Reagent-Controlled Regioselective [3,3]-Sigmatropic Rearrangement of N-Trifluoroacetyl Enehydroxylamine and Its Synthetic Application - Takeda, Norihiko; Miyata, Okiko; Kitamura, Maria; Kagehira, Shunsuke; Naito, Takeaki (Synlett, 2006)