Tetrahedron Letters p. 837 - 840 (1997)
Update date:2022-08-10
Topics:
Kobayashi, Kazuhiro
Uneda, Tomokazu
Kawakita, Masataka
Morikawa, Osamu
Konishi, Hisatoshi
Treatment of 3-phenyliodonio-1,2,3,4-tetrahydronaphthalenides with terminal acetylenes in the presence of a bis(triphynylphosphine)palladium chloride-cuprous iodide catalyst or cuprous oxide in N-methylpiperidine or pyridine, respectively, furnished the corresponding 2-substituted naphtho[2,3-b]furan-4,9-diones in moderate to good yields. The utility of this method was demonstrated in the synthesis of a cytotoxic natural product, 2-(1-hydroxyethyl)naphtho[2,3-b]furan-4,9-dione.
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