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Paper | Regular issue | Vol 43, No. 9, 1996, pp.1967-1979
Published online, 1st January, 1970
DOI: 10.3987/COM-96-7535
Synthesis of New Pyridazino Anellated Heterocycles via Inverse-Electron-Demand Diels-Alder Reactions on Cyclic Ketene-S,N-acetals

Susanne Pippich and Herbert Bartsch*

*Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse14, A-1090 Vienna, Austria

Abstract

Bicyclic ketene-S,N-acetals were synthesized and their reactivity as electron-rich dienophiles was investigated employing electron-deficient azadienes. A series of new condensed pyridazines was obtained.