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  • Title: Direct construction of fused indoles by gold-catalyzed cascade cyclization of conjugated diynes.
    Author: Naoe S, Saito T, Uchiyama M, Oishi S, Fujii N, Ohno H.
    Journal: Org Lett; 2015 Apr 03; 17(7):1774-7. PubMed ID: 25763802.
    Abstract:
    A gold-catalyzed cascade cyclization of aniline derivatives bearing a conjugated diyne moiety was developed. Following the 5-endo-dig indole formation, subsequent 7-endo-dig cyclization predominated over 6-exo-dig cyclization to give the indole fused with a seven-membered ring in good yields.
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