Month: November 2022

Nematian, Tahereh published the artcileOne-pot conversion of sesame cake to low N-content biodiesel via nano-catalytic supercritical methanol, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Renewable Energy (2021), 964-973, database is CAplus.

The fatty acid Me esters (FAMEs) and H2 were produced from sesame cake in supercritical mixture of methanol and water using alumina supported CaO and MgO nanoparticles. The fresh and used catalysts were characterized by ICP-OES, BET, XRD, and TEM techniques. The significant influence of catalysts on the gas production was revealed. Further, the highest amounts of H2, CO, and CO₂ was achieved by MgO/ γ-Al₂O₃ with the hydrogen fraction more than 7.6 times, compared with the non-catalytic process. For biodiesel, CaO/ γ-Al₂O₃ showed the best performance where 35.3% of the liquid product was FAMEs, more than 2.3 times relative to the non-catalytic process. In order to reduce the amounts of nitrogenate content in the liquid fuel, an efficient and scalable method implemented with the Soxhlet apparatus and the absorption tube equipped with CO₂ gas flow system. Accordingly, the N-contents of the liquid products were reduced to highest degree of 65.2%, asserting that the reduced amount of the N-content strongly depends on the catalyst during the production process.

Renewable Energy 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, Name: 2,2,6,6-Tetramethylpiperidin-4-one.

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

Zeng, Zhenxing published the artcileEnergy-transfer-mediated oxygen activation in carbonyl functionalized carbon nitride nanosheets for high-efficient photocatalytic water disinfection and organic pollutants degradation, Product Details of C9H17NO, the publication is Water Research (2020), 115798, database is CAplus and MEDLINE.

Polymeric photocatalysts are promising candidates for water purification, however their catalytic performance are still unsatisfactory due to the fast charge recombination that leads to low reactive oxygen radicals production In this study, a conceptual energy-transfer-mediated photocatalytic oxygen activation system over polymeric carbon nitride without the need of electron-hole separation is proposed, exhibiting remarkable singlet oxygen triggered bacteria inactivation performance as well as organic pollutants degradation By structure and excitonic effect modulation, the oxygen activation process changes from the traditional electron-transfer mechanism to the final energy-transfer pathway, leading to the selective generation of singlet oxygen with high efficiency. The generated singlet oxygen is found to fervently attack the bacteria membrane, creating irreparable pores or holes on the cell membrane for cytoplasmic contents leaking out to accelerate bacteria destruction. The work demonstrated here offers a new photocatalytic oxygen activation pathway for achieving high-efficient reactive oxygen species generation performance without the need of charge separation

Water Research 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 C9H9ClN2, Product Details of C9H17NO.

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

Padungros, Panuwat published the artcileSynthesis and Reactivity of 4′-Deoxypentenosyl Disaccharides, Formula: C11H15NOS, the publication is Journal of Organic Chemistry (2014), 79(11), 4878-4891, database is CAplus and MEDLINE.

4-Deoxypentenosides (4-DPs) are versatile synthons for rare or higher-order pyranosides, and they provide an entry for structural diversification at the C5 position. Previous studies have shown that 4-DPs undergo stereocontrolled DMDO oxidation; subsequent epoxide ring-openings with various nucleophiles can proceed with both anti or syn selectivity. Here, we report the synthesis of α- and β-linked 4′-deoxypentenosyl (4′-DP) disaccharides, and we investigate their post-glycosylation C₅‘ additions using the DMDO oxidation/ring-opening sequence. The α-linked 4’-DP disaccharides were synthesized by coupling thiophenyl 4-DP donors with glycosyl acceptors using BSP/Tf₂O activation, whereas β-linked 4′-DP disaccharides were generated by the decarboxylative elimination of glucuronyl disaccharides under microwave conditions. Both α- and β-linked 4′-DP disaccharides could be epoxidized with high stereoselectivity using DMDO. In some cases, the α-epoxypentenosides could be successfully converted into terminal L-iduronic acids via the syn addition of 2-furyl-zinc bromide. These studies support a novel approach to oligosaccharide synthesis, in which the stereochem. configuration of the terminal 4′-DP unit is established at a post-glycosylation stage.

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, Formula: C11H15NOS.

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

Shen, Zhuo published the artcileFe-based carbonitride as Fenton-like catalyst for the elimination of organic contaminants, Formula: C9H17NO, the publication is Environmental Research (2021), 110486, database is CAplus and MEDLINE.

The Fenton-like process has been regarded as a clean and efficient approach to generate reactive oxygen species (ROS) to deal with the ever-growing environmental pollution. However, developing improved catalysts with adequate activity and stability remains a long-term goal for practical application. Herein, crystalline carbon nanotubes (CNTs) interconnected Fe/Fe₃C-doped nanoporous carbonitride (Fe-NC) was easily prepared by the pyrolysis of ZIF-8 confined with Fe³⁺. The obtained Fe-NCs possessed high degrees of graphitic carbon and nitrogen. Such Fe-NCs can enhance the activation of peroxymonosulfate (PMS) for the removal of multiple organic contaminants. The optimized Fe-NC/PMS system exhibited impressive catalytic performance, with a TOF as high as 4.43 min^-1 for 3BF degradation, and the removal efficiency of other dyes, phenols and antibiotics was up to 96.2% within 10 min. The removal efficiency of 3BF was 93.4% within 10 min with extremely low Fe ions leaching (<0.052 mg/L) even after 5 cycles. In addition, the effects of pH on the catalytic performance demonstrated that the decomposition of 3BF exceeded 95.6% even when the initial pH varied from 5 to 10. We confirmed that SO₄·^–, ·OH, O₂·^–,and ¹O₂ ere generated in the catalytic system of Fe-NC/PMS, which played a critical role in degrading the organics These findings provide new insights into the design of environmentally friendly Fenton-like catalysts with high efficiency and favorable stability in environmental remediation.

Environmental Research 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 C44H28ClFeN4, Formula: C9H17NO.

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

Hu, Bo published the artcileFive-Membered Ring Nitroxide Radical: A New Class of High-Potential, Stable Catholyte for Neutral Aqueous Organic Redox Flow Batteries, COA of Formula: C9H17NO, the publication is Advanced Functional Materials (2021), 31(35), 2102734, database is CAplus.

The utilization of redox-active and stable cyclic nitroxide radicals (CNRs) holds a great promise in neutral aqueous organic redox flow batteries (AORFBs) for large-scale energy storage. Herein, a new class of CNRs with five-membered ring pyrrolidine and pyrroline motifs for AORFBs is reported. By rational mol. engineering of introducing CC double bond into the pyrrolidine-based mol., 3-carbamoyl-2,2,5,5-tetramethylpyrroline-1-oxyl (CPL) with a high redox potential of 0.76 V (vs Ag/AgCl) is demonstrated, which is 160 mV higher than the common 2,2,6,6-tetramethylpiperidine 1-oxyl derivatives with a six-membered ring as the core structure. D. functional theory calculations reveal that the much enhanced redox potential for CPL is largely contributed by lowered standard free energy in reduction reaction and charge population sum of NO radical head. When paired with the BTMAP-viologen anolyte, the CPL-based AORFB delivers constant capacity retention of up to 99.96%/cycle over 500 cycles.

Advanced Functional Materials 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, COA of Formula: C9H17NO.

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

Chayajarus, Kampanart published the artcileEfficient synthesis of carbohydrate thionolactones, SDS of cas: 4972-31-0, the publication is Tetrahedron Letters (2006), 47(21), 3517-3520, database is CAplus.

Carbohydrate thionolactones, e.g. I, may be efficiently synthesized from the corresponding 1-thio sugars via a two-step procedure involving formation of a glycosyl phenylthiosulfinate by treatment with either phenylsulfinyl chloride or 1-(phenylsulfinyl)piperidine (BSP), and subsequent thermal elimination in toluene.

Tetrahedron Letters 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, SDS of cas: 4972-31-0.

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

Bailey, William F. published the artcileIntramolecular carbolithiation cascades as a route to a highly strained carbocyclic framework: competition between 5-exo-trig ring closure and proton transfer, Related Products of piperidines, the publication is Beilstein Journal of Organic Chemistry (2013), 537-543, database is CAplus and MEDLINE.

The preparation of fairly strained carbocyclic ring systems by intramol. 5-exo-trig ring closure has been well documented and the absence of proton transfers that would compromise such cyclizations is a hallmark of this chem. In an effort to explore the limitations of this approach to more highly strained systems, the preparation of a stellane (tricyclo[3.3.0.0^3,7]octane) framework by an intramol. carbolithiation cascade (tandem reaction) involving three coupled 5-exo-trig cyclization reactions of a vinyllithium group (I) derived from 2-bromo-4-vinyl-1,6-heptadiene by lithium-bromine exchange (substitution bromination) was investigated. The cascade does not afford 1-methylstellane. Rather, the cascade is terminated after two cyclizations by a proton transfer that occurs by an intermol. process catalyzed by trace amounts of endo-5-methyl-2-methylenebicyclo[2.2.1]heptane present in reaction mixtures as a consequence of inadvertent quenching of an intermediate alkyllithium during prolonged reaction times at room temperature The synthesis of the target compound I was achieved using 4-pentenoic acid 1,1-dimethylethyl ester as a starting material.

Beilstein Journal of Organic Chemistry 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, Related Products of piperidines.

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

Moon, Patrick J. published the artcileDecarboxylative Benzylation of Aryl and Alkenyl Boronic Esters, Recommanded Product: (3-(3-(Ethoxycarbonyl)piperidine-1-carbonyl)phenyl)boronic acid, the publication is Angewandte Chemie, International Edition (2018), 57(17), 4612-4616, database is CAplus and MEDLINE.

The copper-catalyzed decarboxylative benzylation of aryl and alkenyl boronic esters with electron-deficient aryl acetates is reported. The oxidative coupling proceeds under mild, aerobic conditions and tolerates a host of potentially reactive electrophilic functional groups that would be problematic with traditional benzylation methods (aryl iodides and bromides, protic heteroatoms, aldehydes, Michael acceptors). A reaction pathway in which a benzylic nucleophile is generated by aryl acetate decarboxylation and in turn is intercepted by the catalyst to form diarylmethane products is supported by mechanistic studies.

Angewandte Chemie, International Edition published new progress about 1218790-81-8. 1218790-81-8 belongs to piperidines, auxiliary class Piperidine,Boronic acid and ester,Benzene,Ester,Amide,Boronic Acids,Boronic Acids,Boronic acid and ester, name is (3-(3-(Ethoxycarbonyl)piperidine-1-carbonyl)phenyl)boronic acid, and the molecular formula is C15H20BNO5, Recommanded Product: (3-(3-(Ethoxycarbonyl)piperidine-1-carbonyl)phenyl)boronic acid.

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

Potowski, Marco published the artcileTranslation of the copper/bipyridine-promoted Petasis reaction to solid phase-coupled DNA for encoded library synthesis, Recommanded Product: Piperidine-4-carboxamide, the publication is Bioorganic & Medicinal Chemistry (2020), 28(9), 115441, database is CAplus and MEDLINE.

The Petasis three-component reaction gives rise to diverse substituted α-aryl glycines from readily available amines, boronic acids and glyoxalic acid. Thus, this reaction is highly attractive for DNA-encoded small mol. screening library synthesis. The Petasis reaction is for instance promoted by a potentially DNA damaging copper(I)/bipyridine reagent system in dry organic solvents. We found that solid phase-coupled DNA strands tolerated this reagent system at elevated temperature allowing for synthesis of diverse substituted DNA-tagged α-aryl glycines from DNA-conjugated secondary amines.

Bioorganic & Medicinal Chemistry published new progress about 39546-32-2. 39546-32-2 belongs to piperidines, auxiliary class Piperidine,Amine,Amide, name is Piperidine-4-carboxamide, and the molecular formula is C6H12N2O, Recommanded Product: Piperidine-4-carboxamide.

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

Babaev, E. V. published the artcileBasic techniques of working on a solid phase: From ABC of the peptide synthesis to libraries of non-natural amino acids, COA of Formula: C19H21N, the publication is Russian Journal of General Chemistry (2010), 80(12), 2572-2589, database is CAplus.

Libraries of hardly available amino acids bearing a heteroaromatic ring (2-pyrimidyl, substituted 2-pyridyl or 2-thiazolyl) at the amino group were prepared using solid-phase synthesis on various resins. The synthesized compounds are structurally similar to some known antidiabetic drugs. The paper combines features of a review (elementary introduction to the solid-phase synthesis methodol. and technique for beginners and selected methods from peptide chem.) and step-by-step exptl. protocols (tested by the authors) useful as a methodic tool. The presented protocols (immobilization and modification of amino acids, placing and removal of common protective groups) require no sophisticated equipment and may be useful as pictorial introductory tasks for students education.

Russian Journal of General Chemistry 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 C19H21N, COA of Formula: C19H21N.

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