98669-81-9

Upstream product

• 87885-76-5 1-(p-chlorobenzoyl)-5-(p-chlorobenzoylazo)-3,4,4,5-tetramethyl-2-pyrazoline 
• 87885-65-2 1-(4-chlorobenzoyl)-4,5-dihydro-5-hydroxy-3,4,4,5-tetramethyl-1H-pyrazole 

Downstream Products

• 98669-92-2 6-(4-chlorobenzoyl)-3-(4-methylphenyl)-8,9,9-trimethyltriazaspiro<4.4>nona-2,7-diene 
• 110606-79-6 5-<2-(p-chlorobenzoylhydrazono)-1,1-dimethylpropyl>-1,3-diphenyl-1H-pyrazole 
• 110606-78-5 6-(p-chlorobenzoyl)-8,9,9-trimethyl-1,3-diphenyl-1,2,6,7-tetrazaspiro<4.4>nona-2,7-diene 
• 98669-93-3 6-(4-chlorobenzoyl)-3-(4-chlorophenyl)-8,9,9-trimethyltriazaspiro<4.4>nona-2,7-diene 
• 133610-33-0 2-(4-Chloro-benzoyl)-4,4,5-trimethyl-2,4-dihydro-pyrazol-3-one 
• 87885-65-2 1-(4-chlorobenzoyl)-4,5-dihydro-5-hydroxy-3,4,4,5-tetramethyl-1H-pyrazole 
• 110606-85-4 5-<2-(p-chlorobenzoylhydrazono)-1,1-dimethylpropyl>-1-methyl-3-phenyl-1H-pyrazole 
• 133610-38-5 Acetic acid 2-(4-chloro-benzoyl)-4,4,5-trimethyl-2,4-dihydro-pyrazol-(3E)-ylidenemethyl ester 
• 133610-43-2 Acetic acid 2-(4-chloro-benzoyl)-3-hydroxy-4,4,5-trimethyl-3,4-dihydro-2H-pyrazol-3-ylmethyl ester 
• 127519-08-8 4-Chloro-benzoic acid 1-(1-diphenylacetyl-4,4-dimethyl-5-methylene-4,5-dihydro-1H-pyrazol-3-ylmethyl)-2,2-diphenyl-vinyl ester 
• 98669-91-1 6-(4-chlorobenzoyl)-3-phenyl-8,9,9-trimethyltriazaspiro<4.4>nona-2,7-diene 

Relevant academic research and scientific papers

1,3-Dipolar Cycloadditions of Benzonitrile Oxides to 1-Aroyl-4,5-dihydro-3,4,4-trimethyl-5-methylene-1H-pyrazoles

Die 1-Aroyl-4,5-dihydro-3,4,4-trimethyl-5-methylen-1H-pyrazole 2, dargestellt durch Wasserabspaltung aus den entsprechenden 4,5-Dihydro-5-hydroxy-1H-pyrazolen 1, reagieren mit aromatischen Nitriloxiden unter 1,3-dipolarer Cycloaddition zu den neuen Spirov

Oxidation of Bis-aroylhydrazones of 3,3-Dimethylpentane-2,4-dione and Thermal Decomposition of the Oxidation Products (1)

Oxidation of the title bis-aroylhydrazones 2 with lead tetraacetate gives 1-aroyl-5-aroylazo-3,4,4,5-tetramethyl-2-pyrazolines 6 in good yields.The aroylazopyrazolines 6 decompouse by refluxing in chloroform of ethanol solution to 1-aroyl-5-hydroxy-3,4,4,5-tetramethyl-2-pyrazolines 3, 1-aroyl-5-methylene-3,4,4-trimethyl-2-pyrazoles 10 and 1-aroyl-3,4,4,5-tetramethyl-2-pyrazolines 11.The spectral data of the, prepared compounds, as well as the reaction mechanisms are discussed.