Category: piperidines

Borodkin, G. I. published the artcileReaction of Nitrosonium Tetrafluoroborate with Nitroxyl Radicals, Name: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, the publication is Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii) (2003), 39(8), 1144-1150, database is CAplus.

It was established by means of multinuclear magnetic resonance method (¹H, ¹³C, ¹⁹F and ¹⁴N) that reaction of 2,2,6,6-tetramethyl-4-R-piperidin-1-oxyl radicals (R = H, OH, OMe, OCOPh, NHCOMe) with nitrosonium tetrafluoroborate gave rise to the corresponding 2,2,6,6-tetramethyl-1-oxo-4-R-piperidinium tetrafluoroborates. Linear correlations were found between the chem. shifts of atoms H⁴, C⁴ of cations and resp. σ₁-constants of substituents R and chem. shifts of C⁴ atom calculated from increments of substitution. The conformational features of the generated nitrosonium cations are considered on the grounds of vicinal coupling constants J_HH and quantum-chem. calculations by AM1 method.

Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii) 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, Name: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate.

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

Tanaka, Susumu published the artcileHighly Efficient Singlet Oxygen Generation and High Oxidation Resistance Enhanced by Arsole-Polymer-Based Photosensitizer: Application as a Recyclable Photooxidation Catalyst, Related Products of piperidines, the publication is Macromolecules (Washington, DC, United States) (2020), 53(6), 2006-2013, database is CAplus.

Photosensitizers have attracted considerable attention in various fields such as organic synthesis and medical care. For the development of high-performance photosensitizers, highly efficient and persistent singlet oxygen generators (¹O₂) having a high oxidation tolerance are strongly required. This study presents a detailed investigation of dithieno[3,2-b:2′,3′-d]arsole-fluorene copolymer for its ¹O₂ generation ability and application as a photooxidation catalyst in vital organic reactions. Photoirradiation of an air-saturated solution of the polymer generates ¹O₂, which was detected by ¹O₂ scavengers such as dihydronaphthoquinone and diphenylisobenzofuran. The polymer photosensitizer was completely stable in the presence of the strong oxidant ¹O₂. The photosensitizer showed the highest quantum yield of ¹O₂ generation (Φ = 0.54) in single-component main-chain type π-conjugated polymers. The quantum yield of the arsenic-free analog of the polymer-bithiophene-fluorene copolymer-was significantly lower (Φ = 0.14), suggesting that the heavy-atom effect of arsenic can improve the efficiency of intersystem crossing (ISC) from the singlet excited state to the triplet excited state of the photosensitizer. In addition, when utilized as a recyclable photocatalyst for the oxidation reaction, the photosensitizer exhibited excellent oxidation resistance without losing its recognizable catalytic activity. Finally, we demonstrated the release of ¹O₂ into the air by a film of the present polymer. Persistent ¹O₂ generation was observed on film irradiation without polymer decomposition These results suggested that the polymer exhibited excellent oxidation resistance in solution as well as in the solid state. The present mol. design concept of the photosensitizer using the main group element can facilitate the development of further functional optical materials.

Macromolecules (Washington, DC, United States) 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 C12H15NO, Related Products of piperidines.

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

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

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

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

Del Bubba, Massimo published the artcileEnantiomeric resolution of chiral aromatic sulfoxides on non-commercial microcrystalline cellulose triacetate and commercial cellulose acetate plates, Quality Control of 4972-31-0, the publication is Journal of Planar Chromatography–Modern TLC (2012), 25(6), 498-503, database is CAplus.

This paper reports a number of original thin-layer chromatog. enantioseparations of chiral sulfoxides that are important for their use as drugs and drug metabolites or pesticides, obtained by elution with aqueous-alc. mixtures at different ratios. Noncom. microcrystalline cellulose triacetate and com. cellulose acetate (CEL 300-10/a.c., Macherey-Nagel) plates were compared for their chiral resolution power, evidencing the much better performances of the former. The linearity of the densitometric response as a function of the amount of each enantiomer applied to the plate was studied for selected compounds Correlation coefficients higher than or equal to 0.99 were obtained in all cases, and the feasibility of the quantification of the individual enantiomers at tens to hundreds of nanograms spotted was demonstrated.

Journal of Planar Chromatography–Modern TLC 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, Quality Control of 4972-31-0.

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

Zuo, Zeping published the artcileDesign and biological evaluation of tetrahydropyridine derivatives as novel human GPR119 agonists, Recommanded Product: Piperidine-4-carboxamide, the publication is Bioorganic & Medicinal Chemistry Letters (2020), 30(4), 126855, database is CAplus and MEDLINE.

A series of novel tetrahydropyridine derivatives were prepared and evaluated using cell-based measurements. Systematic optimization of general structure G-1 led to the identification of compound 4-((4-(1H-tetrazol-1-yl)phenoxy)methyl)-2-(1-(5-ethylpyrimidin-2-yl)1,2,3,6-tetrahydropyridin-4-yl)thiazole (EC₅₀ = 4.9 nM) and 2-(1-(5-ethylpyrimidin-2-yl)-1,2,3,6-tetrahydropyridin-4-yl)-4-((2-fluoro-4(1H-tetrazol-1-yl)phenoxy)methyl)thiazole (EC₅₀ = 8.8 nM) with high GPR119 agonism activity and moderate clog P. Through single and long-term pharmacodynamic experiments, compound 4-((4-(1H-tetrazol-1-yl)phenoxy)methyl)-2-(1-(5-ethylpyrimidin-2-yl)1,2,3,6-tetrahydropyridin-4-yl)thiazole showed a hypoglycemic effect and may have an effect on improving basal metabolic rate in DIO mice. Both in vitro and in vivo tests indicated that compound 4-((4-(1H-tetrazol-1-yl)phenoxy)methyl)-2-(1-(5-ethylpyrimidin-2-yl)1,2,3,6-tetrahydropyridin-4-yl)thiazole was a potential potent GPR119 agonist in allusion to T2DM treatment.

Bioorganic & Medicinal Chemistry Letters 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 C9H7NO2, Recommanded Product: Piperidine-4-carboxamide.

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

Sundriyal, Sandeep published the artcileHistone lysine methyltransferase structure activity relationships that allow for segregation of G9a inhibition and anti-Plasmodium activity, Application In Synthesis of 39546-32-2, the publication is MedChemComm (2017), 8(5), 1069-1092, database is CAplus and MEDLINE.

Plasmodium falciparum HKMTs (PfHKMTs) play a key role in controlling Plasmodium gene expression and represent exciting new anti-malarial epigenetic targets. Using an inhibitor series derived from the diaminoquinazoline HKMT inhibitory chemotype, we have previously identified compounds with highly promising antimalarial activity, including irreversible asexual cycle blood stage-independent cytotoxic activity at nM concentrations, oral efficacy in in vivo models of disease, and the unprecedented ability to reactivate dormant liver stage parasites (hypnozoites). However, future development of this series will need to address host vs. parasite selectivity, where inhibitory activity against human G9a is removed from the lead compounds, while maintaining potent anti-Plasmodium activity. Herein, we report an extensive study of the SAR of this series against both G9a and P. falciparum. We have identified key SAR features which demonstrate that high parasite vs. G9a selectivity can be achieved by selecting appropriate substituents at position 2, 4 and 7 of the quinazoline ring. We have also, in turn, discovered that potent G9a inhibitors can be identified by employing a 6-carbon ‘Nle mimic’ at position 7. Together, this data suggests that while broadly similar, the G9a and potential PfHKMT target(s) binding pockets and/or binding modes of the diaminoquinazoline analogs exhibit clear and exploitable differences. Based on this, we believe this scaffold to have clear potential for development into a novel anti-malarial therapeutic.

MedChemComm 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 C6H8N2, Application In Synthesis of 39546-32-2.

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

Mo, Jun published the artcileDesign, synthesis, in vitro and in vivo evaluation of benzylpiperidine-linked 1,3-dimethylbenzimidazolinones as cholinesterase inhibitors against Alzheimer’s disease, HPLC of Formula: 39546-32-2, the publication is Journal of Enzyme Inhibition and Medicinal Chemistry (2020), 35(1), 330-343, database is CAplus and MEDLINE.

Cholinesterase inhibitor plays an important role in the treatment of patients with Alzheimer’s disease (AD). Herein, we report the medicinal chem. efforts leading to a new series of 1,3-dimethylbenzimidazolinone derivatives Among the synthesized compounds, and showed submicromolar IC₅₀ values (, eeAChE IC₅₀ = 0.39 ± 0.11μM; , eqBChE IC₅₀ = 0.16 ± 0.04μM) towards acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Kinetic and mol. modeling studies revealed that and act in a competitive manner. and showed neuroprotective effect against H₂O₂-induced oxidative damage on PC12 cells. This effect was further supported by their antioxidant activity determined in a DPPH assay in vitro. Morris water maze test confirmed the memory amelioration effect of the two compounds in a scopolamine-induced mouse model. Moreover, the hepatotoxicity of and was lower than tacrine. In summary, these data suggest and are promising multifunctional agents against AD.

Journal of Enzyme Inhibition and 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, HPLC of Formula: 39546-32-2.

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