4232-53-5

Basic information

• Product Name: 9-oxo-1,2,3,9-tetrahydro-4H-cyclopenta[b]quinoxalin-9-ium-4-olate
• Synonyms: 1H-Cyclopenta[b]quinoxaline, 2,3-dihydro-, 4,9-dioxide; 2,3-Dihydro-1H-cyclopenta[b]quinoxaline 4,9-dioxide
• CAS NO: 4232-53-5
• Molecular Formula: C₁₁H₁₀N₂O₂
• Molecular Weight: 202.2093
• Mol File: 4232-53-5.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 9-oxo-1,2,3,9-tetrahydro-4H-cyclopenta[b]quinoxalin-9-ium-4-olate(CAS DataBase Reference)
• NIST Chemistry Reference: 9-oxo-1,2,3,9-tetrahydro-4H-cyclopenta[b]quinoxalin-9-ium-4-olate(4232-53-5)
• EPA Substance Registry System: 9-oxo-1,2,3,9-tetrahydro-4H-cyclopenta[b]quinoxalin-9-ium-4-olate(4232-53-5)

Safety Data

• Hazardous Substances Data: 4232-53-5(Hazardous Substances Data)

Upstream product

• 120-92-3 cyclopentanone 
• 480-96-6 benzofurazan oxide 
• 2835-58-7 2-aminoazobenzene 
• 7193-24-0 2,3-dihydro-1H-cyclopenta[b]quinoxaline 
• 2311-91-3 monoperoxyphthalic acid 

Relevant articles and documents

Unusual friedlander reactions: A route to novel quinoxaline-based heterocycles

Acid catalyzed Friedlander reactions of a number of 2,3-dihydro-1H- cyclopenta[b]quinoxaline-1-ones with 2-aminobenzaldehyde yield, unexpectedly, 8H-indolo[3,2-a]phenazine and quinolino[2,3-c]cyclopentadienone[2,3-b] quinoxalines, the structures of derivatives of which were confirmed by X-ray crystallography. Easy routes to novel quinoxaline-based indoles, quinolones, and quinoxaline-1,4-dioxides are reported, and proposed mechanisms for the unexpected products are discussed.

Quinoxaline derivatives

The synthesis of quinoxaline and benzimidazole-N-oxides and of ester and amide derivatives of 3-hydroxy-2-quinoxalinecarboxylic acid by a novel process consisting of the reaction between a benzofuroxan and an activated methylene-containing compound under basic conditions.