Unusual Au(III)-catalyzed dimerization of benzoxazol-2-yloxy enynes: Formation of substituted 1,5-cyclooctadienes

Symmetric 1,5-cyclooctadienes were formed via Au-catalyzed dimerization of benzoxazol-2-yloxy enynes, involving double nucleophilic attacks of alkenylgolds toward allylic cations.