2,4,7-Trimethyl-7-aza-3-oxatricyclo[3.3.0.02,4]oct-1·(5)-ene-6,8-dione (7), a derivative of the rarely observed Dewar furan ring-system, has been prepared by Zn–TiCl4 debromination of dibromide (6) and trapped in in situ with furan.
I. G. Pitt, R. A. Russell and R. N. Warrener, J. Chem. Soc., Chem. Commun., 1984, 1466 DOI: 10.1039/C39840001466
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