121582-72-7

Upstream product

• 106-47-8 4-chloro-aniline 
• 82697-69-6 dimethyl 1-(4-chlorophenyl)hydrazono-2-oxopropane-1,3-dicarboxylate 
• 121582-56-7 methyl 2-(4-chlorophenyl)-5-hydroxy-3-oxo-2,3-dihydropyridazine-6-carboxylate 
• 121582-65-8 2-(4-chlorophenyl)-5-hydroxy-3-oxo-2,3-dihydro-pyridazine-6-carboxylic acid 

Downstream Products

• 129109-20-2 5-Chloro-2-(4-chloro-phenyl)-2H-pyridazin-3-one 
• 129109-58-6 2-(4-Chlorophenyl)-5-hydroxy-4-iodo-2,3-dihydropyridazine-3(2H)-one 
• 84956-67-2 1-(4-chlorophenyl)-4-amino-1,6-dihydro-6-oxopyridazine 
• 129109-47-3 2-(4-Chlorophenyl)-5-triphenylphosphoranylideneiminopyridazin-3(2H)-one 
• 129109-25-7 5-Azido-2-(4-chloro-phenyl)-2H-pyridazin-3-one 

Relevant academic research and scientific papers

Pyridazines with Heteroatom Substituents in Position 3 and 5. 3) 2-Aryl-5-hydroxypyridazin-3(2H)-ones as Potential Herbicides: Synthesis and Some Reactions

The coupling of dimethyl acetonedicarboxylate 1 with a variety of aryldiazonium salts 2a-i produces the hydrazones 3a-i which can be cyclized in boiling dichlorobenzene to yield the pyridazone esters 4a-i, or in sodium hydroxide solution to give the pyrid