Synthesis of 1,5-Enynes by Brønsted Acid Catalyzed Substitution of Propargylic Alcohols and One-Pot Synthesis of Bicyclo[3.1.0]hexenes - Sanz, Roberto; Martínez, Alberto; Miguel, Delia; Álvarez-Gutiérrez, Julia M; Rodríguez, Félix (Synthesis, 2007)