Studies with enamines and azaenamines: A novel efficient route to 6-amino-1,4-dihydropyridazines and their condensed derivatives
作者:Said A. S. Ghozlan、Ismail A. Abdelhamid、Hamdi M. Hassaneen、Mohamed H. Elnagdi
DOI:10.1002/jhet.5570440118
日期:2007.1
1-Arylhydrazonopyruvaldehydes 1 react with α,β-unsaturated nitriles 2 to yield 6-amino-1,4-dihydropyridazines 4 that are converted into pyridazinones 5 via refluxing in an acetic acid/hydrochloric acid mixture and into the ethylidenemalononitrile derivatives 6 on reflux with malononitrile in ethanolic/piperidine solution.