ChemInform Abstract: Gold‐Catalyzed [4 + 3] and [4 + 4]‐Annulation Reactions of t‐Butyl Propiolate Derivatives with Epoxides and Oxetanes for the Construction of 1, 4‐Dioxepane and 1, 5‐Dioxocane Cores. Issue 41 (September 2016)