19363-97-4

Basic information

• Product Name: Pyrazolo[1,5-a]pyridine, 3-nitro-
• Synonyms: 3-Nitropyrazolo(1,5-a)pyridin;3-nitro-pyrazolo[1,5-a]pyridine;3-Nitro-pyrazolo(1,5-a)pyridin;3-Nitropyrazolo(2,3-a)pyridine;3-nitropyrazolo[1,5-a]pyridine
• CAS NO: 19363-97-4
• Molecular Formula: C7H5N3O2
• Molecular Weight: 163.13300
• Mol File: 19363-97-4.mol

Chemical Properties

• CAS DataBase Reference: Pyrazolo[1,5-a]pyridine, 3-nitro-(CAS DataBase Reference)
• NIST Chemistry Reference: Pyrazolo[1,5-a]pyridine, 3-nitro-(19363-97-4)
• EPA Substance Registry System: Pyrazolo[1,5-a]pyridine, 3-nitro-(19363-97-4)

Safety Data

• Hazardous Substances Data: 19363-97-4(Hazardous Substances Data)

Upstream product

• 16205-44-0 Pyrazolo<1,5-a>pyridin-3-carbonsaeureethylester 
• 45458-31-9 N-Aminopyridinium 
• 20429-42-9 2-(tert-butyl)-1-nitroethene 
• 66193-70-2 1-aminopyridinium bromide 
• 274-56-6 3-azaindolizine 
• 101933-27-1 (E)-β-phenylthionitroethylene 

Downstream Products

• 605672-64-8 7-{[4-(Benzyloxy)pyridin-2-yl]oxy}-N,N-diethylpyrazolo[1,5-a]pyridin-3-amine 
• 605672-41-1 7-(2,4,6-Trimethylphenyl)-N,N,2-triethylpyrazolo[1,5-a]pyridin-3-amine 
• 605672-33-1 7-(2,4-dichlorophenyl)-N,N-diethylpyrazolo[1,5-a]pyridin-3-amine 

Relevant articles and documents

Pyrido[1',2':1,5]pyrazolo[4,3-b]quinolines as New Fluorescent Heterocyclic Systems for Dye-Sensitized Solar Cells

Abstract: New fluorescent heterocyclic compounds pyrido[1',2':1,5]pyrazolo[4,3-b]quinolines have been synthesized by the reaction of 3-nitropyrazolo[1,5-a]pyridine with different arylacetonitriles in high yield. Structural assignments of the new compounds

Synthesis, characterization, optical properties, computational characterizations, QTAIM analysis and cyclic voltammetry of new organic dyes for dye-sensitized solar cells

In recent years, dye-sensitized solar cells (DSSCs) have regarded as potential solar cells for the next generation of photovoltaic technologies. Many organic compounds are explored and used in DSSCs to produce low-cost devices and improve the cell efficiency. In this work, three new heterocyclic purple dyes are synthesized from the reaction of 3-nitropyrazolo[1,5-a]pyridine with various arylacetonitriles for dye-sensitized solar cells (DSSCs), exhibiting high molar extinction coefficients and a broad absorption range led to the good photovoltaic performance of 6.95–7.18%. Physical spectral, analytical data and optical properties are established the structures of the new dyes. The optimized geometries and relevant frontier orbitals of the dyes are obtained by density functional theory (DFT) at the level of B3LYP/6-311 + G(d,p). Electrostatic potential maps and electron density maps of the dyes were also obtained by atoms in molecules (AIM) analysis. Cyclic voltammetry measurement was performed to evaluate the electrochemical properties of the dyes and reversible oxidation waves were observed for them.

Copper-mediated oxidative [3 + 2]-annulation of nitroalkenes and pyridinium imines: Efficient synthesis of 3-fluoro- A nd 3-nitro-pyrazolo[1,5-: A] pyridines

An efficient route to pyrazolo[1,5-a]pyridines by Cu(OAc)2-promoted oxidative [3 + 2]-annulation of nitroalkenes with in situ generated pyridinium imines is developed. The reaction with α-fluoronitroalkenes enables the first preparative synthesis of 3-fluoro-pyrazolo[1,5-a]pyridines. Cycloaddition with α-unsubstituted nitroalkenes provides access to 3-nitro-pyrazolo[1,5-a]pyridines in excellent yields. A broad transformation scope was demonstrated. Both electron-rich and electron-deficient nitroalkenes as well as different aminopyridinium salts can be used for the assembly of the target pyrazolo[1,5-a]pyridines. The related aza-heterocycles, namely, pyrazolo[1,5-a]pyrazines and pyrazolo[1,5-b]pyridazines, were successfully prepared via the present methodology. The possible mechanism of the reaction is discussed.

[5,6]HETEROCYCLIC COMPOUND

Abstract: An object of the present invention is to provide a novel low molecular weight compound exhibiting an osteogenesis-promoting action. This object is achieved by a compound having the general formula (I) or a pharmacologically acceptable salt thereof. In the general formula (I), R1 and R2 represent hydrogen atoms, and the like; R3 represents a hydrogen atom, and the like; X, Y, and Z represent nitrogen atoms, and the like; A represents a phenylene group, and the like; n represents 1 or 2, and the like; and V and W represent oxygen atoms, and the like.

Novel pyrazolo[1,5-a]pyridine derivatives and their use as neurotransmitter modulators

The present invention relates to novel pyrazolo[1,5-a]pyridine derivatives of general formula I: that bind with high affifnity to CRF1 receptors, including human CRF1 receptors. This invention also relates to methods of using the com

NITROOLEFINS. I. A NEW AND CONVENIENT ACCESS TO INDOLIZINES AND PYRAZOLOPYRIDINES USING 1-NITRO-2-(PHENYLTHIO>ETHYLENE

1-Nitro-2-(phenylthio)ethylene (1) reacts with a variety of N-ylides and N-imines (pyridinium, isoquinolinium, quinolinium, phthalazinium N-ylides and N-imines) in the presence of triethylamine to give the corresponding fused pyrrole and pyrazole derivatives (indolizines, pyrroloisoquinoline, pyrrolophthalazine, pyrazolopyridine, pyrazoloquinoline, and pyrazoloisoquinoline) along with the corresponding 1-nitropyrrolopyridines and 1-nitropyrazolopyridines, respectively, in moderate yields.