Hafnium Trifluoromethanesulfonate [Hf(OTf)4]-Catalyzed Conjugate Addition of Indoles to α,β-Enones
Motoi Kawatsura*a, Sachiko Aburatanib, Junichi Uenishib a Department of Materials Science, Faculty of Engineering, Tottori University, Koyama, Tottori 680-8552, Japan b Kyoto Pharmaceutical University, Misasagi, Yamashina, Kyoto 607-8412, Japan Fax: +81(857)315179; e-Mail: kawatsur@chem.tottori-u.ac.jp;
