Über die Bildung von Dihydro-1,2-oxazin-N-oxiden durch intramolekulare Addition eines Nitronat-Anions an eine Carbonylgruppe

The Formation of Dihydro-1,2-oxazine N-Oxides through an Intramolecular Addition of a Nitronate Anion to a Carbonyl Group Highly substituted 4-keto-1-nitroalkanes cyclize under basic conditions to dihydro-1,2-oxazine N-oxides. These N-oxides are thermally unstable and decompose to 1,4-diketones, BF₃ catalyzes a similar decomposition, but probably via a different mechanism.