[4+2]-CYCLOADDITION AND [2+4]-CYCLOADDITION PROCESSES OF 4,5-DICYANOPYRIDAZINE WITH 2,3-DIMETHYLBUTA-1,3-DIENE

The title compounds afforded under relatively mild conditions the polycyclic systems 3a, 4, and 5 through alternative concomitant cycloadditions; the reactivity of the dicyanopyridazine system was critically influenced by the presence of methyl groups at the 3 and 6 positions. The skeleton of 3a and...

Full description

Saved in:
Bibliographic Details
Published inTetrahedron Vol. 50; no. 30; pp. 9189 - 9194
Main Authors NESI, R, GIOMI, D, TURCHI, S, PAOLI, P
Format Journal Article
LanguageEnglish
Published OXFORD Elsevier 25.07.1994
Subjects
Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
CYCLOADDITION
DIELS-ALDER REACTIONS
PYRIDAZINES
Online AccessGet full text

Cover

More Information
Summary:The title compounds afforded under relatively mild conditions the polycyclic systems 3a, 4, and 5 through alternative concomitant cycloadditions; the reactivity of the dicyanopyridazine system was critically influenced by the presence of methyl groups at the 3 and 6 positions. The skeleton of 3a and the stereochemistry of 5 were established by X-ray experiments.
ISSN:0040-4020
DOI:10.1016/S0040-4020(01)85385-0