A Titanacycle-to-Carbocycle Relay Leading to an Expedient Synthesis of Cyclopentadienols.
Tandem addition of the two carbon-titanium bonds of a titanacyclopentadiene to the ester group of the same molecule affords carbocycles (shown schematically): The metal portion of the metallacycle has been replaced with a carbon fragment. Depending on the starting diyne, mono-, bi-, or tricyclic compounds can be obtained.
Urabe
H
Department of Biomolecular Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501 (Japan).
Narita
M
Sato
F