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  • Title: Rhodium-catalyzed enantio- and diastereoselective intramolecular [2 + 2 + 2] cycloaddition of unsymmetrical dienynes.
    Author: Sagae H, Noguchi K, Hirano M, Tanaka K.
    Journal: Chem Commun (Camb); 2008 Aug 28; (32):3804-6. PubMed ID: 18685783.
    Abstract:
    A cationic rhodium(i)/(R)-H(8)-BINAP or (R)-Segphos complex catalyzes an intramolecular [2 + 2 + 2] cycloaddition of unsymmetrical dienynes, leading to fused tri- and tetracyclic cyclohexenes bearing two tertiary or quaternary carbon centers in high yields with high enantio- and diastereoselectivity.
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