Category: piperazines

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, Category: piperazines, 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, SMILES is NC1=CC=C(N2CCN(C)CC2)C=C1, belongs to piperazines compound. In a document, author is Behroozi, Amir Hossein, introduce the new discover.

CO2 Reactive Absorption into an Aqueous Blended MDEA and TMS Solution: Experimental and Modeling

In this research, the significant environmental process of CO2 capture is investigated into an aqueous blended MDEA + TMS solution using a stirrer reactor experimentally and numerically. The experiments were designed based on the response surface methodology (RSM) under operating conditions of a pressure range of 2-8 bar, a temperature range of 20-70 degrees C, MDEA, and TMS concentration range of 10-20 wt%. The results indicated that by enhancing the initial pressure from 3.5 to 8 bar, the equilibrium CO2 loading increases by 17.8%. Based on RSM and central composite design method, the maximum values of CO2 loading and absorption percentages were 0.308% and 72.73%, respectively, at appropriate conditions of the temperature of 32.5 degrees C, the pressure of 3.5 bar, and MDEA and TMS concentrations of 12.5 wt%. A new relation for CO2 loading was correlated with a correlation coefficient of 0.994, as a function of studied independent variables.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 16153-81-4 is helpful to your research. Category: piperazines.

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

Electric Literature of 130307-08-3, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 130307-08-3, Name is 1-(4-Bromophenyl)-4-methylpiperazine, SMILES is CN1CCN(C2=CC=C(Br)C=C2)CC1, belongs to piperazines compound. In a article, author is Hosseini, Mahdiyeh-Sadat, introduce new discover of the category.

Fabrication of new magnetite based sulfonic-phosphotungstic dual-acid catalyst for catalytic acetalization of benzaldehyde with ethylene glycol

A new sulfonic-phosphotungstic dual-acid hybrid catalyst based on silica coated magnetite nanoparticles (SCMNPs) containing two types of Bronsted acidic sites i.e. sulfonic acid (-SO3H) and phosphotungstic acid (HPW) groups, was prepared with chemical and electrostatic interactions of these acidic functional moieties with piperazine-grafted propylsilyl spacer groups. Physicochemical techniques including FT-IR spectroscopy, elemental analysis and inductively coupled plasma-optical emission spectroscopy (ICP-OES), vibrating sample magnetometry (VSM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the prepared solid acid catalyst. Acetalization reaction between benzaldehyde and ethylene glycol was done to investigate the catalytic activity of prepared catalyst and 97% conversion toward acetal production was reached in short reaction time. The lower conversion was also achieved for the same catalyst without any HPW species, demonstrated the positive role of the second acidic sites on progression of this reaction. In addition, this easily separable solid acid catalyst reused for four runs with no observable loss in benzaldehyde conversion.

Electric Literature of 130307-08-3, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 130307-08-3 is helpful to your research.

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

Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.5294-61-1, Name is N-(2,6-Dimethylphenyl)-2-(piperazin-1-yl)acetamide, SMILES is O=C(NC1=C(C)C=CC=C1C)CN2CCNCC2, belongs to piperazines compound. In a document, author is El Abbouchi, Abdelmoula, introduce the new discover, Computed Properties of C14H21N3O.

Synthesis and biological evaluation of ethacrynic acid derivatives bearing sulfonamides as potent anti-cancer agents

A series of ethacrynic acid (2-[2,3-dichloro-4-(2- methylidenebutanoyephenoxy]acetic acid) (EA, Edecrin) containing sulfonamides linked via three types of linkers namely 1,2-ethylenediamine, piperazine and 4-aminopiperidine was synthesized and subsequently evaluated in vitro against HL60 and HCT116 cancer cell lines. All the EA analogs, excluding 6a and 6c, showed anti-proliferative activity with IC50, in the micromolar range (less than 4 uM). Three derivatives 6b, 7 b and 7 e were selected for their interesting dual activity on HL60 cell line in order to be further evaluated against a panel of cancer cell lines (HCT116, A549, MCF7, PC3, U87-MG and SKOV3) as well as on MRCS as a normal cell line. These compounds displayed IC50 values in nanomolar range against A549, MCF7, PC3 and HCT116 cell lines, deducing the discovery that piperazine or 4-aminopiperidine is the linker’s best choice to develop EA analogs with highly potent anti-proliferative activities own up to 24 nM. Besides, in terms of selectivity, those linkers are more suitable offering safety ratios of up to 63.8.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 5294-61-1 is helpful to your research. Computed Properties of C14H21N3O.

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

Synthetic Route of 111974-74-4, Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 111974-74-4, Name is 11-(1-Piperazinyl)-dibenzo[b,f][1,4]thiazepine dihydrochloride, SMILES is [H]Cl.[H]Cl.C12=CC=CC=C1N=C(N3CCNCC3)C4=CC=CC=C4S2, belongs to piperazines compound. In a article, author is Rodriguez-Lavado, Julio, introduce new discover of the category.

Synthesis, in vitro evaluation and molecular docking of a new class of indolylpropyl benzamidopiperazines as dual AChE and SERT ligands for Alzheimer’s disease

During the last decade, the one drug-one target strategy has resulted to be inefficient in facing diseases with complex ethiology like Alzheimer’s disease and many others. In this context, the multitarget paradigm has emerged as a promising strategy. Based on this consideration, we aim to develop novel molecules as promiscuous ligands acting in two or more targets at the same time. For such purpose, a new series of indolylpropyl-piperazinyl oxoethyl-benzamido piperazines were synthesized and evaluated as multitarget-directed drugs for the serotonin transporter (SERT) and acetylcholinesterase (AChE). The ability to decrease beta-amyloid levels as well as cell toxicity of all compounds were also measured. In vitro results showed that at least four compounds displayed promising activity against SERT and AChE. Compounds 18 and 19 (IC50 = 3.4 and 3.6 mu M respectively) exhibited AChE inhibition profile in the same order of magnitude as donepezil (DPZ, IC50 = 2.17 mu M), also displaying nanomolar affinity in SERT. Moreover, compounds 17 and 24 displayed high SERT affinities (IC50 = 9.2 and 1.9 nM respectively) similar to the antidepressant citalopram, and significant micromolar AChE activity at the same time. All the bioactive compounds showed a low toxicity profile in the range of concentrations studied. Molecular docking allowed us to rationalize the binding mode of the synthesized compounds in both targets. In addition, we also show that compounds 11 and 25 exhibit significant beta-amyloid lowering activity in a cell-based assay, 11 (50% inhibition, 10 mu M) and 25 (35% inhibition, 10 mu M). These results suggest that indolylpropyl benzamidopiperazines based compounds constitute promising leads for a multitargeted approach for Alzheimers disease. (C) 2020 Elsevier Masson SAS. All rights reserved.

Synthetic Route of 111974-74-4, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 111974-74-4.

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

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, Application In Synthesis of 4-(4-Methylpiperazin-1-yl)phenylamine, 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, SMILES is NC1=CC=C(N2CCN(C)CC2)C=C1, belongs to piperazines compound. In a document, author is Listro, Roberta, introduce the new discover.

Exploring the RC-106 Chemical Space: Design and Synthesis of Novel (E)-1-(3-Arylbut-2-en-1-yl)-4-(Substituted) Piperazine Derivatives as Potential Anticancer Agents

Despite the fact that significant advances in treatment of common cancers have been achieved over the years, orphan tumors still represent an important unmet medical need. Due to their complex multifactorial origin and limited number of cases, such pathologies often have very limited treatment options and poor prognosis. In the search for new anticancer agents, our group recently identifiedRC-106, a Sigma receptor modulator endowed with proteasome inhibition activity. This compound showed antiproliferative activity toward different cancer cell lines, among them glioblastoma (GB) and multiple myeloma (MM), two currently unmet medical conditions. In this work, we directed our efforts toward the exploration of chemical space aroundRC-106to identify new active compounds potentially useful in cancer treatment. Thanks to a combinatorial approach, we prepared 41 derivatives of the compound and evaluated their cytotoxic potential against MM and GB. Three novel potential anticancer agents have been identified.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 16153-81-4. Application In Synthesis of 4-(4-Methylpiperazin-1-yl)phenylamine.

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

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , SDS of cas: 16153-81-4, 16153-81-4, Name is 4-(4-Methylpiperazin-1-yl)phenylamine, molecular formula is C11H17N3, belongs to piperazines compound. In a document, author is Zahradnikova, Eva, introduce the new discover.

Late first-row transition metal complexes of a 17-membered piperazine-based macrocyclic ligand: structures and magnetism

A 17-membered piperazine-based macrocyclic ligandL(diProp)(1,5,13,17,22-pentaazatricyclo[15.2.2.17,11]docosa-7,9,11(22)-triene) was resynthesized in high yield by using a linear pump. Its Mn(ii), Fe(ii), Co(ii) and Ni(ii) complexes of the general formula [MnLdiProp(ClO4)(2)] (1), [FeLdiProp(CH3CN)](ClO4)(2)(2), [CoLdiProp(CH3CN)](ClO4)(2)(3), [NiLdiProp](ClO4)(2)(4) were prepared and thoroughly characterized. X-ray diffraction analysis confirmed that Mn(ii) complex1has capped trigonal prismatic geometry with a coordination number of seven, Fe(ii) and Co(ii) complexes2and3are trigonal prismatic with a coordination number of six and Ni(ii) complex4has square pyramidal geometry with a coordination number of five. The decrease of the coordination number is accompanied by a shortening of M-N distances and an increase of torsion of the piperazine ring from the equatorial plane. Magnetic measurement reveals moderate anisotropy for4and rather large magnetic anisotropy for2and3(axial zero-field splitting parameterD(Ni) = 9.0 cm(-1),D(Fe) = -14.4 cm(-1),D(Co) = -25.8 cm(-1), together with rather high rhombicity). Co(ii) complex3behaves as a field-induced SMM with a combination of Raman and direct or Orbach and direct relaxation mechanisms. Obtained magnetic data were extensively supported by theoretical CASSCF calculations. The flexibility and rather large 17-membered macrocyclic cavity of ligandL(diProp)could be responsible for the variation of coordination numbers and geometries for the investigated late-first row transition metals.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 16153-81-4. SDS of cas: 16153-81-4.

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

Chemistry is an experimental science, HPLC of Formula: C10H20N2O2, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 147081-29-6, Name is (S)-tert-Butyl 3-methylpiperazine-1-carboxylate, molecular formula is C10H20N2O2, belongs to piperazines compound. In a document, author is Tian, Long.

Graphene oxide interlayered thin-film nanocomposite hollow fiber nanofiltration membranes with enhanced aqueous electrolyte separation performance

In this study, a kind of thin-film nanocomposite (TFN) hollow fiber nanofiltration (NF) membranes was fabricated via incorporating graphene oxide (GO) interlayer using the interfacial polymerization (IP) reaction between piperazine (PIP) and trimesoyl chloride (TMC). The surface morphology and cross-sectional structure of the fabricated TFN hollow fiber NF membrane were extensively investigated. The effects of the PIP concentration, species of the aqueous additives, and the GO loading on the structure and performance of the hollow fiber NF membrane were also investigated in detail and the optimal preparation conditions were achieved. Fourier transform infrared spectroscopy (FTIR) confirmed the successful introduction of the GO interlayer into the composite hollow fiber NF membrane. Moreover, the incorporation of GO interlayer helped to reduce the skin thickness of the composite hollow fiber NF membrane remarkably, and thus helped to increase greatly the water permeance while maintaining a high salt rejection. Under an optimal GO loading of 20.0 mg m(-2), the TFN hollow fiber NF membrane achieved a water permeance of 80 L m(-2) h(-1) MPa-1 and a Na2SO4 rejection of 96.1% for 2000 mg L-1 aqueous Na2SO4 solution, much higher than the interlayer-free thin-film composite (TFC) membrane. Meanwhile, the TFN hollow fiber NF membrane showed an excellent selectivity of Na2SO4 over NaCl, as well as good fouling resistance and long-term stability, demonstrating the vast potential in application for the selective separation of monovalent salt and divalent salt.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 147081-29-6, in my other articles. HPLC of Formula: C10H20N2O2.

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

Chemistry is an experimental science, Name: 1-Benzhydrylpiperazine, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 841-77-0, Name is 1-Benzhydrylpiperazine, molecular formula is C17H20N2, belongs to piperazines compound. In a document, author is Yuan, Xueling.

Enhanced research of absorption by mass transfer promoters

Activators such as piperazine (PZ) are widely used to increase the CO2 absorption rate of aqueous methyl-diethanolamine (MDEA) solutions by accelerating reaction. However, a big difference (1 to 2 orders of magnitude) in the enhancement of absorption rate with the addition of PZ was obtained in different studies. In this work, it was proved that mass transfer is the rate-limiting step in the above process and in most cases enhancing mass transfer is quite essential. Some low-polar solvents were screened as mass transfer promoters (MTPs) to enhance mass transfer by inducing interfacial turbulence, which markedly improved the CO2 absorption performance of MDEA solutions. The individual addition of PZ and MTPs to the MDEA solution, which correspond to the reaction enhancement and the mass transfer enhancement, increased the absorption rate by 131% and 33%-319%, respectively. The co-effects of enhancing both reaction and mass transfer (in the presence of activators and MTPs) can lead to 2 to 10-fold increase in the absorption rate. Furthermore, MTPs could increase the CO2 cyclic loading and desorption rate by 27% and 100%, respectively, indicating that the MDEA/MTPs had significant advantages for reducing the energy consumption in CO2 capture applications.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 841-77-0. Name: 1-Benzhydrylpiperazine.

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

Electric Literature of 106261-49-8, Redox catalysis has been broadly utilized in electrochemical synthesis due to its kinetic advantages over direct electrolysis. The appropriate choice of redox mediator can avoid electrode passivation and overpotential. 106261-49-8, Name is 4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride, SMILES is Cl.Cl.CN1CCN(CC1)CC2=CC=C(C(=O)O)C=C2, belongs to piperazines compound. In a article, author is Khazaee, Asma, introduce new discover of the category.

Immobilized piperazine on the surface of graphene oxide as a heterogeneous bifunctional acid-base catalyst for the multicomponent synthesis of 2-amino-3-cyano-4H-chromenes

Immobilized piperazine on the surface of graphene oxide (piperazine-GO) is synthesized and characterized by different methods such as FT-IR, solid-state(29)Si{H-1} and(13)C{H-1} CP/MAS NMR, elemental analysis, TGA, TEM, FE-SEM, XPS, and TPD. Subsequently, it is used as a heterogeneous bifunctional acid-base catalyst for the efficient multicomponent reaction of malononitrile, different active compounds containing enolizable C-H bonds and various aryl/alkyl aldehydes in aqueous ethanol. A wide variety of 2-amino-3-cyano-4H-chromenes are synthesized in the presence of this heterogeneous catalyst in good to high yields and with short reaction times. The catalyst is easily separated and reused for at least six times without significant loss of activity. The acidic nature of GO improves the catalytic activity of the supported piperazine and also provides heterogeneity to the catalyst. Use of aqueous ethanol as a green solvent, high turnover numbers (TON), facile catalyst recovery and reuse, simple work-up and generality of the method make this protocol an environmentally benign procedure for the synthesis of the title heterocycles.

Electric Literature of 106261-49-8, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 106261-49-8 is helpful to your research.

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

Reference of 109-01-3, Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. 109-01-3, Name is 1-Methylpiperazine, SMILES is CN1CCNCC1, belongs to piperazines compound. In a article, author is Wei, Xiuzhen, introduce new discover of the category.

Graphene oxide/multi-walled carbon nanotubes nanocompsite polyamide nanofiltration membrane for dyeing-printing wastewater treatment

Graphene oxide (GO)/multi-walled carbon nanotubes (MWCNTs) modified nanofiltration (NF) membranes were successfully fabricated by interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride (TMC). Compared with the pristine polyamide (PA) membrane and GO membrane, the typical structure of the granular protrusions on the surface of the GO/MWCNTs membrane gradually disappeared, and a regular ordered morphology appeared. The membrane thickness and surface roughness were increased according to the results of field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM). The contact angle of GO/MWCNTs NF membranes progressively decreased from 57 degrees to 23 degrees, indicating the enhancement of surface hydrophilicity. The best NF performance was achieved when the ratio of GO to MWCNTs was 6:3 (G-M-3). The water flux was 55.6 L/m(2).h, which was 33.7% higher than that of the GO membrane, and the rejection rate for Na(2)SO(4)was maintained at approximately 94%. Both modified NF membranes could treat actual dyeing-printing wastewater effectively. The anti-fouling performance of G-M-3 was better than that of G3. Therefore, GO/MWCNTs-modified NF membranes have a good application prospects in the field of wastewater treatment and water purification.

Reference of 109-01-3, Because enzymes can increase reaction rates by enormous factors and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 109-01-3.

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