84752-10-3

Upstream product

• 4860-93-9 3-phenyl-1H-pyrazol-5-one 

Downstream Products

• 84752-14-7 methyl 7-oxo-4-phenyl-6H-pyrazolo<1,5-d><1,2,4>triazin-2-carboxylate 
• 84752-15-8 methyl 7-oxo-6-methyl-2,4-diphenyl-6H-pyrazolo<1,5-d><1,2,4>triazin-3-carboxylate 
• 84752-12-5 dimethyl 6-methyl-7-oxo-4-phenyl-6H-pyrazolo<1,5-d><1,2,4>triazine-2,3-dicarboxylate 
• 84752-17-0 methyl spiro<1-methyl-3-phenylpyrazolin-5-one-4,1'-cyclopropane>-2'-carboxylate 
• 82937-05-1 methyl 7-oxo-6-methyl-4-phenyl-6H-pyrazolo<1,5-d><1,2,4>triazine-2-carboxylate 
• 82937-04-0 4-diazo-1-methyl-3-phenyl-2-pyrazolin-5-one 
• 84752-11-4 dimethyl 7-oxo-4-phenyl-6H-pyrazolo<1,5-d><1,2,4>triazine-2,3-dicarboxylate 

Relevant academic research and scientific papers

Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones

Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates.A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296

1,3-Dipolar Cycloaddition Reactions of Diazopyrazolinones with Electron-Deficient Dipolarophiles

A study of the reactivity of a series of 4-diazopyrazolin-5-ones toward dipolar cycloaddition with electron-deficient olefinic and acetylenic dipolarophiles has been carried out.Reactions with dimethyl acetylenedicarboxylate afford pyrazolotriazin-7-ones which result from dipolar cycloaddition followed by a van Alphen-Huttel rearrangement of the initially produced spiro 3H-pyrazole adducts.Reaction with unsymmetrical acetylenic esters afforded variable mixtures of regioisomeric pyrazolotriazinones and 1H-furopyrazoles.Product formation has been rationalized in terms of a sustituent-dependent partitioning between spiro 3H-pyrazole adducts and ring-opened diazoalkanes.Spirocarboxylate esters were the only products isolated from reactions with acrylate ester.