Hg(OTf)2-Catalyzed Instantaneous Hydration of β- and δ-Hydroxy Internal Alkynes with Complete Regioselectivity - Nishizawa, Mugio; Takemoto, Takayuki; Sasaki, Ikuo; Nakano, Mayo; Ho, Elisabeth; Namba, Kosuke; Yamamoto, Hirofumi; Imagawa, Hiroshi (Synlett, 2009)