Aus Dehydracetsäure (1), N, N‐Dimethylformamiddimethylacetal und Hydroxylamin kann in einer Zweistufenreaktion ein Pyranopyridin mit vinylogen Hydroxamsäurestrukturen dargestellt werden. Der Bruttoformel C9H8N2O4 entsprechend werden die Isomere 5a‐8b diskutiert. Die Existenz von 5a wird in Lösung mit Hilfe seiner spektralen Daten (MS, IR, NMR) nachgewiesen.
The purpose of this work is the development of a synthetic pathway that allows access to heterocyclic compounds containing the 1,5-benzodiazepines. The dehydroacetic acid has been widely studied as a starting material for the synthesis of natural products that exhibit interesting pharmacological properties. In the present work, we describe an easy and cost effective access way to new products 1,5-benzodiazepines involving a pyranic residue. All synthesized products were subjected to IR, 1H NMR and mass spectra studies.