SCHEDULED MAINTENANCE
Ytterbium metal has been used to promote cyclodimerization of α,β-unsaturated ketones and esters, leading to cyclopentanol, cyclopentanone, or cyclohexanone derivatives, regio- and stereo-selectively.
K. Takaki, F. Beppu, S. Tanaka, Y. Tsubaki, T. Jintoku and Y. Fujiwara, J. Chem. Soc., Chem. Commun., 1990, 516 DOI: 10.1039/C39900000516
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