Pyridazines, LVII: Synthesis and cyclocondensation reactions of (2-aminophenyl)-(4-pyridazinyl)-ketone, a new diaza isoster of 2-aminobenzophenone

Article abstract of DOI:10.1002/ardp.19923250212

A convenient approach to the new 2-aminobenzophenone analogue 4 is reported. Condensation reactions of 4 with ortho esters or amide acetals, respectively, followed by intramolecular cyclisations were found to provide smooth access to (4-pyridazinyl)-subst