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  • Title: Synthesis of bridged medium-sized rings through the intramolecular Pauson-Khand reaction.
    Author: Lovely CJ, Seshadri H, Wayland BR, Cordes AW.
    Journal: Org Lett; 2001 Aug 09; 3(16):2607-10. PubMed ID: 11483072.
    Abstract:
    [reaction: see text] A series of aromatic enynes containing steric buttressing elements were prepared and evaluated in the NMO-mediated Pauson-Khand cyclization. O-Allyl systems led to the expected angularly fused products, whereas the O-butenyl and O-pentenyl derivatives afforded the unprecedented bridge systems.
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