Enol ether
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2008-06-24T08:47:30Z
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[[Image:Enol ether.png|thumb|right|The structure of a typical enol ether group.]]
An '''enol ether''' is an [[alkene]] with an [[alkoxy]] [[substituent]]. The general structure is <math>R_1R_2C=CR_3-O-R_4</math> with R an [[alkyl]] or an [[aryl]] group. Enol ethers and [[enamine]]s are so-called activated alkenes or electron rich alkenes because the oxygen atom donates electrons to the double bond by forming a [[resonance structure]] with the corresponding [[oxonium ion]]. This property makes them reactive substrates in certain [[organic reaction]]s such as the [[Diels-Alder reaction]]. An enol ether can be considered the [[ether]] of the corresponding [[enolate]], hence the name. Two simple enol ethers are ''ethyl vinyl ether'' and ''2,3-dihydrofuran''.
[[Category:Functional groups]]
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