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Article Abstract
A carboxylate-directed regioselective Heck-type alkenylation and alkenylative lactonization of ()-β,γ-unsaturated carboxylic acids by simply substrate control is reported. ()- and ()-alkenyl bromides reacted to give energetically more favorable palladacyles, allowing access to fully stereocontrolled conjugated 1,3-dienes and alkenyled γ-lactones. Mechanistic studies suggest that excellent regioselectivity may be strongly influenced by the steric factors of reactants involved in the palladacycle intermediates.
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