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Christian75 (talk | contribs) →Mechanism and stereochemistry: clean up, typo(s) fixed: a alpha → an alpha |
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<span style="float:right;padding-right:50px;padding-top:30px;">'''''(4)'''''</span>{{center|[[File:ChroMech2.png]]}}
Oxidative cyclizations of olefinic alcohols to cyclic ethers may occur via [3+2], [2+2],<ref>Piccialli, V. ''Synthesis'' '''2007''', 2585.</ref> or [[epoxidation]] mechanisms. Insights into the mechanism is provided by structure-reactivity, implicating direct epoxidation by the chromate ester.<ref>Beihoffer, L.A; Craven, R.A.; Knight, K.S; Cisson, C.R.; Waddell, T.G. ''Trans. Met. Chem.'' '''2005''', ''30'', 582.</ref> Subsequent epoxide opening and release of chromium leads to the observed products.
==Scope and limitations==
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