Fragmentation of dialkyl peroxides and ozonides is strongly influenced by the choice of Lewis acid. TiCl4 promotes C-O ionization (SN1 reaction) of tertiary peroxides while SnCl4 and BF3·OEt2 promote O-O heterolysis (Hock reaction). The cationic intermediates are trapped with allyltrimethylsilane to afford allylated alkanes and homoallyl ethers. In the absence of a nucleophile, ozonides (1,2,4-trioxolanes) invariably undergo O-O heterolysis. However, the combination of allyltrimethylsilane and SnCl4 results in formation of 1,2-dioxolanes via trapping of intermediates derived from SN1 ionization.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of the Chemical Society, Perkin Transactions 1|
|State||Published - Jan 1 2000|
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