Synthesis of novel functionally substituted pyridazines and oxazines
摘要:
Acetone 1,3-di(phenylhydrazone) reacts with arylidenemalononitriles in the presence of piperidine to give the coressponding 3,3'-carbonylbispyridazine derivatives. Under the same reaction conditions dioxime reacts with arylidenemalononitriles to give the corresponding 3,3'-carbonylbis-1,2-oxazines. Dioxime reacts with primary aromatic amines and formalin in a molar ratio of 1: 1: 2 to give 1-arylidene-3,5-dihydroxyimino-piperidine-4-ones.