Lanthanide-Catalyzed Synthesis of Cyclic Silicon-Containing Di- and Triperoxides

An efficient method has been developed for the synthesis of di(tri)peroxysilacycloalkanes by cyclization of geminal bis-hydroperoxides and 1,1′-peroxybis(1-hydroperoxycycloalkanes) with bis(methoxymethyl)diphenylsilane in the presence of lanthanide catalysts. Conditions have been found for the reduction of diphenylhexaoxasiladispirocycloalkanes to diphenyltetraoxasiladispirocycloalkanes.