Betaine als Zwischenprodukte der Umlagerung eines Spiro-oxirans in ein Dioxolen / Betaines as Intermediates in the Rearrangement of a Spiro-oxiran into a Dioxolen
Open Access
- 1 April 1978
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 33 (4) , 429-432
- https://doi.org/10.1515/znb-1978-0417
Abstract
Aliphatic, cycloaliphatic and heteroaromatic tert. Amines react with 2,4-dioxo-1-phenyl-1,2,3,4-tetrahydroquinoline-3-spiro-2′-oxiran (1) at 20 °C to give the betaines 2a−g, of which 2a−c are thermically rearranged to 3,4-methylendioxy-1-phenyl-1,2- dihydro-2-quinolone (3). The thermolysis of 2g yields 3-(4-dimethylamino-pyridinio)-2-oxo-1-phenyl-1,2-dihydroquinoline-4-olat (4).Keywords
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