99853-01-7

Upstream product

• 100125-77-7 4-(4-bromo-phenylhydrazono)-valeric acid 
• 123-91-1 1,4-dioxane 
• 7647-01-0 hydrogenchloride 
• 6089-09-4 4-pentynoic acid 
• 589-21-9 (4-bromophenyl)hydrazine 

Relevant academic research and scientific papers

First synthesis of 4,5-dihydro-3(2H)-pyridazinones via Zn-mediated hydrohydrazination

The hydrohydrazination of 4-pentynoic acid with different arylhydrazines proceeds smoothly in the presence of zinc chloride. The domino amination-amidation sequence leads to aryl-substituted 4,5-dihydro-3(2H)-pyridazinones.