Sila Morita−Baylis−Hillman Reaction of Cyclopropenes

The first example of sila-Morita-Bayis-Hillman reaction between 1-silylcyclopropenes and carbonyl compounds has been demonstrated. This novel phosphine-catalyzed transformation features a 1,3-Brook rearrangement/elimination cascade and provides convenient access to a variety of 1-(silyloxymethyl)cyclopropenes, which are not easily available via traditional methods.