Month: December 2022

Correale, Jorge published the artcileBruton’s tyrosine kinase inhibitors as potential therapies for multiple sclerosis, Computed Properties of 1971920-73-6, the publication is Lancet Neurology (2021), 20(9), 689-691, database is CAplus and MEDLINE.

A review. Over the past 30 years increasing numbers of mols. have been developed for treatment of multiple sclerosis. Bruton’s tyrosine kinase is a cytoplasmic tyrosine kinase expressed by B cells and myeloid cells. Both B cells and myeloid cells (particularly microglia) are important drivers of multiple sclerosis, suggesting that inhibitors of Bruton’s tyrosine kinase, such as the irreversible inhibitors evobrutinib, tolebrutininb, and orelabrutinib, and the reversible inhibitors fenebrutinib and BIIB091, might provide therapeutic benefits for patients. Bruton’s tyrosine kinase inhibitors could provide attractive therapeutic benefits for patients with multiple sclerosis, with potential advantages over monoclonal antibodies because they might be less likely to trigger antibody responses, allergic reactions,or neutralisation of their therapeutic actions. Addnl., these inhibitors, as small mols., might be able to access the CNS and inhibit microglial activation. However, whether Bruton’s tyrosine kinase inhibitors will be more efficacious than monoclonal antibodies remains to be established.

Lancet Neurology published new progress about 1971920-73-6. 1971920-73-6 belongs to piperidines, auxiliary class Other Aliphatic Heterocyclic,Piperidine,Alkenyl,Amine,Benzene,Ether,Inhibitor,Inhibitor, name is (R)-1-(1-Acryloylpiperidin-3-yl)-4-amino-3-(4-phenoxyphenyl)-1H-imidazo[4,5-c]pyridin-2(3H)-one, and the molecular formula is C26H25N5O3, Computed Properties of 1971920-73-6.

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

Campbell, A. F. published the artcileThe separation of m-and p-cresols from coal-tar crude carbolic acid, Safety of 1-(Phenylsulfinyl)piperidine, the publication is Journal of Industrial and Engineering Chemistry (Washington, D. C.) (1922), 732-7, database is CAplus.

The fractions obtained by the distillation of the crude product consist principally of (1) PHOH, (2) o-cresol, (3) m- and p-cresols and (4) xylenols and other complex phenols. Fractionation of (3) gives a PhOH-free product containing 59-60% m-cresol. The sulfonation of this with 96%, H₂SO₄ at 40 for 6 hrs., and subsequent treatment with H₂O gives an extract (A) of non-sulfonated cresols and an aqueous solution (B) of monosulfonates containing 78-80% of the m-compound B is converted into the NH₄ salts through the Ba salts and on fractional crystallization yields a product containing 98-100% m-cresol. The further sulfonation of A with 96% H₂SO₄ gives a non-sulfonated product (C) containing about 80% p-cresol and a sulfonated product (D) containing about 58% m-cresol, which is further sulfonated for obtaining the m-compound C may be treated so that a product containing 89% p-cresol is obtained.

Journal of Industrial and Engineering Chemistry (Washington, D. C.) 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

Bobbitt, James M. published the artcileOxoammonium Salts. 6. 4-Acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium perchlorate: A stable and convenient reagent for the oxidation of alcohols. Silica gel catalysis, Computed Properties of 219543-09-6, the publication is Journal of Organic Chemistry (1998), 63(25), 9367-9374, database is CAplus.

The title piperidine-1-oxoammonium perchlorate I is a stable, nonhygroscopic oxoammonium salt that is easily prepared and can be used for the oxidation of alcs. to ketones or aldehydes in near quant. yields. The reaction is colorimetric, does not require anhydrous conditions, does not involve heavy metals, and can be carried out conveniently. Furthermore, the oxidant can be easily regenerated. The oxidation is somewhat specific in that the relative reactivities of an allyl alc. (geraniol), benzaldehyde, and 1-decanol are about 1001:0.1. The reaction is catalyzed by silica gel.

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, Computed Properties of 219543-09-6.

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

Akiyama, Yoshikatsu published the artcileSynthesis of Temperature-Responsive Polymers Containing Piperidine Carboxamide and N,N-diethylcarbamoly Piperidine Moiety via RAFT Polymerization, Product Details of C6H12N2O, the publication is Macromolecular Rapid Communications (2021), 42(15), 2100208, database is CAplus and MEDLINE.

In this study, poly(N-acryloylnipecotamide) (PNANAm), poly(N-acryloylisonipecotamide) (PNAiNAm), and poly(N-acryloyl-N,N-diethylnipecotamide) (PNADNAm) are synthesized as temperature-responsive polymers using reversible addition-fragmentation chain-transfer polymerization Aqueous solutions of the three polymers are examined via temperature-dependent optical transmittance measurements. The PNANAm sample with a hydrophilic terminal group shows an upper critical solution temperature (UCST) in phosphate-buffered saline (PBS) when its mol. weight (M_n) is �7600, whereas PNANAm (M_n < 7600) is soluble The UCST is influenced by mol. weight and polymer concentration In contrast, PNANAm sample with nonionic terminal group shows UCST, when M_n is < 7600, suggesting that the terminal nonionic group possibly increases UCST of PNANAm. The urea addition experiment suggests that the driving force for expression of UCST of PNANAm is the formation of inter- and intramol. hydrogen bonds among the polymer chains. PNAiNAm is soluble in PBS but exhibits an UCST in an appropriate concentration of ammonium sulfate. In contrast, PNADNAm exhibits a lower critical solution temperature Comparing the chem. structure of these polymers and their phase transition behaviors suggests that the carboxamide group position in the piperidine ring could determine the UCST expression. The results could help design temperature-responsive polymers with a desired cloud point temperature

Macromolecular Rapid Communications 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, Product Details of C6H12N2O.

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

Abood, L. G. published the artcilePossible role of brain mitochondria in psychopharmacology, Application In Synthesis of 13444-24-1, the publication is Journal of Neuropsychiatry (1959), 92-5, database is CAplus.

cf. CA 53, 22487b. Experiments were performed on rat-brain mitochondria to determine the presence of cholinergic receptor sites. It was observed that the distribution of tritiated N-ethyl-3-piperidyl benzilate (JB-318) (I) was similar to that of acetylcholine in the cellular fractions of rat brain. The largest concentration was found in the mitochondria. It was concluded that the cholinergic receptor sites were in this fraction or granules associated with this fraction. The inhibition of a number of drugs upon the binding of I to mitochondria was chlorpromazine 80, 3-piperidyl benzilate (JB-305) and N,N’-piperazinodiethyl dibenzilate 50, hydroxyzine 44, and dinitrophenol 20%. It was suggested that if the receptor sites are confined to cytoplasmic particles, then the phenothiazine types of tranquilizers and the psycho-mimetic agents act at the mitochondrial level of the cell.

Journal of Neuropsychiatry published new progress about 13444-24-1. 13444-24-1 belongs to piperidines, auxiliary class Piperidine,Alcohol, name is 1-Ethylpiperidin-3-ol, and the molecular formula is C7H15NO, Application In Synthesis of 13444-24-1.

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

Fuson, Reynold C. published the artcileRing enlargement by rearrangement of the 1,2-aminochloroalkyl group; rearrangement of 1-ethyl-2-(chloromethyl)pyrrolidine to 1-ethyl-3-chloropiperidine, HPLC of Formula: 13444-24-1, the publication is Journal of the American Chemical Society (1948), 2760-2, database is CAplus.

Reduction of 1,2-dicarbethoxypyrrole over Raney Ni in dry MeOH at 70°/1500 lb. gives 95% 1,2-dicarbethoxypyrrolidine; further reduction over Cu chromite in EtOH at 250°/100 atm. gives 31% 1-ethyl-2-hydroxypyrrolidine (I); the HCl salt and benzoate-HCl are oils; benzoate picrate, m. 170.5-1.5°. Diethyl(tetrahydrofurfuryl)amine yields 43% 1-ethyl-3-hydroxypiperidine, which forms a HCl salt (II), m. 157-8°, and a benzoate picrate, yellow, m. 181.5-2.5°. I (4 g.) in 25 ml. CHCl₃ at 0°, treated with HCl to form the HCl salt and then with 4.8 g. SOCl₂ in CHCl₃, and the mixture stirred 30 min. at room temperature and refluxed 1 hr., gives 56% 1-ethyl-2-(chloromethyl)pyrrolidine-HCl (III), m. 165-70° (heated 20°/min.), solidifies, and m. 153.5-4°; slowly heated, III contracts at 165° and m. 193.5-4°; picrate, m. 128.5-9.5°. The Me₂CO used to wash the crude III yields 1.4 g. 1-methyl-2-(chloromethyl)pyrrolidine picrate (?) (IV), m. 163.5-4.5°; it is possible that I contained some 1-ethyl-2-(hydroxymethyl)pyrrolidine. II (5 g.) and 3.7 g. SOCl₂ in 50 ml. PhMe, refluxed 3 hrs., give 87% 1-ethyl-3-chloropiperidine (V) as the HCl salt (VI), m. 193.5-4°; a mixture of III and VI also m. 193.5-4°. The base from III appears to undergo rearrangement to V as rapidly as it is liberated, an ethylenimonium ion probably being an intermediate. The base (V) from VI does not undergo rearrangement on liberation. The attempt to prepare 1-methyl-3-chloropiperidine from IV was inconclusive.

Journal of the American Chemical Society published new progress about 13444-24-1. 13444-24-1 belongs to piperidines, auxiliary class Piperidine,Alcohol, name is 1-Ethylpiperidin-3-ol, and the molecular formula is C7H15NO, HPLC of Formula: 13444-24-1.

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

Schultz, Otto E. published the artcileMechanism of local anesthetic action. 1. Receptor problem, SDS of cas: 13444-24-1, the publication is Pharmazie (1970), 25(8), 472-80, database is CAplus and MEDLINE.

Furfuryl alc. was treated 1 hr at -5° with PBr3 and the product treated with MeNH2 and alc. NaI 72 hr at 100-20° to give I. Treatment of I with HBr-HOAc gave a ring-opened product which was cyclized with KOH to give 63% II. Similarly prepared were 10 other compounds including III, IV, V, VI, and VII. The local anesthetic activity of these compounds vs. procaine-HCl (III) was determined III had 80% of the VIII activity. The mechanism of local anesthetic activity is discussed.

Pharmazie published new progress about 13444-24-1. 13444-24-1 belongs to piperidines, auxiliary class Piperidine,Alcohol, name is 1-Ethylpiperidin-3-ol, and the molecular formula is C8H5F3O2S, SDS of cas: 13444-24-1.

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

Huang, Renfeng published the artcileTuning reaction pathways of peroxymonosulfate-based advanced oxidation process via defect engineering, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Cell Reports Physical Science (2021), 2(9), 100550, database is CAplus.

Peroxymonosulfate (PMS)-based advanced oxidation process (AOP) has attracted great attention as an effective technique for oxidatively decomposing organic pollutants. The PMS activation mechanisms, nevertheless, are still ambiguous in many cases, and, thus, controlling PMS activation pathways for efficient pollutant removal remains challenging. In this work, taking defective PrBa0.5Sr0.5Co1.5Fe0.5O5+v (PBSCF) as a model system, we demonstrate that oxygen vacancies (V•bulo) strongly promote PMS-based AOP, and PMS activation pathways are effectively tuned. Excessive V•bulos are found to modify the surface charge distribution, change PMS adsorption configuration, and break the S-O bond of PMS. As a result, the radical process is promoted, and the predominant nonradical activation pathway shifts from an electron transfer process to singlet oxygen formation. Our mechanistic understanding can guide the rational design of catalysts for efficient water remediation.

Cell Reports Physical Science 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

Huang, Xixian published the artcileMechanism Insight into Efficient Peroxydisulfate activation by Novel Nano Zero-valent Iron Anchored yCo₃O₄ (nZVI/yCo₃O₄) Composites, Safety of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Journal of Hazardous Materials (2020), 123157, database is CAplus and MEDLINE.

Novel nano zero-valent iron anchored bio-matrix supported Co₃O₄ (nZVI/yCo₃O₄) composites were fabricated for tetracycline (TC) efficient degradation by activating peroxydisulfate (PS). The systematical characterizations verified that the nZVI/yCo₃O₄ composites with magnetism have higher surface area than yCo₃O₄ and pure Co₃O₄, contributing to more accessible active sites. Various catalytic parameters (nZVI mass ratio, leached ions, initial pH, catalyst dosage, PS concentration and coexisting anions) were thoroughly investigated. In nZVI/yCo₃O₄/PS system, 97.6%, 93.4% and 77.3% TC were degraded within 15 min at pH 3.0, 6.0 and 9.0, resp. Based on four successive degradation runs, the excellent mineralization rate and reusability of nZVI/yCo₃O₄ composites were mainly benefited from the suppressed metals leaching. The PS activated mechanisms were proposed as non-radicals (¹O₂) dominated pattern at acidic conditions and radicals (SO^{â€?/sup>-₄) predominant pattern at alk. environment, which may be highly related to the electron donating capacity of nZVI at different pH and the M(n+1)+/Mn+ redox cycling between Fe or Co metal. The plausible degradation routes of TC were presented based on the detected intermediates. Overall, the synthesized heterogeneous nZVI/yCo₃O₄ composites can efficiently active PS at a wide pH range, and further broaden the application of Co-based catalysts in PS activation.}

Journal of Hazardous 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, Safety of 2,2,6,6-Tetramethylpiperidin-4-one.

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

Zhou, Chan published the artcileEfficient activation of peroxymonosulfate on CuS@MIL-101(Fe) spheres featured with abundant sulfur vacancies for coumarin degradation: Performance and mechanisms, HPLC of Formula: 826-36-8, the publication is Separation and Purification Technology (2021), 119404, database is CAplus.

For improving the catalytic activity and recyclability of CuS in Fenton-like reaction processes, novel sulfur vacancies-enriched CuS@MIL-101(Fe) was constructed, characterized, and examined as heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade coumarin (COU). Thanks to the redox pairs of Fe3+/Fe2+, Cu+/Cu2+, S2-/S2-2/S0/sulfate species, copper-iron synergistic effect and sulfur vacancies, the CuS@MIL-101(Fe) realized a complete removal of COU (30μM) in 10 min with reaction rate constant of 0.577 min-1, which was 11.1 and 17.0 times of CuS and MIL-101(Fe), resp. The effect of various exptl. conditions (i.e., initial pH, CuS@MIL-101(Fe) dosage, PMS concentration, and background anions) on COU degradation was discussed, and the stability and versatility of CuS@MIL-101(Fe) was studied as well. Radical scavenging experiments and ESR (EPR) spectroscopy identified ·OH and 1O2 as the main reactive oxygen species (ROS). Finally, the possible mechanism of higher COU degradation efficiency in the CuS@MIL-101(Fe) activated PMS system and the degradation pathways were also deeply explored. Consequently, this work provided a novel insight into construction of sulfur vacancies-enriched heterogeneous catalysts for efficiently activating PMS for refractory organic pollutants elimination.

Separation and Purification 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 C10H16O2, HPLC of Formula: 826-36-8.

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