1-Oxyallyl anions (2) are synthetic equivalents of the aldehyde- and ketone-ho-moenolates (1), which—even if they are highly alkylated—can be generated without problem. They react with carbonyl compounds predominantly in the γ-position to give the hydroxyenol esters (3), which, as protected “homoaldol” derivatives, are preparatively very useful.
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Hoppe et al. (1981) studied this question.
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