Synthese von Diaza[4.4]spirenen
Open Access
- 1 May 1969
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 24 (5) , 536-538
- https://doi.org/10.1515/znb-1969-0512
Abstract
The synthesis of substituted diaza [4.4] spirenes (3) by 1.3-dipolar addition of diazo-cyclopentadienes to alkynes is described. If the 1- or 4-position of the diazo-cyclopentadienes contains an H-atom, bicyclic pyridazine derivatives are formed with alkynes. The uv-spectra of the diaza [4.4] spirenes (3) are discussed with regard to the new term “spiroconjugation”.Keywords
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