An Atom-Economical and Environmentally Benign Preparation of Unsymmetrical Bis-allyl Ethers via Dimerization of Baylis-Hillman Adducts Catalyzed by Cesium Hydroxide Monohydrate - Liu, Yunkui; Li, Jian; Zheng, Hui; Xu, Danqian; Xu, Zhenyuan; Zhang, Yongmin (Synlett, 2005)