Intramolecular Carbon-Carbon Bond Forming Reactions Mediated by XTi(OPr-i)3 (X = Cl or OPr-i) / 2i-PrMgBr Reagent: Efficient Synthesis of Cyclopentanols Having an Ethenylidene or Alkynyl Moiety at the β-Position - Yoshida, Yukio; Nakagawa, Takashi; Sato, Fumie (Synlett, 1996)