Addition of organocopper reagents to α β unsaturated carbonyl compounds enones and conjugated esters generates enolates with concomitant introduction of an organic group at the β position. Organolithium cuprates r 2 culi are particularly useful for conjugate or 1 4 addition to α β unsaturated aldehydes and ketones. Effect of cuprate stoichiometry on stereochemistry and regiochemistry derrick l j.
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