Category: piperazines

Recommanded Product: 66-71-7. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,10-Phenanthroline, is researched, Molecular C12H8N2, CAS is 66-71-7, about Rationalization on high-loading iron and cobalt dual metal single atoms and mechanistic insight into the oxygen reduction reaction. Author is Jiang, Min; Wang, Fei; Yang, Fan; He, Hao; Yang, Jian; Zhang, Wei; Luo, Jiayan; Zhang, Jiao; Fu, Chaopeng.

Rational design of single-atom catalysts (SACs) with high metal loadings is essential to enhance the sluggish kinetics of oxygen reduction reactions in metal-air batteries and proton-exchange membrane fuel cells (PEMFCs). Herein, an effective plasma engineering strategy to construct Fe/Co dual single atoms densely dispersed on porous nitrogen-doped carbon nanofibers (Fe, Co SAs-PNCF) with a high mass loading of 9.8 wt% is proposed without any acid leaching. The electrocatalyst exhibits superior ORR performances in both alk. and acidic media (e.g., Eonset = 1.04 V and E1/2 = 0.93 V). The N3-Fe-Co-N3 moieties are identified to be the main active sites by X-ray absorption spectroscopy (XAS) and d. functional theory calculations The in situ XAS and Raman spectroscopy quantitively reveal the decrease in oxidation states of Fe/Co and the increase in bond lengths of the Fe-N/Co-N in the N3-Fe-Co-N3 during the ORR. Benefitting from the high loading of single atoms and enhanced activity, the Fe, Co SAs-PNCF endows the Al-air batteries and PEMFCs with excellent discharge performances, demonstrating promising practical applications.

In addition to the literature in the link below, there is a lot of literature about this compound(1,10-Phenanthroline)Recommanded Product: 66-71-7, illustrating the importance and wide applicability of this compound(66-71-7).

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Bromopriopionaldehydediethylacetal( cas:3400-55-3 ) is researched.Application of 3400-55-3.Migulin, Vasily A.; Krayushkin, Michael M.; Barachevsky, Valery A.; Kobeleva, Olga I.; Novikov, Valentin V.; Lyssenko, Konstantin A. published the article 《Synthesis and studies of symmetric dibenzothienylcyclopentenes》 about this compound( cas:3400-55-3 ) in Tetrahedron. Keywords: sym dibenzothienylcyclopentene photochromism crystal structure DFT. Let’s learn more about this compound (cas:3400-55-3).

Various sym. 5,5′-substituted dibenzo[b]thienylcyclopentenes were synthesized from the corresponding dibromide with a formation of new C-C, C-N, C-O, C-Si, and C-I bonds. The influence of the introduced substituent on the photochromic properties of the obtained compounds was systematically researched in both solution and solid state. The ratio of antiparallel and parallel conformers in solution was determined by NMR spectroscopy. Only one compound of the series-5,5′-diphenoxy-substituted-has displayed photochromism in the single crystal. High resolution x-ray diffraction showed that intermol. S···π and S···H contacts kept two benzothiophene rings together in the mol., hence decreasing the distance between the two reactive centers responsible for the photocyclization reaction. DFT calculations of the isolated mols. appeared to be in good agreement with the obtained x-ray diffraction data, and therefore could also essentially assist a researcher in the design of photochromic mols.

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

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3-Iodo-1H-indazol-5-amine, is researched, Molecular C7H6IN3, CAS is 599183-36-5, about 3H-Pyrazolo[4,3-f]quinoline-Based Kinase Inhibitors Inhibit the Proliferation of Acute Myeloid Leukemia Cells In Vivo, the main research direction is pyrazoloquinoline preparation antitumor activity tyrosine kinase inhibition mol docking.Category: piperazines.

Herein, various 3H-pyrazolo[4,3-f]quinoline-containing compounds e.g., I were rapidly assembled via the Doebner-Povarov multicomponent reaction from the readily available 5-aminoindazoles, ketones and aldehydes in good yields. The most active compounds potently inhibit the recombinant FLT3 kinase and its mutant forms with nanomolar IC50 values. Docking studies with the FLT3 kinase showed a type I binding mode, where the 3H-pyrazolo group interacts with Cys694 in the hinge region. The compounds blocked the proliferation of AML cell lines harboring oncogenic FLT3-ITD mutations with remarkable IC50 values, which were comparable to the approved FLT3 inhibitor quizartinib. The compounds also inhibited the growth of leukemia in a mouse-disseminated AML model, and hence, the novel 3H-pyrazolo[4,3-f]quinoline-containing kinase inhibitors are potential lead compounds to develop into anticancer agents, especially for kinase-driven cancers.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (S)-1-(Dimethylamino)propan-2-ol( cas:53636-17-2 ) is researched.COA of Formula: C5H13NO.Gennari, Cesare; Molinari, Francesco; Cozzi, PierGiorgio; Oliva, Ambrogio published the article 《Auxiliary structure and asymmetric induction in the Mukaiyama-aldol reactions of chiral silyl ketene acetals》 about this compound( cas:53636-17-2 ) in Tetrahedron Letters. Keywords: auxiliary structure asym induction Mukaiyama aldol; silyl ketene acetal asym condensation aldehyde. Let’s learn more about this compound (cas:53636-17-2).

A variety of chiral auxiliaries [e.g., (1S,2R-Me2NCHMeCHPhOH, (S)-Me2NCH2CHMeOH] were prepared and tested for levels of asym. induction control in the Mukaiyama-aldol reaction of chiral silyl ketene acetals. Structural features required for high levels of control are discussed.

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

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 Asymmetric synthesis by Ru-BINAP, published in 1995, which mentions a compound: 53636-17-2, mainly applied to ruthenium dinaphthylphosphine complex asym hydrogenation catalyst; phosphinobinaphthyl ruthenium complex asym hydrogenation catalyst, Synthetic Route of C5H13NO.

Chiral compounds were obtained in extremely high enantiomeric excesses by the Ru-BINAP catalysis. The catalysts are capable to hydrogenate numerous unsaturated substrates. The effect of substituents in ketones for enantio- and diastereo-differentiations is discussed. Practical applications in the production of pharmaceuticals and new materials are also described.

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

Synthetic Route of C8H8FN. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Novel purine conjugates with N-heterocycles: synthesis and anti-influenza activity. Author is Krasnov, Victor P.; Zarubaev, Vladimir V.; Gruzdev, Dmitry A.; Vozdvizhenskaya, Olga A.; Vakarov, Sergey A.; Musiyak, Vera V.; Chulakov, Evgeny N.; Volobueva, Alexandrina S.; Sinegubova, Ekaterina O.; Ezhikova, Marina A.; Kodess, Mikhail I.; Levit, Galina L.; Charushin, Valery N..

A number of novel amides were synthesized by coupling of 6-[(9H-purin-6-yl)amino]hexanoic acid to heterocyclic amines. The antiviral activity of the obtained compounds, as well as of purine conjugates in which 7,8-difluoro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine is linked to position 6 of purine through a fragment of ω-amino acids with varying lengths of polymethylene chains against influenza A and B viruses was studied in vitro. Purine derivatives showed to have moderate activity against influenza A (H1N1) virus. The antiinfluenza activity and cytotoxicity of conjugates with 7,8-difluoro-3-methyl-3,4-dihydro-2H-1,4-benzoxazine depend on the length of the linker fragment.

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

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.Qhobosheane, Malikotsi A.; Beteck, Richard M.; Baratte, Blandine; Robert, Thomas; Ruchaud, Sandrine; Bach, Stephane; Legoabe, Lesetja J. researched the compound: 1-(Bromomethyl)-4-iodobenzene( cas:16004-15-2 ).SDS of cas: 16004-15-2.They published the article 《Exploration of 7-azaindole-coumaranone hybrids and their analogues as protein kinase inhibitors》 about this compound( cas:16004-15-2 ) in Chemico-Biological Interactions. Keywords: azaindole coumaranone anticancer agent protein kinase inhibitor; 7-Azaindole; Anticancer drugs; Coumaranone; GSK-3β; Haspin; Leishmanicidal drugs; LmCK1; Polypharmacology; Protein kinase. We’ll tell you more about this compound (cas:16004-15-2).

7-Azaindole has been labeled a privileged scaffold for the design of new potent inhibitors of protein kinases. In this paper, we determined the inhibition profiles of novel mono- and disubstituted derivatives of 7-azaindole-coumaranone hybrids on various disease-related protein kinases. Eight hit compounds were identified, including a potent Haspin inhibitor with an IC50 value of 0.15 μM. An interesting observation was that all active monosubstituted compounds displayed dual inhibition for Haspin and GSK-3β, while disubstituted derivatives inhibited GSK-3β and LmCK1 from Leishmania major parasite. Analyses of structure activity relationships (SARs) also revealed that mono-substitution with para-fluorobenzyloxy ring produced an equipotent inhibition of Haspin and GSK-3β. Haspin and GSK-3β are relevant targets for developing new anticancer agents while LmCK1 is an innovative target for leishmanicidal drugs. Novel compounds reported in this paper constitute promising starting points for the development of new anticancer and leishmanicidal drugs.

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

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Synthesis, characterization and reactivity of lanthanide(II) poly(pyrazol-1-yl)borates (Ln = Sm, Eu and Yb); fluorescence studies of [EuL2(THF)2] [L = B(pz)4 HB(pz)3]; x-ray crystal structures of [Eu{B(pz)4}2(THF)2] and [Yb{B(pz)4}3].C2H5OH, the main research direction is crystal structure europium ytterbium hydrotrispyrazolylborate tetrapyrazolylborate; structure europium ytterbium hydrotrispyrazolylborate tetrapyrazolylborate; rare earth hydrotrispyrazolylborate tetrapyrazolylborate; pyrazolylborate rare earth preparation fluxionality; fluorescence europium hydrotrispyrazolylborate tetrapyrazolylborate; fluxionality rare earth hydrotrispyrazolylborate tetrapyrazolylborate.Synthetic Route of C9H10BKN6.

The reaction [LnI2(THF)x] (Ln = Sm, Eu, Yb) with 2 equiv of K[B(pz)4] (pz = pyrazolyl) in THF gave [Ln{B(pz)4}2(THF)2] complexes. The mol. structure of [Eu{B(pz)4}2(THF)2] was determined by single-crystal x-ray diffraction anal. The [Sm{B(pz)4}2(THF)2] and [Yb{B(pz)4}2(THF)2] complexes are fluxional in solution, as indicated by the equivalence of the pyrazolyl rings in the 1H NMR spectra at room temperature A static spectrum could be obtained for the Sm compound at -68° with a pattern that is in accordance with the geometry found for the Eu complex, in the solid state. [Ln{HB(pz)3}2(THF)2] (Ln = Sm, Eu, Yb) were prepared by the procedure used to synthesize the [Ln{B(pz)4}2(THF)2] complexes. The THF mols. can be replaced by 1,2-dimethoxyethane yielding [Ln{HB(pz)3}2(DME)] (Ln = Sm, Yb). [Sm{B(pz)4}2(THF)2] and [Yb{B(pz)4}2(THF)2] react readily with alkyl halides, alcs. or alkynes to yield LnIII complexes that disproportionate to the [Ln{B(pz)4}3] complexes. The crystal structure of [Yb{B(pz)4}3].EtOH obtained in the reaction of [Yb{B(pz)4}2(THF)2] with EtOH was determined by x-ray diffraction anal. Fluorescence studies on the Eu compounds are also reported.

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

Reference of 1-(Bromomethyl)-4-iodobenzene. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1-(Bromomethyl)-4-iodobenzene, is researched, Molecular C7H6BrI, CAS is 16004-15-2, about Regioselective approach to colchiceine tropolone ring functionalization at C(9) and C(10) yielding new anticancer hybrid derivatives containing heterocyclic structural motifs. Author is Pyta, Krystian; Skrzypczak, Natalia; Ruszkowski, Piotr; Bartl, Franz; Przybylski, Piotr.

The influence of base type, temperature and solvent on regioselective C(9)/C(10) “”click”” modifications within the tropolone ring of colchiceine I [ R = OH] was investigated. New ether derivatives bearing alkyne, azide, vinyl, or halide aryl groups enabled assembly of the alkaloid part with heterocycles or important biomols. such as saccharides, geldanamycin or AZT into hybrid scaffolds by dipolar cycloaddition (CuAAC) or Heck reaction. Compared to colchicine I = [ R = OCH3] or colchiceine I [ R = OH], ether congeners, as e.g. II [ R = but-2-enyl] [IC50s(3e) 0.9nM], showed improved or similar anticancer effects, whereby the bulkiness of the substituents and the substitution pattern of the tropolone proved to be essential. Biol. studies revealed that expand-ing the ether arms by terminal basic heterocycles as quinoline or pyridine, decreases the toxicity in HDFcells at high anticancer potency (IC50s 1-2nM). Docking of ether and hybrid derivatives into the colchicine pocket of αGTP/β tubulin dimers revealed a relationship between the favorable binding mode and the attractive anticancer potency.

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

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 The role of the solvent in the asymmetric hydrogenation of β-keto esters with Ru-BINAP, published in 2003-05-01, which mentions a compound: 53562-86-0, mainly applied to solvent asym hydrogenation keto ester ruthenium BINAP; transition metal solvent asym hydrogenation keto ester ruthenium BINAP; alkane asym hydrogenation keto ester ruthenium BINAP; ether asym hydrogenation keto ester ruthenium BINAP; ester asym hydrogenation keto ester ruthenium BINAP; alc asym hydrogenation keto ester ruthenium BINAP; haloalkane asym hydrogenation keto ester ruthenium BINAP; nitrile asym hydrogenation keto ester ruthenium BINAP; cyclic ether asym hydrogenation keto ester ruthenium BINAP; keto ester asym hydrogenation keto ester ruthenium BINAP, Recommanded Product: 53562-86-0.

The influence of the solvent on the asym. hydrogenation of Me acetoacetate, as a representative β-keto esters, with Ru-BINAP was studied. The catalyst used in this study was [(1R)-[1,1′-Binaphthalene]-2,2′-diylbis[diphenylphosphine-κP]]chloro[(1,2,3,4,5,6-η)-1-methyl-4-(1-methylethyl)benzene]ruthenium(1+) chloride. [(1S)-[1,1′-Binaphthalene]-2,2′-diylbis[diphenylphosphine-κP]]chloro[(1,2,3,4,5,6-η)-1-methyl-4-(1-methylethyl)benzene]ruthenium(1+) chloride was also used to give (3S)-3-Hydroxybutanoic acid Me ester from 3-oxobutanoic acid Me ester. The highest activities were measured when the reaction proceeded in methanol, ethanol or isopropanol. These solvents, which also act as proton donors, accelerate product release from the reaction intermediate. The presence of water in the reaction mixture has been found to be detrimental for both activity and enantioselectivity. All results could be explained by the existence of two different solvent dependent reaction pathways for product release.

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