2057-87-6

Basic information

• Product Name: 1-cyclopentylidene-2-(2,4-dinitrophenyl)hydrazine
• Synonyms: Cyclopentanone 2,4-dinitrophenylhydrazone
• CAS NO: 2057-87-6
• Molecular Formula: C₁₁H₁₂N₄O₄
• Molecular Weight: 264.2374
• Mol File: 2057-87-6.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 422.6°C at 760 mmHg
• Flash Point: 209.4°C
• Density: 1.52g/cm³
• Vapor Pressure: 2.38E-07mmHg at 25°C
• Refractive Index: 1.683
• CAS DataBase Reference: 1-cyclopentylidene-2-(2,4-dinitrophenyl)hydrazine(CAS DataBase Reference)
• NIST Chemistry Reference: 1-cyclopentylidene-2-(2,4-dinitrophenyl)hydrazine(2057-87-6)
• EPA Substance Registry System: 1-cyclopentylidene-2-(2,4-dinitrophenyl)hydrazine(2057-87-6)

Safety Data

• Hazardous Substances Data: 2057-87-6(Hazardous Substances Data)

Usage

Chemical structure

Contains a cyclopentylidene ring and a dinitrophenyl group

Type of compound

Hydrazine derivative

Potential applications

a. Pharmaceuticals
b. Organic synthesis as a reagent
c. Chemistry
d. Medicine
e. Material science

Unique properties

Due to its chemical structure

Health and environmental risks

Must be handled with care to avoid mishandling

Safety precautions

Importance of proper handling to minimize risks

Upstream product

• 872-53-7 cyclopentanealdehyde 
• 119-26-6 (2,4-dinitro-phenyl)-hydrazine 
• 97-00-7 1-chloro-2,4-dinitro-benzene 
• 57260-90-9 Cyclopentanon-dimethylmercaptal-S-oxid 
• 164669-36-7 5-bromo-5-tributylstannyl-1-(methyldiphenylsilyl)-1-pentanone 
• 164669-34-5 5-bromo-1-(t-butyl-dimethyl-silyl)-5-tributyl-stannyl-1-pentanone 
• 164669-33-4 5-bromo-5-tributyl-stannyl-1-trimethyl-silyl-1-pentanone 
• 120-92-3 cyclopentanone 

Downstream Products

• 1233237-79-0 C₁₃H₁₄N₄O₅S 
• 120-92-3 cyclopentanone 

Relevant articles and documents

Oxidative Dehomologation of Aldehydes with Oxygen as a Terminal Oxidant

A mild, efficient protocol for oxidative cleavage of C-C bonds in aldehydes has been developed that employs alkali metal hydrides as reagents and oxygen from air as a terminal oxidant. The method is applicable to a broad substrate range.

Efficient solvent-free synthesis of thiazolidin-4-ones from phenylhydrazine and 2,4-dinitrophenylhydrazine

An efficient solvent-free synthesis of thiazolidinones from reaction of mercaptoacetic acid, aldehydes (benzaldehyde and valeraldehyde) or ketones (cyclopentanone and cyclohexanone), and hydrazines (phenylhydrazine and 2,4-dinitrophenylhydrazine) is reported. The compounds were generally characterized by spectroscopic techniques and specifically for 2-cyclohexanyl-3-(N-phenyl)-1,3-thiazolidin-4-one by X-ray crystallography.

The application of intramolecular radical cyclizations of acylsilanes in the regiospecific formation of cyclic silyl enol ethers

Acylsilanes with terminal α-stannyl bromide or xanthate functionalities are prepared, α-Stannyl radicals generated from these acylsilanes undergo intramolecular cyclizations to give cyclic silyl enol ethers regiospecifically. The radical processes involve radical cyclization, Brook rearrangement, and β-fragmentation in sequence. A tributylstannyl group serves as the radical leaving group. The newly formed σ-bond and π-bond are located between the same two carbon atoms. This approach is limited to the formation of five-membered rings. In another route, ω-bromo-α-phenylsulfonylacylsilanes are synthesized. The radical cyclizations of these α-sulfonylacylsilanes also give cyclic silyl enol ethers. The phenylsulfonyl moiety is the radical leaving group in this system. Furthermore, the newly formed σ-bond and π-bond are located at adjacent positions sharing a single carbon atom. The latter approach is effective for both five- and six-membered ring formation.