Gold(I) catalyzes a new intermolecular reaction of terminal alkynes with functionalized alkenes that gives 8-oxabicyclo[3.2.1]oct-3-enes by a [2+2+2] cycloaddition process in which two CC bonds and one CO bond are formed (see scheme).
![Intermolecular gold-catalyzed cycloaddition of alkynes with oxoalkenes](https://www.iciq.org/wp-content/uploads/2014/03/Intermolecular-gold-catalyzed_3547.gif)
Gold(I) catalyzes a new intermolecular reaction of terminal alkynes with functionalized alkenes that gives 8-oxabicyclo[3.2.1]oct-3-enes by a [2+2+2] cycloaddition process in which two CC bonds and one CO bond are formed (see scheme).