Category: piperidines

Li, Meng published the artcileCopper-Catalyzed 3-Positional Amination of 2-Azulenols with O-Benzoylhydroxylamines, Quality Control of 73874-95-0, the main research area is azulenol benzoylhydroxylamine copper catalyst regioselective amination; aminoazulenol preparation.

A copper-catalyzed ortho-selective amination of 2-azulenols with O-benzoylhydroxylamines (RR’N-OBz) to synthesize ortho-aminoazulenols was reported. A wide range of functional groups on amines were compatible, furnishing the corresponding amino-azulene derivatives in moderate to good yields. The further synthetic elaboration using 3-amino-2-azulenols as starting materials was demonstrated.

Organic Letters published new progress about Amination catalysts (regioselective). 73874-95-0 belongs to class piperidines, name is tert-Butyl piperidin-4-ylcarbamate, and the molecular formula is C10H20N2O2, Quality Control of 73874-95-0.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Desai, Umang published the artcileEnhancement of resistance against damp heat aging through compositional change in photovoltaic encapsulant poly (ethylene-co-vinyl acetate), Application In Synthesis of 52829-07-9, the main research area is polyethylene vinyl acetate copolymer resistance damp heat photovoltaic encapsulant.

The most common encapsulant used in the photovoltaic (PV) modules is poly (ethylene-co-vinyl acetate) (PEVA). The characteristics of PEVA can be varied by modulating its vinyl acetate (VA) content. According to the general consensus within the PV industry, PEVA as an encapsulant should have VA content between 28 and 33%. Degradation of PEVA films due to environmental stressors like humidity, temperature and solar radiation in the field aged modules is not uncommon. Moreover, degradation of PEVA encapsulant implies a concomitant loss in the elec. performance of the PV modules. VA content modulation especially outside the most commonly used and accepted range has been tried in this study to improve the damp heat aging resistance of PEVA films. PEVA films containing 18, 24, 33, and 40% VA content with the necessary additives have been fabricated and cured at 150°C under vacuum and subsequently subjected to accelerated damp-heat (85°C and 85% RH) aging according to IEC 61215 standard for 1000 and 2000 h. Tensile strength, thermal stability and degree of crosslinking have been found to be greater for PEVA containing lower VA content (18 and 24%) and diminished for PEVA with higher VA content (33 and 40%) due to DH aging. However, inadequate % transmittance and relatively high stiffness after 2000 h of DH aging discourages PEVA18 as an encapsulant. Moreover, PEVAs with higher VA content (33 and 40%) have been degraded significantly after 2000 h of DH aging resulting in significant loss in transmittance and mech. integrity. Therefore, the results of this investigation encourage the PV industry to reduce the VA content in PEVA down to 24% for better encapsulation response against DH aging.

Solar Energy published new progress about Differential scanning calorimetry. 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, Application In Synthesis of 52829-07-9.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Blazquez-Blazquez, Enrique published the artcileIdentification of Additives in Polypropylene and Their Degradation under Solar Exposure Studied by Gas Chromatography-Mass Spectrometry, COA of Formula: C28H52N2O4, the main research area is polypropylene additive solar gas chromatog.

Additives are absolutely essential in the development of com. polymeric materials. Accordingly, an exhaustive control of composition and evolution in these additives over time is necessary to validate their performance and safety during their shelf life and, consequently, their ultimate applications. Gas chromatog. coupled with mass spectrometry, GC-MS, is described in the present work to identify and analyze the content of a wide variety of additives, commonly used in industrial polymeric materials. First, the identification under the present exptl. protocol of additives with a relatively high mol. weight (Irganox 1330 and Irganox 1010) has been successfully attained. Second, the evolution under solar exposure over time has been analyzed by GC-MS for 11 additives and derived substances have been identified in a com. polypropylene sample, estimating the corresponding depletion times. In addition, the resultant increase of carbonyl groups in the polymeric macrochains along the photo-oxidation has been also determined by IR spectroscopy. Therefore, GC-MS is found to be a reliable tool for the anal. of the evolution of commonly used polymer additives under specific degradation conditions, which can be very useful in the formulation of improved future additivations.

ACS Omega published new progress about Environmental polymer degradation. 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, COA of Formula: C28H52N2O4.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Roque, Jose B. published the artcileC-C Cleavage Approach to C-H Functionalization of Saturated Aza-Cycles, Quality Control of 73874-95-0, the main research area is aryl aza cyclic compound preparation visible light; fused hydroxy lactam preparation aryl halide arylation palladium catalyst; C─C cleavage; Norrish–Yang; cross-coupling; cyclic amines; palladium; strain release.

Saturated cyclic amines (aza-cycles) are ubiquitous structural motifs found in pharmaceuticals, agrochems., and bioactive natural products. Given their importance, methods that directly functionalize aza-cycles are in high demand. Herein, we disclose a fundamentally different approach to functionalizing cyclic amines which relies on C-C cleavage and attendant cross-coupling. The initial functionalization step is the generation of underexplored N-fused bicyclo α-hydroxy-β-lactams under mild, visible light conditions using a Norrish-Yang process to affect α-functionalization of saturated cyclic amines. This approach is complementary to previous methods for the C-H functionalization of aza-cycles and provides unique access to various cross-coupling adducts. In the course of these studies, we have also uncovered an orthogonal, base-promoted opening of the N-fused bicyclo α-hydroxy-β-lactams. Computational studies have provided insight into the origin of the complementary C-C cleavage processes.

ACS Catalysis published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 73874-95-0 belongs to class piperidines, name is tert-Butyl piperidin-4-ylcarbamate, and the molecular formula is C10H20N2O2, Quality Control of 73874-95-0.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Choi, Sung-Seen published the artcileAnalysis of cyclic pyrolysis products formed from amino acid monomer, Recommanded Product: Methyl 1-methylpiperidine-2-carboxylate, the main research area is amino acid pyrolysis cyclic product identification GC mass spectrometry.

Amino acid was mixed with silica and tetramethylammonium hydroxide (TMAH) to favor pyrolysis of amino acid monomer. The pyrolysis products formed from amino acid monomer were characterized by GC/MS and GC. Twenty amino acids of alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine were studied. The pyrolysis products were divided into cyclic and noncyclic products. Among the 20 amino acids, arginine, asparagine, glutamic acid, glutamine, histidine, lysine, and phenylalanine generated cyclic pyrolysis products of the monomer. New cyclic pyrolysis products were formed by isolation of amino acid monomers. They commonly had polar side functional groups to 5-, 6-, or 7-membered ring structure. Arginine, asparagine, glutamic acid, glutamine, histidine, and phenylalanine generated only 5- or 6-membered ring products. However, lysine generated both 6- and 7-membered ring compounds Variations of the relative intensities of the cyclic pyrolysis products with the pyrolysis temperature and amino acid concentration were also studied.

Journal of Chromatography A published new progress about Amino acids Role: RCT (Reactant), RACT (Reactant or Reagent). 1690-74-0 belongs to class piperidines, name is Methyl 1-methylpiperidine-2-carboxylate, and the molecular formula is C8H15NO2, Recommanded Product: Methyl 1-methylpiperidine-2-carboxylate.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Rajbux, Chandisree published the artcileAssessment of baby Bibs. GC-MS screening, migration into saliva and insight of toxicity with QSAR tools, HPLC of Formula: 52829-07-9, the main research area is baby bib GCMS screening artificial saliva migration QSAR toxicity.

Plastic baby Bibs are, according to the European legislation, food contact materials. Therefore, compositional and migration limits applicable to plastics should be observed This work aimed at identifying potential migrants in Bibs from European market and determining the migration into artificial saliva. Bibs were subjected to screening analyses (GC-MS). Thirty substances non-authorised in European or Swiss legislation were detected: phthalates, light stabilizers, flame retardants and photoinitiators. Irgacure 184, Cyclohexanone, Tinuvin 770, Isophorone and 9-Octadecenamide, (Z)- were detected in saliva after contact with selected Bibs. The migration values render two samples noncompliant although results should be interpreted with caution given the exptl. conditions. In order to gain insight on the toxicity of migrants, QSAR tools were applied. Substances non-evaluated or not-listed were analyzed with free software regarding their Cramer class ToxTree and their predicted mutagenicity, carcinogenicity and developmental toxicity (VEGA). Results indicate that surveillance is required: monitoring Bibs′compliance, application of GMPs and traceability.

Food Control published new progress about Alkylbenzenes Role: ANT (Analyte), ANST (Analytical Study). 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, HPLC of Formula: 52829-07-9.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Verma, Pritha published the artcileIridium(I)-Catalyzed α-C(sp3)-H Alkylation of Saturated Azacycles, Quality Control of 73874-95-0, the main research area is saturated azacycle regioselective alkylation alkene iridium amidoxime directing group; iridium regioselective alkylation catalyst.

Saturated azacycles are commonly encountered in bioactive compounds and approved therapeutic agents. The development of methods for functionalization of the α-methylene C-H bonds of these highly privileged building blocks is of great importance, especially in drug discovery. While much effort has been dedicated towards this goal of using a directed C-H activation approach, the development of directing groups that are both general, as well as practical, remains a significant challenge. Herein, the design and development of novel amidoxime directing groups is described for Ir(I)-catalyzed α-C(sp3)-H alkylation of saturated azacycles using readily available olefins as coupling partners. This protocol extends the scope of saturated azacycles to piperidines, azepane, and tetrahydroisoquinoline that are incompatible with our previously reported directing group. A variety of olefin coupling partners, including previously unreactive di-substituted terminal olefins and internal olefins, are compatible with this transformation. The selectivity for a branched α-C(sp3)-alkylation product is also observed for the first time when acrylate is used as the reaction partner. The development of practical, one-step installation and removal protocols further add to the utility of amidoxime directing groups.

Journal of the American Chemical Society published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 73874-95-0 belongs to class piperidines, name is tert-Butyl piperidin-4-ylcarbamate, and the molecular formula is C10H20N2O2, Quality Control of 73874-95-0.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Sun, Xiaolong published the artcileThermal aging behavior characteristics of asphalt binder modified by nano-stabilizer based on DSR and AFM, Recommanded Product: Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, the main research area is asphalt binder amine thermal aging dynamic.

In order to clarify the effect of thermal aging on the nano-stabilized modified asphalt binder, TINUVIN 770 (T770) hindered amine light stabilizer of nanoscale was selected as aging modifying agent to prepare modi fixed asphalt. The impact of thermal aging on the rheo logical properties of T770-modified asphalt was investigated using dynamic shear rheol. test of frequency sweep and multiple stress creep recovery test. The surface rough ness variation of T770-modified asphalt was characterized by using at. force microscope throughout the thermal aging process. Furthermore, the typical morphol. and parameter features of T770-modified asphalt were identified. The results showed that with the extension of thermal aging time, the high temperature rutting resistance of T770-modified asphalt was improved, while the unrecoverable creep compliance was degraded. When the thermal aging time exceeded 6 h, the bee structure appeared on the surface of T770-modified asphalt. Meanwhile, with the increase in thermal aging time, the special structure formed on the surface of asphalt gradually became smaller. The surface fluctuation difference of T770-modified asphalt reflected the better thermal aging resistance property of T770-modified asphalt than 70# asphalt.

Nanotechnology Reviews published new progress about Amines Role: NUU (Other Use, Unclassified), USES (Uses). 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, Recommanded Product: Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Gangireddy, Madhu Sudhana Reddy published the artcileDesign, synthesis and molecular docking of piperidin-4-amine linked pyrimidine derivatives as potent anticancer agents, COA of Formula: C10H20N2O2, the main research area is aminopiperidinyl hydroxycyclohexylamino pyrimidine carboxamide preparation cytotoxicity antitumor SAR docking.

A series of rationally designed novel hybrid piperidin-4-amine linked pyrimidine derivatives I [R = n-propylamino, cyclobutylamino, phenylethylamino, etc.] were synthesized. Compound I [R = 3,4-dimethoxyphenylethylamino] was found to be most potent with (IC50 = 1.92μM, 60.94% inhibition), while I [R = 4-pyridylethylamino] (IC50 of 5.2μM, 66.45% inhibition), the second most potent among all, against HepG2 human liver cancer cell lines. Compounds I [R = 4-pyridylethylamino, 4-fluorophenylmethylamino] exhibited excellent inhibition percentages of 66.45 and 68.76 resp., compared to pos. control Paclitaxel (62.12%). In-silico target hunting for the potent compounds I [R = 3,4-dimethoxyphenylethylamino, 4-pyridylethylamino] revealed two possible targets, one was binding with human estrogen receptor and other one was inhibiting tubulin polymerization The mol. docking studies suggested that compounds I [R = 3,4-dimethoxyphenylethylamino, 4-pyridylethylamino] with hydrophobic group linked by an alkyl chain may facilitate free access in the Helix 12 domain (in determining potency plays a crucial role) in the human estrogen receptor’s active and also inhibiting the tubulin polymerase by binding site at α/β-tubuline interface at colchicine binding site.

Chemical Data Collections published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 73874-95-0 belongs to class piperidines, name is tert-Butyl piperidin-4-ylcarbamate, and the molecular formula is C10H20N2O2, COA of Formula: C10H20N2O2.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem

Huo, Haibo published the artcileSynthesis and biological evaluation of novel steroidal pyrazole amides as highly potent anticancer agents, SDS of cas: 73874-95-0, the main research area is androstynyl pyrazolyl amide preparation antitumor apoptosis SAR; Amide derivatives; Antiproliferative activity; Cell cycle; Hydrochloride derivatives; Steroidal pyrazoles.

A series of thirty-six steroidal pyrazole amides, I, II [R = methylamino, 4-fluoroanilino, piperazinyl, etc.] divided into two categories based on their main skeletons were designed and synthesized via a five-step synthetic route. The final product was obtained through Pinnick oxidation of pyrazole aldehydes to yield the corresponding acids, which then underwent amidation to afford the target products efficiently under mild reaction conditions. Structures of the desired compounds were confirmed by 1H NMR, 13C NMR, high resolution mass spectrometry; X-ray structural characterization of compound II [R = piperazinyl] was also obtained. The synthesized compounds I, II were screened for their antiproliferative activity against four cancer cell lines (Pc-3 A549, Hela, HepG2) using the SRB method. Amides I,II [R = piperazinyl], and hydrochlorides II [R = 2-aminoethylamino, 2-aminopyrrolidinyl, 4-aminopiperidyl, etc.] exhibited moderate to high cytotoxic activities with IC50 values ranging from 2.05 to 8.73μM. Of note, the hydrochloride derivative II [R = piperazinyl] displayed the highest activity towards PC-3 cells with IC50 values of 2.05μM. Anal. of structure-activity relationships indicated that the presence of the diamine moiety and the aqueous solubility of the derivatives were vital factors for antiproliferative potency. Furthermore, mol. hydrochloride II [R = piperazinyl] induced PC-3 cells apoptosis and arrested cell cycle at G1 phase in a dose-dependent manner.

Steroids published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 73874-95-0 belongs to class piperidines, name is tert-Butyl piperidin-4-ylcarbamate, and the molecular formula is C10H20N2O2, SDS of cas: 73874-95-0.

Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem