Category: pyridine-derivatives

On August 31, 2020, Xu, Guangpeng; Zhang, Yajing; Sun, Jihong; Bai, Shiyang; Zhao, Hongwu published an article.Electric Literature of 75449-26-2 The title of the article was Synthesis of Extended Bipyridine-proline Chiral Catalysts and Resulting Effects on the Asymmetric Aldol Reactions of Bulkier Aldehyde Derivatives with Cyclohexanone. And the article contained the following:

Axially-unfixed 2,2′-bipyridine-based chiral catalysts were synthesized using enantiopure amino acids as chiral sources, which were successfully used in asym. aldol reactions of p-nitrobenzaldehyde with cyclohexanone, while the bulkier aldehyde derivatives (2-naphthaldehyde, 9-anthracenecarboxaldehyde, and 1-pyrenecarboxaldehyde) were selected to further elucidate the catalytic properties. Particularly, the influences of the bipyridine-proline chiral structures and the polarities of used solvents (petroleum ether, toluene, CH2Cl2, ethanol, DMF, DMSO, and water) on the catalytic performance were investigated. The results indicated that the structure of bipyridine catalysts, the mol. volume of aldehydes, and the polarity of solvents have significant effects on the catalytic activities, in which, the smaller steric effects were conducive to the improvement of the yields and stereoselectivities for asym. aldol reaction, along with the increased polarity of used solvents and the decreased mol. volume of aldehydes. Meanwhile, the chem. identity of all compounds was confirmed by 1H-NMR, 13C-NMR, HRMS, and HPLC anal. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Electric Literature of 75449-26-2

The Article related to bipyridinyl proline preparation, cyclohexanone aryl aldehyde bipyridinyl proline catalyst diastereoselective aldol reaction, aryl hydroxymethyl cyclohexanone preparation, General Organic Chemistry: Synthetic Methods and other aspects.Electric Literature of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On June 1, 2018, Zhu, Cheng-Liang; Wang, Cheng; Qin, Qi-Xue; Yruegas, Sam; Martin, Caleb D.; Xu, Hao published an article.Related Products of 109660-12-0 The title of the article was Iron(II)-Catalyzed Azidotrifluoromethylation of Olefins and N-Heterocycles for Expedient Vicinal Trifluoromethyl Amine Synthesis. And the article contained the following:

We report herein an iron-catalyzed azidotrifluoromethylation method for expedient vicinal trifluoromethyl primary-amine synthesis. This method is effective for a broad range of olefins and N-heterocycles, and it facilitates efficient synthesis of a wide variety of vicinal trifluoromethyl primary amines, including those that prove difficult to synthesize with existing approaches. Our preliminary mechanistic studies revealed that the catalyst-promoted azido-group transfer proceeds through a carbo-radical instead of a carbocation species. Characterization of an active iron catalyst through X-ray crystallog. studies suggests that in situ generated, structurally novel iron-azide complexes promote the oxidant activation and selective azido-group transfer. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Related Products of 109660-12-0

The Article related to trifluoromethyl primary amine preparation, olefin azidotrifluoromethylation iron catalyst, n-heterocycles, azides, iron catalysis, olefins, trifluoromethyl amines, General Organic Chemistry: Synthetic Methods and other aspects.Related Products of 109660-12-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On May 4, 2018, Shen, Shou-Jie; Zhu, Cheng-Liang; Lu, Deng-Fu; Xu, Hao published an article.Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine The title of the article was Iron-Catalyzed Direct Olefin Diazidation via Peroxyester Activation Promoted by Nitrogen-Based Ligands. And the article contained the following:

We herein report an iron-catalyzed direct diazidation method via activation of bench-stable peroxyesters promoted by nitrogen-based ligands. This method is effective for a broad range of olefins and N-heterocycles, including those that are difficult substrates for the existing olefin diamination and diazidation methods. Notably, nearly a stoichiometric amount of oxidant and TMSN3 are sufficient for high-yielding diazidation for most substrates. Preliminary mechanistic studies elucidated the similarities and differences between this method and the benziodoxole-based olefin diazidation method previously developed by us. This method effectively addresses the limitations of the existing olefin diazidation methods. Most notably, previously problematic nonproductive oxidant decomposition can be minimized. Furthermore, X-ray crystallog. studies suggest that an iron-azide-ligand complex can be generated in situ from an iron acetate precatalyst and that it may facilitate peroxyester activation and the rate-determining C-N3 bond formation during diazidation of unstrained olefins. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

The Article related to iron catalysis direct stereoselective olefin diazidation peroxyester activation, n-heterocycles, diamination, diazidation, iron catalyst, olefins, peroxyesters, General Organic Chemistry: Synthetic Methods and other aspects.Application In Synthesis of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhao, Hong-Wu; Li, Hai-Long; Yue, Yuan-Yuan; Sheng, Zhui-Hui published an article in 2013, the title of the article was Diastereoselective and Enantioselective Michael Addition Reactions of Ketones and Aldehydes to Nitro Olefins Catalyzed by C2-Symmetric Axially-Unfixed Biaryl-Based Organocatalysts Derived from Enantiopure α-Proline.Reference of [2,2′-Bipyridine]-3,3′-diamine And the article contains the following content:

A new class of axially-unfixed biaryl-based pyrrolidines with C2-symmetry, e.g. I [X = C, N], were designed and synthesized by using enantiopure α-proline as a chiral source. These bifunctional organocatalysts provided Michael adducts in high chem. yields (up to 99 %) and with excellent stereoselectivities (up to 99:1 dr and 96 % ee) in the direct Michael addition reactions of a variety of ketones and aldehydes to nitro olefins. The transition states were proposed to clarify the stereochem. course of the examined reactions. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Reference of [2,2′-Bipyridine]-3,3′-diamine

The Article related to preparation biaryl pyrrolidine c 2 symmetry michael addition catalyst, stereoselective michael addition ketone aldehyde nitro olefin, General Organic Chemistry: Synthetic Methods and other aspects.Reference of [2,2′-Bipyridine]-3,3′-diamine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 7, 2022, Li, Hanyuan; Wang, Mei-Ling; Liu, Yu-Wen; Li, Ling-Jun; Xu, Hui; Dai, Hui-Xiong published an article.Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine The title of the article was Enones as Alkenyl Reagents via Ligand-Promoted C-C Bond Activation. And the article contained the following:

A β-carbon elimination strategy for alkene(sp2)-C(O) bonds to realize the olefination of unstrained enones via a vinyl palladium species, which delivered a series of conjugated polyene compounds were reported. The protocol features broad substrate scope, functional group tolerance and can be extended to dibenzylideneacetone (dba) substrates for olefination, alkynylation, arylation and amination, which demonstrates the generality of the approach and affords two valuable products in one pot. Furthermore, the modification of natural products (β-ionone and acetyl cedrene) and synthesis of natural products (piperine, lignarenone, novenone) highlight the potential utility of the reaction. The experimental process involved the reaction of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine(cas: 109660-12-0).Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

The Article related to enone acrylate palladium oxazole catalyst diastereoselective olefination, alkadienoate preparation, General Organic Chemistry: Synthetic Methods and other aspects.Reference of 2-(4,5-Dihydro-4,4-dimethyl-2-oxazolyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 30, 2014, Kouki, Noura; Tayeb, Rafik; Dhahbi, Mahmoud published an article.Quality Control of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate The title of the article was Recovery of acetaminophen from aqueous solutions using a supported liquid membrane based on a quaternary ammonium salt as ionophore. And the article contained the following:

A flat sheet-supported liquid membrane (FSSLM) system, consisting of an ionic liquid, tricapryl-methylammonium chloride (Aliquat 336) in octan-2-ol, is proposed as a means of recovering acetaminophen (Ac) from aqueous solutions; Ac is an active ingredient widely used in many pharmaceutical preparations Several parameters which could affect the transport efficiency were examined, i.e., the strippant nature and concentration in the receiving solution, the diluent nature, carrier concentration, initial acetaminophen concentration in the feed solution, and the polymeric support type. A facilitated transport was obtained by impregnating the polymeric support with 10 volume ^of Aliquat 336 in octan-2-ol, 1 M NaOH as a receiving solution, and a feed solution of Ac dissolved in ultrapure water. The study was completed by using the FSSLM thus developed for extracting Ac from some drugs in frequent use in Tunisia (Analgan, Doliprane, and Fervex). The experimental process involved the reaction of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate(cas: 132-20-7).Quality Control of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate

The Article related to acetaminophen aqueous liquid membrane quaternary ammonium salt ionophore, Pharmaceuticals: Formulation and Compounding and other aspects.Quality Control of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 31, 2011, Mehul, Dave; Senthil, A.; Hardik, Thakkar R.; Ravikumar; Tejas, Lad published an article.SDS of cas: 132-20-7 The title of the article was Formulation and evaluation of orodispersible tablets of pheniramine maleate. And the article contained the following:

Orodispersible tablets of pheniramine maleate were prepared by direct compression method using three super disintegrants, viz., croscarmellose sodium, crospovidone and sodium starch glycolate at different concentrations with microcrystalline cellulose were used along with sodium bicarbonate and citric acid as effervescent agent. Orodispersible tablet is the fast growing and highly accepted drug delivery system, convenience of self administration, compactness and easy manufacturing Pheniramine maleate is a member of alkylamine class of H1 receptor antagonists. It is an antihistamine used in the treatment of allergic conditions including urticaria and angioedema. It is completely absorb after oral administration. The bland were examined for angle of repose, bulk d., tapped d., compressibility index and hausner’s ratio. The prepared tablets were evaluated for thickness, hardness, friability, and weight variation, content uniformity, wetting time, Water absorption ratio, in-vitro dispersion time, dissolution studies and FTIR studies. Twelve formulations F1 to F12 were prepared with three super disintegrants with different concentration The optimum formulation was chosen and their optimum results were found to be in close agreement with exptl. finding. Among three super disintegrants crospovidone F5 emerged as overall best formulation. Short-term stability studies on the formulations indicated no significant changes in the drug content and in vitro dispersion time (p < 0.05). The experimental process involved the reaction of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate(cas: 132-20-7).SDS of cas: 132-20-7

The Article related to pheniramine maleate orodispersible tablet formulation superdisintegrant, Pharmaceuticals: Formulation and Compounding and other aspects.SDS of cas: 132-20-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 2, 2015, Wang, Yansong; Hausch, Felix published a patent.HPLC of Formula: 97483-79-9 The title of the patent was Bicyclic aza-amides for treatment of psychiatric disorders. And the patent contained the following:

The present invention relates to compounds of formula (I) having a bicyclic aza-amides scaffold, pharmaceutically acceptable salts of these compounds and pharmaceutical compositions containing at least one of these compounds together with pharmaceutically acceptable carrier, excipient and/or diluents. Said bicyclic aza-amides compounds can be used for prophylaxis and/or treatment of psychiatric disorders and neurodegenerative diseases, disorders and conditions. The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).HPLC of Formula: 97483-79-9

The Article related to bicyclic aza amide preparation fkbp inhibitor psychiatric neurol disease, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.HPLC of Formula: 97483-79-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 29, 2014, Wang, Yansong; Hausch, Felix published a patent.Electric Literature of 97483-79-9 The title of the patent was Preparation of bicyclic aza-amides for treatment of psychiatric disorders. And the patent contained the following:

The invention relates to bicyclic aza-amides of formula I as inhibitors of FK506 binding proteins (FKBP) useful in the prophylaxis and/or treatment of psychiatric, neurodegenerative diseases. Compounds of formula I wherein X is CH2, CH2CH2, CH(CH=CH2), etc.; R1 is H, Me, Et, etc.; R2 is substituted Ph, substituted cyclohexyl, substituted pyridyl, etc. and enantiomers, stereoisomeric forms, mixtures of enantiomers, anomers, deoxyforms, diastereomers, mixtures of diastereomers, prodrugs, tautomers, hydrates, solvates and racemates of the above mentioned compounds, are claimed. Example compound II was prepared by alkylation of benzyl 2-oxo-3,9-diazabicyclo[3.3.1]nonane-9-carboxylate with 4-(2-bromoethoxy)-1,2-dimethoxybenzene; the resulting benzyl 3-(2-(3,4-dimethoxyphenoxy)ethyl)-2-oxo-3,9-diazabicyclo[3.3.1]nonane-9-carboxylate underwent Cbz-deprotection followed by sulfonylation with 3,5-dichlorobenzene sulfonyl chloride. From the assay, it was determined that example II exhibited IC50 value of 12.2±3.7 μM, 8.8±1.1 μM and 0.14±0.01 μM towards FKBP52, FKBP51 and FKBP12, resp. The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).Electric Literature of 97483-79-9

The Article related to bicyclic aza amide preparation fkbp inhibitor psychiatric neurol disease, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Electric Literature of 97483-79-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 30, 2014, Wang, Yansong; Hausch, Felix published a patent.Reference of Ethyl 6-cyanopicolinate The title of the patent was Preparation of bicyclic aza-amides for treatment of psychiatric disorders. And the patent contained the following:

The invention relates to bicyclic aza-amides of formula I as inhibitors of FK506 binding proteins (FKBP) useful in the prophylaxis and/or treatment of psychiatric, neurodegenerative diseases. Compounds of formula I wherein X is CH2, CH2CH2, CH(CH=CH2), etc.; R1 is H, Me, Et, etc.; R2 is substituted Ph, substituted cyclohexyl, substituted pyridyl, etc. and enantiomers, stereoisomeric forms, mixtures of enantiomers, anomers, deoxyforms, diastereomers, mixtures of diastereomers, prodrugs, tautomers, hydrates, solvates and racemates of the above mentioned compounds, are claimed. Example compound II was prepared by alkylation of benzyl 2-oxo-3,9-diazabicyclo[3.3.1]nonane-9-carboxylate with 4-(2-bromoethoxy)-1,2-dimethoxybenzene; the resulting benzyl 3-(2-(3,4-dimethoxyphenoxy)ethyl)-2-oxo-3,9-diazabicyclo[3.3.1]nonane-9-carboxylate underwent Cbz-deprotection followed by sulfonylation with 3,5-dichlorobenzene sulfonyl chloride. The invention compounds were evaluated for their FKBP binding affinity in which II inhibited FKBP51 and FKBP52 with an IC50 of 1.3±0.13 μM and 2.5±0.38 μM, resp. From the assay, it was determined that example II exhibited IC50 value of 12.2±3.7 μM, 8.8±1.1 μM and 0.14±0.01 μM towards FKBP52, FKBP51 and FKBP12, resp. The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).Reference of Ethyl 6-cyanopicolinate

The Article related to bicyclic aza amide preparation fkbp inhibitor psychiatric neurol disease, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Reference of Ethyl 6-cyanopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem