SCHEDULED MAINTENANCE
Deoxygenation of pyrazine endoperoxides with triphenylphosphine can result in ring contraction to imidazoles, a process involving the heterocyclic analogues of arene oxides, these being in equilibrium with the corresponding 3,6,1-diazoxepins.
A. J. O'Connell, C. J. Peck and P. G. Sammes, J. Chem. Soc., Chem. Commun., 1983, 399 DOI: 10.1039/C39830000399
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