Reaction of the 1,3-dioxole, 9, the 1,3-dioxan, 18, and the 1,3-dioxepin, 29, with tert-butoxy radicals gave evidence in each case for formation of the corresponding 1,1-dioxyethyl radicals. No conclusive evidence for formation of any of these radicals by cyclization of acetoxyaryl radicals could be obtained. Several of the 1,1-dioxyethyl radicals reacted by rearrangement.
1,3-二氧杂环戊烷(9)、1,3-二氧杂环己烷(18)和1,3-二氧杂环庚烷(29)与叔丁氧基自由基反应,在每种情况下都证明了相应1,1-二氧乙基自由基的形成。没有获得任何这些自由基是通过乙酰氧基芳基自由基环化形成的结论性证据。其中几种1,1-二氧乙基自由基通过重排反应。