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Download fileAlkyne [2 + 2 + 2] Cyclotrimerization Catalyzed by a Low-Valent Titanium Reagent Derived from CpTiX3 (X = Cl, O‑i‑Pr), Me3SiCl, and Mg or Zn
journal contribution
posted on 2018-10-29, 19:37 authored by Sentaro Okamoto, Takeshi Yamada, Yu-ki Tanabe, Masaki SakaiInter-, partially intra-, and intramolecular
[2 + 2 + 2] cycloadditions
of alkynes were catalyzed by a low-valent titanium species generated in situ from the reduction of CpTi(O-i-Pr)3, CpTiCl3, or Cp*TiCl3 with Mg or Zn
powder in the presence of Me3SiCl. The role of Me3SiCl as an additive in the reaction mechanism is discussed.