidation of 4-Ethylnitrobenzene to 4-Nitroacetophenone Promoted by Metalloporphyrins. Author is Yang, Yuning; Li, Guijie; Mao, Xinbiao; She, Yuanbin.

A solvent-free and environment-friendly process for the oxidation of 4-ethylnitrobenzene to 4-nitroacetophenone promoted by metalloporphyrins was developed in a pressure reactor using O2 as a clean oxidant. The activities and reaction selectivities of the metalloporphyrins could be significantly affected by their central metal ions as well as the nature and position of the substituted groups, which were systematically investigated by employing more than 60 metalloporphyrins. Generally, the Fe(III)- and Mn(II)-porphyrins exhibited high activities. Moreover, metalloporphyrins with electron-withdrawing substituents on the para-positions of the Ph rings showed activities in the order T(p-Br)PPM < T(p-Cl)PPM < T(p-F)PPM. The substituent position effect on the activities of T(o-Cl)PPM > T(m-Cl)PPM > T(p-Cl)PPM and T(o-OMe)PPM < T(m-OMe)PPM < T(p-OMe)PPM were observed Furthermore, selectivities over 90.0% and a TON of 5370 could be achieved for the desired ketone. Especially, the T(p-Cl)PPMn demonstrated a selectivity of up to 93.6% and a conversion of 51.9% with only 3.3% acid and no alc. observed, and the selectivity was nearly the same for a large-scale experiment (100 g). As far as I know, this compound(28903-71-1)Formula: C48H38CoN4O4 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

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

Gupta, Aalo K.; Tolman, William B. published the article 《Copper/α-Ketocarboxylate Chemistry With Supporting Peralkylated Diamines: Reactivity of Copper(I) Complexes and Dicopper-Oxygen Intermediates》. Keywords: copper ketocarboxylate peralkylated diamine complex preparation oxygen reactivity; crystal structure copper ketocarboxylate peralkylated diamine complex; oxidative decarboxylation kinetics copper ketocarboxylate peralkylated diamine complex.They researched the compound: Mesitylcopper(I)( cas:75732-01-3 ).Name: 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.

To further understand Cu-promoted oxidation reactions, the Cu(I) complexes LCuX (L = N,N’-di-tert-butyl-N,N’-dimethylethylenediamine; X = benzoylformate (BF) or p-nitro-benzoylformate) were synthesized, fully characterized by x-ray crystallog. and spectroscopy in solution, and their reactivity with O2 at -80° examined Oxidative decarboxylation of the α-ketocarboxylate ligand was observed, but only to a significant extent when cyclohexene, cyclooctene, or MeCN was present. Spectroscopic and conductivity data are consistent with mechanistic postulates involving displacement of the α-ketocarboxylate by the additives to a small extent, followed by oxygenation of the LCu(I) moiety to yield Cu-O species that subsequently induce decarboxylation. To test these hypotheses, spectroscopic and kinetic studies of the reactions of Bu4NBF with preformed μ-η2:η2-peroxodicopper(II) and/or bis(μ-oxo)dicopper(III) complexes supported by L or N,N,N’,N’-tetramethylpropylenediamine were performed. In an illustration of a new mode of reactivity for such dicopper-O cores, decarboxylation of the added α-ketocarboxylate was observed and the intermediacy of a carboxylate-bridged μ-η2:η2-peroxodicopper(II) complex was implicated.

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

Related Products of 60827-45-4. 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: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Enhancing the detection sensitivity of trace analysis of pharmaceutical genotoxic impurities by chemical derivatization and coordination ion spray-mass spectrometry. Author is Bai, Lin; Sun, Mingjiang; An, Jianguo; Liu, David Q.; Chen, Ted K.; Kord, Alireza S..

Many pharmaceutical genotoxic impurities are neutral mols. Trace level anal. of these neutral analytes is hampered by their poor ionization efficiency in mass spectrometry (MS). Two anal. approaches including chem. derivatization and coordination ion spray-MS were developed to enhance neutral analyte detection sensitivity. The chem. derivatization approach converts analytes into highly ionizable or permanently charged derivatives, which become readily detectable by MS. The coordination ion spray-MS method, on the other hand, improves ionization by forming neutral-ion adducts with metal ions such as Na+, K+, or NH4 + which are introduced into the electrospray ionization source. Both approaches have been proven to be able to enhance the detection sensitivity of neutral pharmaceuticals dramatically. This article demonstrates the successful applications of the two approaches in the anal. of four pharmaceutical genotoxic impurities identified in a single drug development program, of which two are non-volatile alkyl chlorides and the other two are epoxides.

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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 Synthesis and structures of isopropyl-β-diketiminato copper(I) complexes, the main research direction is isopropyl beta diketiminato copper phosphine isocyanide preparation crystal structure; crystal mol structure isopropyl beta diketiminato copper phosphine isocyanide; diisopropylamino iminopentene preparation copper complexation.Electric Literature of C9H11Cu.

The reaction of N,N’-diisopropyl-2-amino-4-iminopent-2-ene (nacnaci-PrH, 1) either with CuOt-Bu or with a mixture of mesityl copper and 10% CuOt-Bu afforded, in the presence of PPh3, CN(C6Me2H3), or MeCN, the Lewis base coordinated complexes nacnaci-PrCuPPh3·0.5 C6H14 (2), nacnaci-PrCuCN(C6Me2H3) (3), and nacnaci-PrCu(NCMe) (4). Compounds 2, 3, and 4 were characterized by single-crystal x-ray diffraction studies. Compound 4 afforded two species in deuterated benzene in a 2:1 ratio, which were assigned to {nacnaci-PrCu}2(μ-NCMe) and nacnaci-PrCuNCMe (4). Upon addition of 5 equivalent of MeCN, the two sets collapsed into that of 4. No copper complexes were formed in the presence of styrene, stilbene, or diphenylacetylene.

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