Tanaka Ryoichi, Nakano Yoshitaka, Suzuki Daisuke, Urabe Hirokazu, Sato Fumie
Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
J Am Chem Soc. 2002 Aug 21;124(33):9682-3. doi: 10.1021/ja027008o.
Dialkoxytitanacyclopentadienes, prepared from two different acetylenes and a divalent titanium alkoxide reagent, Ti(O-i-Pr)4/2 i-PrMgCl, reacted with propargyl bromide to give directly benzyltitanium compounds. The resultant benzyltitanium compounds underwent deuteriolysis, iodinolysis (with I2), or oxygenation (with O2 gas) to give the corresponding deuterium-labeled compounds, iodides, or alcohols, illustrating their synthetic versatility. The first synthesis of alcyopterosin A, a bicyclic aromatic sesquiterpenoid recently isolated and characterized, has been achieved by this method, starting with an appropriate combination of an acetylene and a diyne.
