103748-75-0

Basic information

• Product Name: 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propyl]-1,2-dihydro-indazol-3-one
• Synonyms: 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propyl]-1,2-dihydro-indazol-3-one
• CAS NO: 103748-75-0
• Molecular Weight: 450.477
• Mol File: 103748-75-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propyl]-1,2-dihydro-indazol-3-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propyl]-1,2-dihydro-indazol-3-one(103748-75-0)
• EPA Substance Registry System: 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propyl]-1,2-dihydro-indazol-3-one(103748-75-0)

Safety Data

• Hazardous Substances Data: 103748-75-0(Hazardous Substances Data)

Upstream product

• 101246-35-9 2-[2-Oxo-1-(triphenyl-λ⁵-phosphanylidene)-propylazo]-benzaldehyde 

Downstream Products

• 80056-23-1 2-formyl-4,5-methylenedioxy-phenylazo(methoxycarbonyl)methylenetriphenylphosphorane 
• 103748-71-6 2-formyl-phenylazo(phenylsulphonyl)methylenetriphenylphosphorane 
• 17244-28-9 2-acetyl-4-oxo-dihydroquinazoline 
• 603-35-0 triphenylphosphine 

Relevant articles and documents

o.FORMYLARYLAZOMETHYLENETRIPHENYLPHOSPHORANES: A FACILE THERMALLY PROMOTED REARRANGEMENT TO 3-OXO-INDAZOLINE AND 4-OXO-DIHYDROQUINAZOLINE DERIVATIVES

The o.formylarylazomethylenetriphenylphosphoranes carrying an electron withdrawing group on the ylidic carbon undergo thermal intramolecular cyclization to 3-oxo-indazolin-2-yl-methylenephosphorane derivatives.The latter compounds, and their 1-alkyl derivatives, in turn, undergo thermal and/or acid catalyzed rearrangement to 4-oxo-1,4-dihydroquinazoline derivatives and PPh3.Some possible reaction mechanisms are discussed, and some synthetic applications of the above reactions are shown.