Month: April 2022

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: 118430-78-7, is researched, Molecular C8H9N3S, about N,N-Dialkyl-N’-Chlorosulfonyl Chloroformamidines in Heterocyclic Synthesis. Part XII.* Synthesis and Reactivity of the Pyrazolo[3,4-e][1,2,4]thiadiazine Ring System, the main research direction is pyrimidothiadiazine preparation; pyrazolothiadiazine preparation; dialkylchlorosulfonyl chloroformamidine aminopyrazole dinucleophilic substitution methylation alkylation.Related Products of 118430-78-7.

N,N-Dialkyl-N’-chlorosulfonyl chloroformamidines 1 reacted regioselectively with 1-substituted 5-aminopyrazoles 2 via a 1,3-CCN dinucleophilic substitution to afford pyrazolo[3,4-e][1,2,4]thiadiazines 3 e. g., I, as the sole isolated products. Compounds 3, representatives of a very rare ring system, were shown to possess three nucleophilic sites at N2, N4, and N6. Methylation occurred at all three sites. Alkylation with benzylic halides occurred preferentially at N2, but some also occurred at N4, and at C7a. Alkylation with Et bromoacetate occurred at both N4 and N6, but the latter derivatives underwent a pyrazole ring expansion to afford pyrimido[4,5-e][1,2,4]thiadiazine derivs, e. g., II. Compounds 3 were unreactive towards various acylating agents.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Synthetic Route of C17H19N3O2S. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Whole-cell oxidation of omeprazole sulfide to enantiopure esomeprazole with Lysinibacillus sp. B71. Author is Babiak, Peter; Kyslikova, Eva; Stepanek, Vaclav; Valesova, Renata; Palyzova, Andrea; Maresova, Helena; Hajicek, Josef; Kyslik, Pavel.

Production of enantiopure esomeprazole by biocatalysis is of great demand by pharmaceutical industry. A Gram-pos. bacterium oxidizing omeprazole sulfide (5-methoxy-2-[((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio]-1H-benzoimidazole) to (S)-sulfoxide esomeprazole (S)-5-methoxy-2-[(4-methoxy-3,5-dimethylpyridin-2-yl) methylsulfinyl]-3H-benzoimidazole was isolated from soil polluted with elemental sulfur. The strain exhibited the highest identity with the genus Lysinibacillus and catalyzed oxidation of 1a into enantiopure esomeprazole with conversion of 77% in a stirred bioreactor, fed-batch culture. No consecutive oxidation of (S)-sulfoxide to sulfone was observed during whole-cell catalysis. The unique characteristics of the catalyst provide a solid basis for further improvement and development of sustainable green bioprocess.

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Ether – Wikipedia,
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Category: ethers-buliding-blocks. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Thermodynamic study of the electrochemical oxidation of some aminophenol derivatives: Experimental and theoretical investigation. Author is Beiginejad, Hadi; Amani, Ameneh; Nematollahi, Davood; Khazalpour, Sadegh.

Electrochem. oxidation of some aminophenol derivatives (1-5) was studied both exptl. and theor. Exptl. results were obtained using cyclic voltammetry and controlled potential coulometry. The theor. results were calculated at DFT (B3LYP and BP86) levels of theory and 6-311 + G (p,d) basis sets. Using a general thermodn. cycle, the calculated ΔGtot of the oxidation of the studied aminophenol derivatives indicates that thermodn. is one of the important parameters on the potential oxidation Electrochem. oxidation potential of 1-5 is directly dependent on the ΔGtot of electrochem. oxidation In addition mechanisms of the electrochem. oxidation of 4-(piperazin-1-yl) phenol (6) in the presence of various nucleophiles was studied in viewpoint of the thermodn. Mechanistic study of the electrochem. oxidation of 6 in the presence of different nucleophiles indicates that although the electrochem. oxidations of 6H+ in the presence of different nucleophiles have different mechanisms but proceed in the thermodynamically favored directions.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Name: 4-(Piperazin-1-yl)phenol. 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: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Synthesis and antioxidant activity of some 1-aryl/aralkyl piperazine derivatives with xanthine moiety at N4.

Six new aryl/aralkyl substituted piperazine derivatives, containing methylxanthine moiety I (R = Bn, 4-FC6H4, 4-HOC6H4, etc.) were synthesized. All compounds were in vitro screened for their activity as antioxidants using DPPH (2,2′-Diphenyl-1-picrylhydrazyl), ABTS (2,2′-azinobis-(3-ethylbenzothiazine-6-sulfonic acid)) and FRAP (ferric reducing/antioxidant power) methods. The antioxidant activity of the studied compounds against lipid peroxidation was also measured. The highest antioxidant activity was demonstrated by compound I (R = 4-HOC6H4). It is obvious that the presence of a hydroxyl group in the structure is essential for the antioxidant properties and should be taken into consideration in further design of structures with potential antioxidant properties.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-(Piperazin-1-yl)phenol( cas:56621-48-8 ) is researched.Application of 56621-48-8.Kashif Amir, Muhammad; Hogarth, Graeme; Khan, Zaibunisa; Imran, Muhammad; Zia-ur-Rehman published the article 《Platinum(II) dithiocarbamate complexes [Pt(S2CNR2)Cl(PAr3)] as anticancer and DNA-damaging agents》 about this compound( cas:56621-48-8 ) in Inorganica Chimica Acta. Keywords: platinum dithiocarbamate complex preparation anticancer DNA binding; optimized mol structure platinum dithiocarbamate complex. Let’s learn more about this compound (cas:56621-48-8).

Following the fortunate discovery of cisplatin as an anticancer drug the search for new effective Pt-containing analogs with high potency but reduced side effects and resistance is of great importance. Herein, we report four new monofunctional platinum(II) dithiocarbamate complexes, [Pt(S2CNR2)Cl(PAr3)], and their activity against selected cancer cell lines. DFT-optimized structures reveal steric hindrance, similar to phenanthriplatin, from an axial C-H site of the triarylphosphine. High activity against selected cancer cell lines, MCF-7 > LU > Hepa-IcIc7, can be attributed to the axial protection offered by the aromatic C-H moiety, together with the lipophilicity and formation of bulkier and more hydrophobic DNA adducts. DNA binding, denaturing and plasmid cleavage studies demonstrate their potential to cleave DNA via electrostatic or covalent interactions. DFT and exptl. studies show the ability to replace chloride with different nucleophiles; substitution with smaller nucleophiles being fast while with larger nucleophiles is slow.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Staack, R. F.; Theobald, D. S.; Paul, L. D.; Springer, D.; Kraemer, T.; Maurer, H. H. published the article 《In vivo metabolism of the new designer drug 1-(4-methoxyphenyl)piperazine (MeOPP) in rat and identification of the human cytochrome P450 enzymes responsible for the major metabolic step》. Keywords: methoxyphenylpiperazine metabolism cytochrome P450 2D6.They researched the compound: 4-(Piperazin-1-yl)phenol( cas:56621-48-8 ).Recommanded Product: 56621-48-8. 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:56621-48-8) here.

The in vivo metabolism of 1-(4-methoxyphenyl)piperazine (MeOPP), a novel designer drug, was studied in male Wistar rats. MeOPP was mainly O-demethylated to 1-(4-hydroxyphenyl)piperazine (4-HO-PP) in addition to degradation of the piperazine moiety. O-demethylation, the major metabolic step, was studied with cDNA-expressed human hepatic cytochrome P 450 (CYP) enzymes in pooled human liver microsomes (pHLM) and in single donor human liver microsomes with CYP2D6 poor metabolizer genotype (PM HLM). CYP2D6 catalyzed O-demethylation with apparent Km and Vmax values of 48.34 μM and 5.44 pmol min-1 pmol-1 CYP, resp. pHLM catalyzed the monitored reaction with an apparent Km = 204.80 μM and Vmax = 127.50 pmol min-1 mg-1 protein. The CYP2D6-specific chem. inhibitor quinidine (1 and 3 μM) significantly inhibited 4-HO-PP formation by 71.9% and by 98.5%, resp., in incubation mixtures with pHLM and 200 μM MeOPP. O-demethylation was significantly lower in PM HLM compared with pHLM (70.6%). These data suggest that polymorphically expressed CYP2D6 is the enzyme mainly responsible for MeOPP O-demethylation.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

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 13C Satellite-Free 1H NMR Spectra, published in 2017-11-21, which mentions a compound: 73590-85-9, Name is 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, Molecular C17H19N3O2S, SDS of cas: 73590-85-9.

A new NMR experiment (Destruction of Interfering Satellites by Perfect Echo Low-pass filtration, DISPEL) is introduced that facilitates the anal. of low-level components in high dynamic range mixtures by suppressing one-bond 13C satellite signals in 1H spectra. Since the natural abundance of 13C is around 1.1%, these satellites appear at 0.54% of the intensity of a parent peak, mimicking and often masking impurity signals. The new experiment suppresses one-bond 13C satellite signals, with high efficiency, at negligible cost in signal-to-noise ratio, and over a wide range of one-bond coupling constants, without the need for broadband 13C decoupling.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-(Piperazin-1-yl)phenol( cas:56621-48-8 ) is researched.Reference of 4-(Piperazin-1-yl)phenol.Ryu, Eun Kyoung; Choe, Yearn Seong; Kim, Dong Hyun; Ko, Bong-Ho; Choi, Yong; Lee, Kyung-Han; Kim, Byung-Tae published the article 《In vitro metabolism studies of 18F-labeled 1-phenylpiperazine using mouse liver S9 fraction》 about this compound( cas:56621-48-8 ) in Nuclear Medicine and Biology. Keywords: radiolabeled fluorine 18 phenylpiperazine metabolism liver S9 fraction. Let’s learn more about this compound (cas:56621-48-8).

The in vitro metabolism of 1-(4-[18F]fluoromethylbenzyl)-4-phenylpiperazine ([18F]1) and 1-(4-[18F]fluorobenzyl)-4-phenylpiperazine ([18F]2) was investigated using mouse liver S9 fraction. Results were compared to those of in vivo metabolism using mouse blood and bone and to in vitro metabolism using mouse liver microsomes. Defluorination was the main metabolic pathway for [18F]1 in vitro and in vivo. Based on TLC, HPLC and LC-MS data, [18F]fluoride ion and less polar radioactive metabolites derived from aromatic ring oxidation were detected in vitro, and the latter metabolites were rapidly converted into the former with time, whereas only the [18F]fluoride ion was detected in vivo. Similarly, the in vitro metabolism of [18F]2 using either S9 fraction or microsomes showed the same pattern as the in vivo method using blood; however, the radioactive metabolites derived from aromatic ring oxidation were not detected in vivo. These results demonstrate that liver S9 fraction can be widely used to investigate the intermediate radioactive metabolites and to predict the in vivo metabolism of radiotracers.

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Safety of 4-(Piperazin-1-yl)phenol. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 4-(Piperazin-1-yl)phenol, is researched, Molecular C10H14N2O, CAS is 56621-48-8, about Searching for multi-target antipsychotics: Discovery of orally active heterocyclic N-phenylpiperazine ligands of D2-like and 5-HT1A receptors. Author is Neves, Gilda; Menegatti, Ricardo; Antonio, Camila B.; Grazziottin, Luiza R.; Vieira, Renan O.; Rates, Stela M. K.; Noel, Francois; Barreiro, Eliezer J.; Fraga, Carlos A. M..

The authors described herein the design, synthesis, and pharmacol. evaluation of N-phenylpiperazine heterocyclic derivatives as multi-target compounds potentially useful for the treatment of schizophrenia. The isosteric replacement of the heterocyclic ring at the biaryl motif generating pyrazole, 1,2,3-triazole, and 2-methylimidazole[1,2-a]pyridine derivatives resulted in 21 analogs with different substitutions at the para-biaryl and para-phenylpiperazine positions. Among the compounds prepared, 4 (LASSBio-579) and 10 (LASSBio-664) exhibited an adequate binding profile and a potential for schizophrenia pos. symptoms treatment without cataleptogenic effects. Structural features of this mol. scaffold are discussed regarding binding affinity and selectivity for D2-like, 5-HT1A, and 5-HT2A receptors.

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Computed Properties of C17H19N3O2S. 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: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Catalytic asymmetric oxidation of 1H-benzimidazolyl pyridinylmethyl sulfides with cumene hydroperoxide catalyzed by a titanium complex with (S,S)-N,N’-dibenzyl tartramide ligand.

A chiral titanium complex, formed in situ from Ti(Oi-Pr)4, (S,S)-N,N’-dibenzyl tartramide, and water was found to serve as an efficient catalyst for the asym. oxidations of 1H-benzimidazolyl pyridinylmethyl sulfides with cumene hydroperoxide (CHP) in the absence of a base. Several proton pump inhibitors (PPIs), such as esomeprazole, lansoprazole, rabeprazole, and pantoprazole were obtained in high yield (up to 92%) and excellent enantiomeric excess (up to 96%).

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Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem