= Enol carbonate
An <enol carbonate> is an <enol> derivative whose oxygen bears a carbonate ester group, represented schematically by $\mathrm{R_2C=CR-O-C(=O)-OR'}$. The enol-derived carbon-carbon <double bond> and the carbonate group are both part of its reactivity.
Masking an enol as a derivative allows its structure and reactions to be controlled separately from those of the parent carbonyl compound. The exact substitution pattern therefore matters when using an <enol carbonate> in synthesis.
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