Chemo-, Regio- and Stereoselective Synthesis of 2-Alkylidene-5-hydroxymethyl-hydrofurans by Cyclization of 1,3-Dicarbonyl-Dianions with 1-Bromo-2,3-Epoxypropanes - Langer, Peter; Freifeld, Ilya; Holtz, Edith (Synlett, 2000)