Thermal cyclisation of an alleneamidine to a dihydropyridine derivative involving a 1,5‐hydrogen shift
- 1 January 1976
- journal article
- research article
- Published by Wiley in Bulletin des Sociétés Chimiques Belges
- Vol. 85 (3) , 147-149
- https://doi.org/10.1002/bscb.19760850306
Abstract
The alleneamidins 1 has been shown to cyclise to a dihydropyridine derivative 2 by heating for a 2 hours at 220°. This reaction is assumed to proceed via a (1, 5 a)‐sigmatropic hydrogen shift followed by a 6 π‐electrocyclisation. An attempt has been made to extend this new heterocyclisation.Keywords
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