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Hydrolysis of allyl carbinol oxides in aqueous HClO 4 gave the corresponding 1,2,4 triols. On heating in the same reaction medium, they underwent cyclization into 3 hydroxy tetrahydrofurans. The method is restricted to substrates that can generate stable carbocations via elimination of the hydroxy group from position 4 in intermediate 1,2,4 triols.

Dehydrobromination of vicinal dibromoalkanes in systems comprising 1,2 dimethoxy ethane, N butyl N´ methylimidazolium tetrafluoroborate (or tetrabutylammonium bromide), and a base with subsequent palladium catalyzed cross coupling of the thus formed bromoalkenes with arylboronic acids furnished substituted styrenes.

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