The reactions between the ynamino ketones (I) and ethylenediamine (II), ethanolamine (IV), o‐aminophenol (VIa) and o‐aminothiophenol (VIb) yield five‐membered heterocycles with two heteroatoms, viz the derivatives (III), (V) and (VII), whereas o‐phenylenediamine (VIII) affords the diazepine derivatives (IX).
Bei der Reaktion der Titelverbindung (I) mit den prim. Aminen (IIa) nach Methode A) bzw. mit den sek. Aminen (IIb) und (IIc) nach Methode B) bilden sich unter Austausch der Ethoxygruppe durch die Aminogruppe und unter Eliminierung von EtOH die 1‐Aminobuten‐3‐one (III).
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