Intermolecular bromoesterification of conjugated enynes: an efficient synthesis of bromoallenes†
Abstract
We have discovered that bromine electrophile and carboxylate nucleophile can be added to conjugated enynes intermolecularly in a 1,4-fashion with high diastereoselectivity. Highly functionalized bromoallenes with an adjacent stereogenic centre were prepared from readily available conjugated 1,3-enynes.