Multisubstituted furans were readily prepared from (Z)-or (E)-conjugated enynyl acetates with NXS under metal-free conditions at room temperature via the same haloallenyl ketone intermediates. This tandem haloallenyl ketone formation–furan formation reaction sequence
[Clive, D. L. J.; Farina, Vittorio; Singh, Alok; Wong, Chi Kwong; Kiel, William, A.; Menchen, Steven M. Journal of Organic Chemistry, 1980 , vol. 45, # 11 p. 2120 - 2126]