A new ring transformation: Synthesis of 5,5-dimethyl-3-oxo-1-pyrroline 1-oxides from 6,6-dimethyl-4-oxo-5,6-dihydro-1,2,4h-oxazines |
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| Authors: | Christian Deshayes Suzanne Gelin |
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| Institution: | Laboratoire de Chimie Organique, Institut National des Sciences Appliquées 69621, Villeurbanne, France |
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| Abstract: | The nitrosation of some γ,δ-unsaturated β-diketo compounds affords the 3-substituted 4-oxo-5,6-dihydro-1,2,4H-oxazines. These compounds are converted to the isomeric 3-oxo-1-pyrroline 1-oxides by a facile thermal rearrangement. |
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