77644-26-9

Upstream product

• 62567-30-0 1-acetylamino-3-phenyl-pyridazinium betaine 
• 70014-99-2 1-((1aS,6aR)-1,1,1a,6a-Tetrachloro-4-phenyl-1,1a,1b,6a-tetrahydro-5,5a,6-triaza-cyclopropa[a]inden-6-yl)-ethanone 

Downstream Products

• 77644-31-6 2-Chloro-6-phenyl-pyrazolo[1,5-b]pyridazine 
• 77644-28-1 2-Chloro-6-phenyl-pyrazolo[1,5-b]pyridazine-3-carbaldehyde 

Relevant academic research and scientific papers

1,3-Dipolar Cycloaddition of Pyridazinium Ylides with Perhalocycloalkenes and Thermal Decomposition of the Adducts

Some pyridazinium N-ylides underwent 1,3-dipolar cycloaddition with perhalocyclopropenes and with a perhalocyclobutene.Thermal decomposition and chemical transformations of the pyrolyzed products afforded various hitherto unknown 2-chloropyrazolopyridazine derivatives.Keywords - pyridazinium N-ylide; pyridazine N-acylimine; N-acyliminopyridazine; 1,3-dipolar cycyloaddition; thermal ring-opening; diazaindolizine; pyrazolopyridazine; 2-chloropyrazolopyridazine.

THERMAL DECOMPOSITION OF 1,3-DIPOLAR CYCLOADDUCTS OF PYRIDAZINE N-ACETYLIMINES AND TETRACHLOROCYCLOPROPENE

Thermolysis of 6-acetyl-4b,5,5,5a-tetrachloro-4a,4b,5a,6-tetrahydro-5H-cyclopropapyrazolopyridazines afforded 2-chloro-3-(dichloromethyl)pyrazolopyridazines which were converted to various types of pyrazolopyridazines.