Bildung von 1,2-Dioxolanen aus Cyclopropanen

Formation of 1,2-Dioxolanes from Cyclopropanes The already known carenols 5 and 7 are obtained by stereoselective oxirane cleavage of (1S,3S,4R,6R)-( + )-3α,4α-epoxycarane (4). Autoxidation of the ketone 8, derived from 7, failed to give any 1,2-dioxolane derivatives. 5 is converted to the hydroperoxide 9 by cyclopropane opening using 70% hydrogen peroxide solution. Cyclization of 9 with lead tetraacetate affords the dioxolane 10.

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