SCHEDULED MAINTENANCE
Cyclization of 1,4,7-trienes, which are easily prepared by double allylation reaction of alkynes, proceeded in the presence of a stoichiometric or catalytic amount of zirconocene compounds to give only cis isomers (>98% stereoselectivity).
T. Takahashi, M. Kotora and K. Kasai, J. Chem. Soc., Chem. Commun., 1994, 2693 DOI: 10.1039/C39940002693
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