118487-29-9

Upstream product

• 52182-90-8 1,3,4,4,5-pentamethyl-4H-pyrazolium iodide 
• 100-63-0 phenylhydrazine 
• 118487-25-5 3,3-Dimethyl-4-(methyl-hydrazono)-pentan-2-one 
• 3142-58-3 3,3-dimethyl-2,4-pentanedione 
• 107590-20-5 5-methylene-3,4,4-trimethyl-1-phenyl-2-pyrazoline 
• 60-34-4 methylhydrazine 
• 118487-36-8 N-Methyl-N'-(3,4,4,5-tetramethyl-2-phenyl-3,4-dihydro-2H-pyrazol-3-yl)-hydrazine 
• 107590-17-0 3,3-dimethyl-2,4-pentanedione monophenylhydrazone 

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.