Tag: M.W:100-200

Product Details of 53562-86-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Microreactors and microfluidic reactors for synthesis of fine chemicals. Author is Kluson, P.; Stavarek, P.; Hejda, S.; Penkavova, V.; Bendova, M.; Vychodilova, H..

The primary intention of this work was to bring information on the research, development, and construction of advanced microreactor platforms for the syntheses of fine chems. A brief overview was provided on the systems used for practical gas and liquid phase reactions, homogeneous and heterogeneous catalytic reactions, polymerizations, and also for reactions with involvement of light. Then an attention was paid to the tubular continuous microreactors, especially to those which are usually referred to as microfluidic chips. In the past, these microfluidic reactors have been used for various organic reactions in the field of fine chem. Finally, an algorithm has been described for a validation of the microtluidic reactor platform for flow conditions of specific solvents mixtures used in stereoselective hydrogenation of β-ketoesters with chiral metal complexes, and in the presence of specific ionic liquids

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

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: 53562-86-0, is researched, Molecular C5H10O3, about Enantioselective hydrogenation of β-keto esters with monodentate ligands, the main research direction is keto ester hydrogenation ruthenium chiral monodentate phosphine; hydroxy ester asym preparation; ruthenium chiral monodentate phosphine asym hydrogenation catalyst.Product Details of 53562-86-0.

Efficient and stable chiral monodentate phosphine ligands can be used in the ruthenium-catalyzed enantioselective hydrogenation of β-keto esters. The catalysts were remarkably temperature-tolerant, and high enantioselectivities were possible, even at 100-120°C.

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Reference:
Piperazine – Wikipedia,
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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.Wang, Shu-Ju; Zhang, Zhi-Qing; Jiang, Yi-Hui; Xiong, Gang; You, Li-Xin; Ding, Fu; Dragutan, Ileana; Dragutan, Valerian; Sun, Ya-Guang researched the compound: 1,10-Phenanthroline( cas:66-71-7 ).Name: 1,10-Phenanthroline.They published the article 《Versatile monometallic coordination polymers constructed from 4,4′-thiobis(methylene)bibenzoic acid and 1,10-phenanthroline. Synthesis, structure, magnetic and luminescence properties》 about this compound( cas:66-71-7 ) in Inorganica Chimica Acta. Keywords: preparation monometallic transition metal thiobismethylenebibenzoate phenanthroline coordination polymeric complex; crystal structure transition metal thiobismethylenebibenzoate phenanthroline coordination polymeric complex; thermal decomposition transition metal thiobismethylenebibenzoate phenanthroline coordination polymeric complex; fluorescence transition metal thiobismethylenebibenzoate phenanthroline coordination polymeric complex; magnetic property transition metal thiobismethylenebibenzoate phenanthroline coordination polymeric complex. We’ll tell you more about this compound (cas:66-71-7).

Four novel mononuclear coordination polymers [Co(tmba)(phen)(H2O)0.5]n (1), [Mn(tmba)(phen)]n (2), [Zn(tmba)(phen)]n (3) and [Cd(tmba)(phen)(H2O)]n (4), H2tmba = 4,4′-thiobis(methylene)bibenzoic acid, phen = 1,10-phenanthroline, were synthesized under hydrothermal conditions and characterized by single crystal X-ray diffraction, powder X-ray diffraction, IR spectroscopy, and TGA. Single crystal X-ray diffraction showed that compounds 1, 3 and 4 build 1D chains whereas complex 2 displays a 2D layer configuration. Magnetic susceptibility measurements indicate that compound 1 exhibits the coexistence of spin-orbit coupling and antiferromagnetic interaction in the binuclear Co(II) center. Compound 2 manifests an antiferromagnetic interaction within the Mn(II)-carboxyl chain. Moreover, based on the solid state emission spectra of compounds 3 and 4, and of H2tmba and phen, relevant fluorescence properties were studied.

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Piperazine – Wikipedia,
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《An improved rhodium-DIOP catalyst system for the homogeneous asymmetric hydrogenation of acetophenone》. Authors are Chan, Albert S. C.; Landis, Clark R..The article about the compound:(S)-1-(Dimethylamino)propan-2-olcas:53636-17-2,SMILESS:C[C@H](O)CN(C)C).Application In Synthesis of (S)-1-(Dimethylamino)propan-2-ol. Through the article, more information about this compound (cas:53636-17-2) is conveyed.

Optical yields as high as 79% were obtained in the title reaction when a rhodium-DIOP-chloride catalyst system containing a tertiary hydroxyalkylamine promoter was used. The various factors governing the rates and selectivities are discussed.

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Piperazine – Wikipedia,
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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.Herzberg, Gene R.; Rogerson, Minda researched the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0 ).Application In Synthesis of (S)-Methyl 3-hydroxybutanoate.They published the article 《Use of alcohol oxidase to measure the methanol produced during the hydrolysis of D- and L-methyl-3-hydroxybutyric acid》 about this compound( cas:53562-86-0 ) in Analytical Biochemistry. Keywords: methanol enzymic determination alc oxidase; alc primary enzymic determination oxidase; methyl hydroxybutyrate hydrolysis alc oxidase. We’ll tell you more about this compound (cas:53562-86-0).

An enzymic assay for the measurement of MeOH was developed. The assay uses alc. oxidase and peroxidase coupled to the oxidation of 2,2′-azino-di-(3-ethyl)-benzthiazoline-6-sulfonic acid as the chromogen. The assay is linear up to 50 nmol MeOH in a 200-μL sample and sensitive; 1.25 nmol of MeOH in a 200-μL sample can be measured. The assay is rapid and measurements can be made at any convenient time between 15 min and 4 h after initiation of the reaction. The assay shows highest activity with MeOH but significant activity with other primary alcs. up to 1-butanol. Little activity is shown with secondary alcs. and diols. This assay was used to follow the hydrolysis of the 2 isomers of the Me ester of 3-hydroxybutyric acid.

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Piperazine – Wikipedia,
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Genet, J. P.; Pinel, C.; Ratovelomanana-Vidal, V.; Mallart, S.; Pfister, X.; Bischoff, L.; Cano De Andrade, M. C.; Darses, S.; Galopin, C. published an article about the compound: (S)-Methyl 3-hydroxybutanoate( cas:53562-86-0,SMILESS:C[C@H](O)CC(OC)=O ).Application of 53562-86-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:53562-86-0) through the article.

The new class of 2-methylallyl ruthenium chiral diphosphines (P*P)RuII(2-methylallyl)2 (1, P*P = chiral diphosphine) are efficient in asym. hydrogenation of α,β unsaturated acids and allylic alcs. The related chiral halogen-containing ruthenium catalysts (P*P)RuIIX2 (X = halogen) are prepared from 1 or in situ from (COD)Ru[η3-(CH2)2CHCH3]2 by ligand exchange with the chelating diphosphine followed by protonation (HX) in acetone. This procedure allows rapid screening of chiral phosphines, such as Diop, Chiraphos, Cbd, Bppm, Binap, β-glucophos, Biphemp, MeO-Biphep, Me-Duphos, in ruthenium mediated hydrogenations of prochiral substrates. A high efficiency is displayed by Ru-catalysts having atropisomeric ligands (e.e. up to 99%) and a C2 sym. bis(phospholane) has also emerged as a valuable ligand (Me-Duphos, e.e. up to 87% not optimized). Asym. hydrogenation of β-keto esters can be conducted under quite mild conditions (4 atm. of H2, 50°, e.e. up to 99%). β-Keto esters having a disubstituted double bond are also hydrogenated chemoselectively to unsaturated chiral alcs. under controlled conditions with excellent optical purities.

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Leng, Wancong; Cui, Leilei; Liu, Yang; Gong, Yun published the article 《MOF-Derived MnV2O4/C Microparticles with Graphene Coating Anchored on Graphite Sheets: Oxygen Defect Engaged High Performance Aqueous Zinc-Ion Battery》. Keywords: metal organic framework manganese vanadium oxide zinc ion battery.They researched the compound: 1,10-Phenanthroline( cas:66-71-7 ).SDS of cas: 66-71-7. 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:66-71-7) here.

By annealing [Mn(phen)H2O][V2O6] (phen = 1,10-phenanthroline) in the presence of graphite template, MnV2O4 /C microparticles are obtained, in which MnV2O4 particles with one-layer or few-layer coating of graphene are anchored on the graphite sheets. The optimal sample, MnV2O4(p)/C-700 with a high carbon content (35.3 at %) can deliver a large specific capacity of 410 mAh g-1 at 0.1 A g-1 with a high capacity retention of 94.3 % over 1000 discharge/charge cycles at 20 A g-1 as cathode in zinc-ion battery. Ex situ X-ray diffraction, SEM, energy-dispersive X-ray spectra, as well as elemental mappings and XPS of MnV2O4(p)/C-700 discern the partial phase transformation mechanism of MnV2O4→Zn3(OH)2V2O7(H2O)2 during discharge/charge process. It is because the rich oxygen defects of MnV2O4 can improve elec. conductivity, favor the electron transfer from V→Mn/O, thus facilitate the binding of Zn2+, and the captured Zn2+ cannot be extracted, as evidenced by d. functional theory calculations Furthermore, it is found that O-deficiency can capture the water shell from the hydrated Zn2+, then the dehydrated Zn2+ is easy to insert into MnV2O4 with lower migration barrier of Zn2+ (0.84 eV), leading to the structural reversibility of MnV2O4 in cycling test.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,10-Phenanthroline( cas:66-71-7 ) is researched.Synthetic Route of C12H8N2.Jannapu Reddy, Raju; Waheed, Md.; Haritha Kumari, Arram; Rama Krishna, Gamidi published the article 《Interrupted CuAAC-Thiolation for the Construction of 1,2,3-Triazole-Fused Eight-Membered Heterocycles from O-/N-Propargyl derived Benzyl Thiosulfonates with Organic Azides》 about this compound( cas:66-71-7 ) in Advanced Synthesis & Catalysis. Keywords: benzoxathiocino benzothiazocino triazole preparation; propargyl benzyl thiosulfonate organic azide tandem cycloaddition thiolation. Let’s learn more about this compound (cas:66-71-7).

A copper(I)-catalyzed interrupted click-sulfenylation of O-/N-propargyl benzyl thiosulfonates with organic azides has been disclosed. The unified CuAAC-thiolation provides a wide range of triazole-fused eight-membered heterocycles in good to high (51-94%) yields under mild reaction conditions. Moreover, a three-component reaction is also achieved involving O-/N-propargyl benzyl thiosulfonates, benzyl bromide, and sodium azide to deliver fused-triazoles in 61-74% yields. From a synthetic point of view, the present protocol has been demonstrated at gram-scale reactions. A plausible mechanism is also proposed based on exptl. results and control experiments

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Quality Control of (S)-Methyl 3-hydroxybutanoate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Analysis of optical rotatory dispersion and circular dichroism of the helical conformation of poly(β-hydroxybutyrate) in solution. Author is Delsarte, J.; Weill, G..

The rotary strengths of the n-π* transition of the carbonyl chromophore of poly(β-hydroxybutyrate) in trifluoroethanol was at least twice as intense as that in model compounds, and the π-π transition was split into 2 bands. The use of ORD and CD measurements for the determination of the conformation of the polymer was discussed.

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Piperazine – Wikipedia,
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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.Sun, Longjiang; Li, Qi; Zheng, Mang; Lin, Siying; Guo, Changliang; Luo, Laiyu; Guo, Shien; Li, Yuxin; Wang, Cheng; Jiang, Baojiang researched the compound: 1,10-Phenanthroline( cas:66-71-7 ).Product Details of 66-71-7.They published the article 《Efficient Suzuki-Miyaura cross-coupling reaction by loading trace Pd nanoparticles onto copper-complex-derived Cu/C-700 solid support》 about this compound( cas:66-71-7 ) in Journal of Colloid and Interface Science. Keywords: copper palladium nanocomposite catalyst preparation crystal structure; iodobenzene phenylboronic acid copper palladium catalyst Suzuki coupling; biphenyl preparation; Cu/C composite materials; Mononuclear copper complex; Suzuki-Miyaura cross-coupling (SMC) reaction; Synergistic effect; Trace Pd loading. We’ll tell you more about this compound (cas:66-71-7).

The development of efficient carbon-carbon cross-coupling catalysts with low noble metal amounts attracts much attention recently. Herein, a Cu/C-700/Pd nanocomposite is obtained by loading trace Pd2+ onto carbon support derived from a novel mononuclear copper complex, {[Cu(POP)2(Phen)2]BF4}. The as-prepared nanomaterial features the facial structure of highly dispersed copper phosphide nanoparticles as well as Pd nanoparticles via neighboring Cu-Pd sites. The Cu/C-700/Pd nanocomposite shows excellent catalytic activity (99.73%) and selectivity in Suzuki-Miyaura cross-coupling reaction, at trace Pd loading (0.43 mol%). Compared with the reported palladium nano catalysts, its advantages are proved. The appealing gateway to this stable, innovative and recyclability, Cu/C-700/Pd nanostructure recommends its beneficial utilization in carbon-carbon coupling and other environmentally friendly processes.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics