118487-31-3

Upstream product

• 119-26-6 (2,4-dinitro-phenyl)-hydrazine 
• 3142-58-3 3,3-dimethyl-2,4-pentanedione 
• 118487-27-7 3,3-dimethylpentane-2,4-dione mono-(2,4-dinitrophenylhydrazone) 

Downstream Products

• 118487-34-6 N-(2,4-Dinitro-phenyl)-N'-[2-(2,4-dinitro-phenyl)-3,4,4,5-tetramethyl-3,4-dihydro-2H-pyrazol-3-yl]-hydrazine 
• 118487-32-4 2-(2,4-Dinitro-phenyl)-3,4,4,5-tetramethyl-3,4-dihydro-2H-pyrazol-3-ol 

Relevant academic research and scientific papers

REACTION OF 3,3-DIMETHYL-2,4-PENTANEDIONE WITH ALKYL- AND ARYLHYDRAZINES

Depending on the conditions and on the substituent, the reaction of 3,3-dimethyl-1,4-pentanedione with alkyl- and arylhydrazines can be used for the synthesis of the corresponding mono- and bishydrazones and also substituted 5-hydroxy-, 5-hydrazino-, or 5-methylene-2-pyrazolines.The addition of trifluoroacetic acid, water, hydrazines, and amines to the latter was studied.For the "unsymmetrical" products from addition of the hydrazines to the substituted 5-methylene-2-pyrazolines an equilibrium or mutual transition between the two 5-hydrazino-2-pyrazoline forms is observed.