Evidence for the reaction of nitrosocarbonyl compounds as heterodienes in the Diels–Alder reaction

@inproceedings{Mackay1977EvidenceFT,
  title={Evidence for the reaction of nitrosocarbonyl compounds as heterodienes in the Diels–Alder reaction},
  author={Donald J. Mackay and K. N. Watson and Le Hoang Dao},
  year={1977}
}
Evidence is given that a nitrosocarbonyl compound can react with a cyclic diene to give a 5,6-dihydro-1,4,2-dioxazine, not only by isomerisation of an initially formed 2-acyl-3,6-dihydro-1,2-oxazine, but also by reacting as a heterodiene directly with a π-bond in the cyclic diene; the role of the ring oxygen in retarding the isomerisation of an oxazine to a dioxazine is discussed. 

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