An Atom-Economical and Environmentally Benign Preparation of ­Unsymmetrical Bis-allyl Ethers via Dimerization of Baylis-Hillman Adducts Catalyzed by Cesium Hydroxide Monohydrate

Promoted by a catalytic amount of cesium hydroxide monohydrate, unsymmetrical bis-allyl ethers consisting of an £ -allylic unit and a terminal allylic unit were formed via dimerization of Baylis-Hillman adducts in moderate to good yields at room temperature.