Category: piperidines

Litjens, Remy published the artcileSynthesis of an α-Gal epitope α-D-Galp-(1â†?)-β-D-Galp-(1â†?)-β-D-Glcp NAc-lipid conjugate, Category: piperidines, the publication is Journal of Carbohydrate Chemistry (2005), 24(7), 755-769, database is CAplus.

The synthesis of a neoglycoconjugate containing the Galili epitope trisaccharide connected to a spacer-lipid entity is described. The α-D-Galp-(1â†?)-β-D-Galp-(1â†?)-β-D-GlcpNAc trisaccharide, equipped with a 3-aminopropyl spacer, is efficiently assembled from easily accessible building blocks in a one-pot procedure. Global deprotection of the trisaccharide and ensuing introduction of a bis(palmitamido)-propanamido moiety afforded title trisaccharide.

Journal of Carbohydrate Chemistry published new progress about 4972-31-0. 4972-31-0 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-(Phenylsulfinyl)piperidine, and the molecular formula is C11H15NOS, Category: piperidines.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Ruess, Raffael published the artcileEfficient Electron Collection by Electrodeposited ZnO in Dye-Sensitized Solar Cells with TEMPO⁺/⁰ as the Redox Mediator, Recommanded Product: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, the publication is Journal of Physical Chemistry C (2019), 123(36), 22074-22082, database is CAplus.

The power conversion efficiency in established dye-sensitized solar cells (DSSCs) suffers from high overpotentials needed because of slow electron transfer kinetics. If redox couples are used that have a low reorganization energy, fast dye regeneration can be achieved, but fast recombination reactions can barely be suppressed. If they become competitive to electron transport to the back electrode, solar cell efficiencies drastically drop. In this work, it is shown that electron transport is facilitated by substituting the commonly used photoanode material, nanoparticulate TiO₂, by electrodeposited ZnO, which, albeit more complex surface reactions, provides electron transport by orders of magnitude faster than nanoparticulate TiO₂. With TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) as the redox mediator, the dye is efficiently regenerated with overpotentials well below 0.2 V. We demonstrate that the external quantum efficiency with TiO₂-based photoanodes is significantly limited by recombination, while it is maintained at high values for electrodeposited ZnO. It is thereby shown that redox couples with fast kinetics can be employed in DSSCs without drawbacks in quantum efficiency if sufficient fast electron transport in the porous semiconductor network is provided.

Journal of Physical Chemistry C published new progress about 219543-09-6. 219543-09-6 belongs to piperidines, auxiliary class Piperidine,Fluoride,Salt,Amine,Amide, name is 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, and the molecular formula is C11H21BF4N2O2, Recommanded Product: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Liao, Hsin-Yu published the artcileDifferential Receptor Binding Affinities of Influenza Hemagglutinins on Glycan Arrays, Formula: C11H15NOS, the publication is Journal of the American Chemical Society (2010), 132(42), 14849-14856, database is CAplus and MEDLINE.

A library of 27 sialosides, including seventeen 2,3-linked and ten 2,6-linked glycans, has been prepared to construct a glycan array and used to profile the binding specificity of different influenza hemagglutinins (HA) subtypes, especially from the 2009 swine-originated H1N1 and seasonal influenza viruses. It was found that the HAs from the 2009 H1N1 and the seasonal Brisbane strain share similar binding profiles yet different binding affinities toward various α2,6 sialosides. Anal. of the binding profiles of different HA subtypes indicate that a min. set of 5 oligosaccharides can be used to differentiate influenza H1, H3, H5, H7, and H9 subtypes. In addition, the glycan array was used to profile the binding pattern of different influenza viruses. It was found that most binding patterns of viruses and HA proteins are similar and that glycosylation at Asn27 is essential for receptor binding.

Journal of the American Chemical Society published new progress about 4972-31-0. 4972-31-0 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-(Phenylsulfinyl)piperidine, and the molecular formula is C11H15NOS, Formula: C11H15NOS.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Crich, David published the artcileDoes Neighboring Group Participation by Non-Vicinal Esters Play a Role in Glycosylation Reactions? Effective Probes for the Detection of Bridging Intermediates, Recommanded Product: 1-(Phenylsulfinyl)piperidine, the publication is Journal of Organic Chemistry (2008), 73(22), 8942-8953, database is CAplus and MEDLINE.

Neighboring group participation in glycopyranosylation reactions is probed for esters at the 3-O-axial and -equatorial, 4-O-axial and -equatorial, and 6-O-sites of a range of donors through the use tert-butoxycarbonyl esters. The anticipated intermediate cyclic dioxanyl cation is interrupted for the axial 3-O-derivative, leading to the formation of a 1,3-O-cyclic carbonate ester, with loss of a tert-Bu cation, providing convincing evidence of participation by esters at that position. However, no evidence was found for such a fragmentation of carbonate esters at the 3-O-equatorial, 4-O-axial and -equatorial, and 6-O positions, indicating that neighboring group participation from those sites does not occur under typical glycosylation conditions. Further probes employing a 4-O-(2-carboxy)benzoate ester and a 4-O-(4-methoxybenzoate) ester, the latter in conjunction with an ¹⁸O quench designed to detect bridging intermediates, also failed to provide evidence for participation by 4-O-esters in galactopyranosylation.

Journal of Organic Chemistry published new progress about 4972-31-0. 4972-31-0 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-(Phenylsulfinyl)piperidine, and the molecular formula is C11H15NOS, Recommanded Product: 1-(Phenylsulfinyl)piperidine.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Liang, Dongmin published the artcileHighly efficient catalytic ozonation for ammonium in water upon γ-Al₂O₃@Fe/Mg with acidic-basic sites and oxygen vacancies, Product Details of C9H17NO, the publication is Science of the Total Environment (2022), 155278, database is CAplus and MEDLINE.

Catalytic ozonation has prospects in the advanced treatment of nitrogen removal, and solid base MgO can efficiently catalyze the ozonation of ammonium nitrogen. However, it is necessary to improve the problem of easy loss, difficult recovery, and low percentage of gaseous products. Here, MgO, amorphous Fe₂O₃,and γ-Al₂O₃ were selected as dopingcomponents and supports, resp., to prepare γ-Al₂O₃@Fe/Mg composite catalysts with abundant acidic-basicsites and oxygen vacancies. The results show that γ-Al₂O₃@Fe/Mg₅ can efficiently catalyze the ozonation of ammonium nitrogen (98.73%) with 67.82% gaseous product selectivity under the conditions of initial pH = 7, catalyst dosage of 112.88 g/L, and ozone dosage of 2.4 mg/min. The doping of Fe₂O₃ and MgO with a weaker lattice oxygen binding energy improves the gaseous product selectivity. The mechanism of ammonium nitrogen removal for γ-Al₂O₃@Fe/Mg₅ is revealed, especially the intrinsic contribution of acidic-basic sites and oxygen vacancies. The pH and active sites play different roles in ozone decomposition for NH₄⁺ removal. Surface hydroxyl protonation on basic sites and oxygen vacancies and electron transfer on acidic sites are responsible for ozone decomposition to hydroxyl radicals. Moreover, γ-Al₂O₃@Fe/Mg₅ exhibits good stability, few leaching ions, and can be settled in waterfor easy recovery. This study suggests that γ-Al₂O₃@Fe/Mg₅ is a good candidate for the catalytic ozonation of ammonium nitrogen.

Science of the Total Environment published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Product Details of C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Ke, Ming-Kun published the artcileInterface-Promoted Direct Oxidation of p-Arsanilic Acid and Removal of Total Arsenic by the Coupling of Peroxymonosulfate and Mn-Fe-Mixed Oxide, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Environmental Science & Technology (2021), 55(10), 7063-7071, database is CAplus and MEDLINE.

As one of the extensively used feed additives in livestock and poultry breeding, p-arsanilic acid (p-ASA) has become an organoarsenic pollutant with great concern. For the efficient removal of p-ASA from water, the combination of chem. oxidation and adsorption is recognized as a promising process. Herein, hollow/porous Mn-Fe-mixed oxide (MnFeO) nanocubes were synthesized and used in coupling with peroxymonosulfate (PMS) to oxidize p-ASA and remove the total arsenic (As). Under acidic conditions, both p-ASA and total As could be completely removed in the PMS/MnFeO process and the overall performance was substantially better than that of the Mn/Fe monometallic system. More importantly, an interface-promoted direct oxidation mechanism was found in the p-ASA-involved PMS/MnFeO system. Rather than activate PMS to generate reactive oxygen species (i.e., SO₄^·-, ·OH, and ¹O₂), the MnFeO nanocubes first adsorbed p-ASA to form a ligand-oxide interface, which improved the oxidation of the adsorbed p-ASA by PMS and ultimately enhanced the removal of the total As. Such a direct oxidation process achieved selective oxidation of p-ASA and avoidance of severe interference from the commonly present constituents in real water samples. After facile elution with dilute alkali solution, the used MnFeO nanocubes exhibited superior recyclability in the repeated p-ASA removal experiments Therefore, this work provides a promising approach for efficient abatement of phenylarsenical-caused water pollution based on the PMS/MnFeO oxidation process.

Environmental Science & Technology published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Wang, Gen published the artcileActivation of peroxydisulfate by defect-rich CuO nanoparticles supported on layered MgO for organic pollutants degradation: An electron transfer mechanism, Quality Control of 826-36-8, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 431(Part_1), 134026, database is CAplus.

Heterogeneous activation of peroxydisulfate (PDS) by transition metal oxides offers a promising strategy for organic pollutants removal but suffers from low electron transfer efficiency. Herein, layered MgO supported CuO nanoparticles was prepared by thermal conversion of metal-phenolic networks of Cu²⁺/Mg²⁺ and tannic acid. CuO nanoparticles (â‰? nm) were spatial monodispersed on layered MgO, inducing the formation of electron deficient Cu³⁺ and surface oxygen vacancies and thus facilitated adsorption and activation of PDS. The electron-rich CuO/MgO hybrid catalysts manifested good catalytic performance of PDS activation for organic pollutants removal. At 0.18 g/L of CuO/MgO hybrid catalyst and 0.2 mM of PDS, complete removal of bisphenol A (BPA) was achieved with a high kinetic constant (0.1 min^-1, 50 min). Quenching experiments, ESR tests, PDS decomposition behaviors, electrochem. anal. and in situ ATR-FTIR and Raman spectroscopy revealed a nonradical pathway of electron transfer for PDS activation. The CuO/MgO hybrid catalysts exhibited wide working pH range from 3 to 11, selective oxidation capability, good resistance to halide ion and high utilization efficiency of PDS, and thus would be a promising candidate for wastewater remediation.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C5H5ClIN, Quality Control of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Haake, M. published the artcileDialkylaminosuccinimidosulfonium compounds. 3. A simple method for the oxidation of sulfenamides to sulfinamides, Safety of 1-(Phenylsulfinyl)piperidine, the publication is Synthesis (1979), 97, database is CAplus.

R¹SNR₂ were oxidized by treatment with N-chlorosuccinimide in CH₂Cl₂ to give a succinimidosulfonium chloride intermediate which was hydrolyzed in situ by aqueous KHCO₃ to give 41-85% R¹SONR₂ [R₂ = Me₂, (CH₂)₅, or (CH₂)₂O(CH₂)₂; R¹ = Et or Ph].

Synthesis published new progress about 4972-31-0. 4972-31-0 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-(Phenylsulfinyl)piperidine, and the molecular formula is C11H15NOS, Safety of 1-(Phenylsulfinyl)piperidine.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Ullrich, Thomas published the artcileSynthesis and immobilization of erythro-C14-ω-aminosphingosine-1-phosphate as a potential tool for affinity chromatography, Recommanded Product: 1-((9H-Fluoren-9-yl)methyl)piperidine, the publication is ChemMedChem (2008), 3(2), 356-360, database is CAplus and MEDLINE.

A sphingosine-1-phosphate (S1P) analog containing a terminal alkyl chain amino group is synthesized in a few steps via olefin cross-metathesis of an optically resolved intermediate and subsequent phosphorylation. Regioselective acylation of this intermediate at its N terminus in solution is demonstrated as a model reaction and provides a biol. active derivative Finally, the ω-amino intermediate is immobilized on an affinity matrix. The choice of a UV-active phosphate protecting group allows for quantification of resin loading after cleavage which amounted to 66%.

ChemMedChem published new progress about 35661-58-6. 35661-58-6 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-((9H-Fluoren-9-yl)methyl)piperidine, and the molecular formula is C13H22BN3O4, Recommanded Product: 1-((9H-Fluoren-9-yl)methyl)piperidine.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Mukherjee, Mana Mohan published the artcileSynthetic Routes toward Acidic Pentasaccharide Related to the O-Antigen of E. coli 120 Using One-Pot Sequential Glycosylation Reactions, Recommanded Product: 1-(Phenylsulfinyl)piperidine, the publication is Journal of Organic Chemistry (2017), 82(11), 5751-5760, database is CAplus and MEDLINE.

Concise syntheses of the acidic pentasaccharide, related to the O-antigenic polysaccharide of Escherichia coli 120, as its p-methoxyphenyl glycoside, have been achieved using a one-pot sequential glycosylation technique. The glycosylation have been accomplished either by the activation of the thioglycosides using NIS in the presence of FeCl₃ or by a pre-activation by Ph₂SO, TTBP, Tf₂O, and the activation of the trichloroacetimidates using FeCl₃ alone or TMSOTf. Most of the intermediate steps are high yielding, and the stereo outcomes of the glycosylation steps were excellent. The syntheses of the targeted pentasaccharide have been performed with both three- and four-component, one-pot sequential glycosylation reactions, and in both cases, the orthogonal glycosylation is carried out utilizing catalytic activity of FeCl₃. A late-stage TEMPO-mediated regioselective oxidation has been performed to achieve the required uronic acid motif.

Journal of Organic Chemistry published new progress about 4972-31-0. 4972-31-0 belongs to piperidines, auxiliary class Piperidine,Benzene, name is 1-(Phenylsulfinyl)piperidine, and the molecular formula is C11H15NOS, Recommanded Product: 1-(Phenylsulfinyl)piperidine.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem