83412-89-9

Upstream product

• 92813-92-8 o-(N-benzoylhydrazino)benzoic acid 
• 7364-25-2 3-indazolinone 
• 98-88-4 benzoyl chloride 
• 83412-86-6 C₃₂H₂₅N₂O₂P 
• 5326-27-2 2-hydrazino-benzoic acid 
• 1100-88-5 benzyltriphenylphosphonium chloride 
• 16721-45-2 triphenyl(phenylmethylene)phosphorane 
• 83412-94-6 N-(α-Chlorobenzilidene)-N'-(o-carboxyphenyl)hydrazine 
• 7384-19-2 2-Acetyl-1,2-dihydro-3H-indazol-3-one 
• 33906-30-8 2-hydrazinobenzoic acid hydrochloride 

Downstream Products

• 92060-57-6 1-benzoylindazolin-3-one 
• 16105-22-9 1-phenylsulphonyl-3-phenylsulphonyloxyindazole 

Relevant academic research and scientific papers

Acyl Derivatives of Indazolin-3-one

1- and 2-Ethanoyl-, propanoyl-, butanoyl- and benzoylindazolin-3-ones have been prepared and the 2-isomers have been shown to exist in two tautomeric forms.Sulphonylation and further acylation of these compounds are described and some rearrangements in the series are discussed.

The Reactioon of Benzylidenetriphenylphosphoranes with Benzenediazonium-2-carboxylate

The title reaction affords to the adducts 3 which upon alkaline treatment give compounds 5, while by thermolysis give 6 and 7.Hydrochloride salts of 3 in refluxing xylene afford to chlorohydrazones 10 as the major products.A mechanism is proposed for thermal decomposition of 3.