Abstract
Reaction of the 3,6-dichloro-4-pyridazinecarboxamide derivative (2) with sodium hydride in dimethylformamide does not afford a pyridazino[3,4-b]-[1,5]benzodiazepine system (3) but results in a ring transformation to give the quinoxalinyl-substituted pyrazole derivative (4). The structure of this unexpected reaction product could be elucidated by means of a crystal structure determination; a mechanistic interpretation of this novel type of a pyridazine → pyrazole ring contraction is proposed
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
