Highly stereocontrolled synthesis of (2E,4Z)-dienoic esters with alumina catalyst. Its application to total syntheses of flavor components and insect pheromones
β—Mono- and β,β—disubstituted α,β-unsaturatedesters can be prepared in good yields stereoselectively by the stepwise alkylation and alkoxycarbonylation of 2-bromo-1-alkenylboronates.