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Synlett 1997; 1997(12): 1361-1362
DOI: 10.1055/s-1997-1042
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Novel and Convenient Synthesis of 1,4-Dihydropyridazines and Pyridazines from Aminocarbonylazoalkenes

Orazio A. Attanasi1 , Paolino Filippone2 , Chiara Fiorucci, Fabio Mantellini
  • 1Istituto di Chimica Organica della Facoltà di Scienze, Università di Urbino, Piazza della Repubblica 13, 61029 Urbino, Italy, Fax +39.722.2907; E-mail attanasi@fis.uniurb.it
  • 2Istituto di Chimica Organica della Facoltà di Scienze, Università di Urbino, Piazza della Repubblica 13, 61029 Urbino, Italy, Fax +39.722.2907
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Publication Date:
31 December 2000 (online)

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1-Unsubstituted 1,4-dihydropyridazines have been obtained in good to excellent yields by reaction of aminocarbonylazoalkenes with β-tricarbonyl compounds under mild conditions. Treatment at room temperature of 1-unsubstituted 1,4-dihydropyridazines with phenyltrimethylammonium tribromide directly afforded the relevant pyridazine derivatives in high yield.

1,4-dihydropyridazines - pyridazines - aminocarbonylazoalkenes - β-tricarbonyl compounds