Tag: M.W=150-200

Cameron, Alan John published the artcileMetal-pyridine-2-carboxaldehyde 2-pyridylhydrazone complexes as visual acid-base indicators. I. Indicator constants, color changes, and titrations, Formula: C11H10N4, the publication is Analytica Chimica Acta (1970), 51(2), 249-56, database is CAplus.

The pyridine-2-carboxaldehyde 2-pyridylhydrazone complexes of certain metals are suggested as acid-base indicators. The color change intervals of aqueous solutions of the complexes of Cu(II), Fe(II), Ni(II), Zn(II), and Cd(II) have been studied. Apparent indicator constants have been determined The performance of the indicators in titrns of weak and strong acids and bases is excellent.

Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Formula: C11H10N4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Cameron, Alan John published the artcileMetal-pyridine-2-carboxaldehyde 2-pyridylhydrazone complexes as visual acid-base indicators. II. Extractive end point titrations and pH of extraction, Product Details of C11H10N4, the publication is Analytica Chimica Acta (1970), 51(2), 257-63, database is CAplus.

The pyridine-2-carboxaldehyde 2-pyridylhydrazone complexes of Cu(II), Fe(II), and Ni(II) are very good indicators for extractive end points in acid-base titrations The pH ranges for extraction of the complexes have been established, and their relevance to the extractive end points is discussed.

Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Product Details of C11H10N4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Volpi, G. published the artcileFluorescent trifluoromethylated imidazo[1,5-a]pyridines and their application in luminescent down-shifting conversion, Category: pyridine-derivatives, the publication is Journal of Luminescence (2022), 118529, database is CAplus.

In the last few years, imidazo[1,5-a]pyridine derivatives have attracted growing attention due to their unique optical behaviors. Herein, a series of trifluoromethylated substituted imidazo[1,5-a]pyridine derivatives were synthesized and their optical properties investigated. Depending on the position of the trifluoromethylated substituents on the imidazo[1,5-a]pyridine nucleus, we were able to tune the quantum yields (Φ) both in acetonitrile solution (from 13% to 39%) and in the polymeric matrix (10%-58%) with a remarkable large Stokes shift. The investigated fluorophores were dispersed in a transparent polyurethane resin, providing a possible luminescent low-cost material for down-shifting conversion. An anal. based on the chem. structures and spectroscopic data, both in solution and polymeric medium, is reported to address the best strategies to optimize the photophys. properties and prevent aggregation. Finally, optimized polyurethane-based films prepared with compounds 2 and 3 were tested as a luminescent coating on a com. photodiode, enabling their technol. application.

Journal of Luminescence published new progress about 91-02-1. 91-02-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene,Ketone, name is Phenyl(pyridin-2-yl)methanone, and the molecular formula is C12H20O6, Category: pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Perez-Gomez, Marta published the artcileTrapping σ-Alkyl-Palladium(II) Intermediates with Arynes Encompassing Intramolecular C-H Activation: Spirobiaryls through Pd-Catalyzed Cascade Reactions, Formula: C5H5BrN2, the publication is Angewandte Chemie, International Edition (2016), 55(46), 14389-14393, database is CAplus and MEDLINE.

A palladium-catalyzed cascade reaction based on the trapping of transient alkyl-Pd^II intermediates with arynes encompassing a C-H activation step has been developed. This synthetic pathway gives rise to hetero-spirocyclic scaffolds containing a biaryl motif, and opens up new synthetic strategies in the design of cascade reactions since it gathers several aspects of Pd chem., i.e., intra- and intermol. carbopalladation of unsaturated species, C-H activation and C-C coupling processes.

Angewandte Chemie, International Edition published new progress about 39856-58-1. 39856-58-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Bromide,Amine, name is 2-Bromopyridin-3-amine, and the molecular formula is C5H5BrN2, Formula: C5H5BrN2.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Grases, F. published the artcile2,2′-Dipyridyl ketone hydrazone as photometric reagent. Critical study of colorimetric and fluorimetric reaction ability of hydrazones, azines and phenylhydrazones of various ketones, Product Details of C11H10N4, the publication is Afinidad (1982), 39(377), 30-2, database is CAplus.

2,2′-Dipyridyl ketone hydrazone in EtOH reacts with Pd(II) to form a complex with absorption peak at 500 nm. The development of the color takes 30 min and is then stable for at least 2 h. Optimum conditions are pH 13.4 and 80% EtOH solvent. Beer’s law is followed for 0.5-4.0 ppm Pd. Tolerance levels for 21 ions are given. The colorimetric and fluorometric reactions of hydrazones, azine, and phenylhydrazones of various ketones are briefly reviewed.

Afinidad published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Product Details of C11H10N4.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Grases, F. published the artcileFluorimetric determination of copper and mercury based on their catalytic effects on the autoxidation of 2,2′-dipyridylketone hydrazone, Name: 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, the publication is Analytica Chimica Acta (1980), 119(2), 359-65, database is CAplus.

Fluorometric methods for the determination of Hg(II) (80-320 ppb) and Cu(II) (0.4-1 ppb) are described. These ions catalyze the autoxidation of 2,2′-dipyridyl ketone hydrazone, which yields a product exhibiting an intense blue fluorescence in acidic solution This product was investigated and the exptl. variables and interferences in each determination were studied.

Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Name: 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Grases, F. published the artcileSpectrofluorometric kinetic determination of copper based on the autoxidation of 2,2′-dipyridyl ketone azine or hydrazone or phenyl-2-pyridyl ketone hydrazone, SDS of cas: 2215-33-0, the publication is Analytica Chimica Acta (1981), 21-8, database is CAplus.

Kinetic methods for determination of ppm levels of Cu are based on its catalytic effect on the autoxidation of the hydrazone and the azine of 2,2′-dipyridyl ketone and the hydrazone of phenyl-2-pyridyl ketone. The reactions are followed by measuring the rate of appearance of fluorescence. The methods suffer very few interferences.

Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, SDS of cas: 2215-33-0.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Grases, F. published the artcileA simple monitored thermometric determination of copper(II) by reaction-rate measurement based on the catalysis of the aerial oxidation of 2,2′-dipyridylketone hydrazone, SDS of cas: 2215-33-0, the publication is Analytica Chimica Acta (1984), 158(2), 389-93, database is CAplus.

The initial rate of oxidation of 2,2′-dipyridylketone hydrazone was measured by monitoring the rate of increase of temperature of the solution with a thermistor. Cu 0.2-2 mg/L was determined in the final solution with very few interferences.

Analytica Chimica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, SDS of cas: 2215-33-0.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Sadig, Jessie E. R. published the artcilePalladium-Catalyzed Synthesis of Benzimidazoles and Quinazolinones from Common Precursors, Category: pyridine-derivatives, the publication is Journal of Organic Chemistry (2012), 77(21), 9473-9486, database is CAplus and MEDLINE.

N-(o-Halophenyl)imidoyl chlorides and the corresponding imidates are easily prepared and can be utilized as complementary precursors for the synthesis of important heterocycles. The synthesis of N-substituted benzimidazoles was possible from the palladium-catalyzed reaction of both classes of substrate with a variety of N-nucleophiles. The use of the imidate precursor for the synthesis of N-substituted quinazolinones by incorporation of a palladium-catalyzed aminocarbonylation reaction has also been demonstrated. Both processes tolerate a wide range of functional groups.

Journal of Organic Chemistry published new progress about 39856-58-1. 39856-58-1 belongs to pyridine-derivatives, auxiliary class Pyridine,Bromide,Amine, name is 2-Bromopyridin-3-amine, and the molecular formula is C5H5BrN2, Category: pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Nicolaus, Norman published the artcileModular Synthesis of Naphthothiophenes by Pd-Catalyzed Tandem Direct Arylation/Suzuki Coupling, Synthetic Route of 612845-44-0, the publication is Organic Letters (2011), 13(16), 4236-4239, database is CAplus and MEDLINE.

A short and highly modular three-step synthesis of a new class of substituted naphthothiophenes has been developed exploiting a Pd-catalyzed tandem direct arylation/Suzuki coupling transformation of 3-[2-(2,2-dibromovinyl)phenyl]thiophenes as the key step.

Organic Letters published new progress about 612845-44-0. 612845-44-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Boronic acid and ester,Ether,Boronic Acids,Boronic acid and ester, name is (6-Ethoxypyridin-3-yl)boronic acid, and the molecular formula is C7H10BNO3, Synthetic Route of 612845-44-0.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem