224453-17-2Relevant articles and documents
A Novel Synthesis of Cyclopenta[c]pyridazines and 1,8-Ethanophthalazinones: A New Ring System
Elassar, Abdel-Zaher Abdel Aziz
, p. 580 - 595 (2007/10/03)
Cyclopentylidene derivatives 1a,b readily couple with aryl diazonium salts to give the cyclopenta[c]pyridazine derivatives 3a-d. Compounds 3a,b reacted with arylidenemalononitrile or active methylene nitrile derivatives to give 1,8-ethanophthalazinone 6a-f, 13 and 15. Cyclopenta[c]pyridazines 3a,b reacted with ethyl acetoacetate or acetylacetone to afford the ethyl butanoate or pentanone derivatives 16a,b, respectively.
