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Volumn 63, Issue 11, 1998, Pages 3764-3768

Efficient Synthesis of Symmetrical 2,5-Disubstituted Benzoquinones via Palladium-Catalyzed Double Negishi Coupling

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EID: 0000568291     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo9721812     Document Type: Article
Times cited : (33)

References (45)
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    • (c) Hall, N. Science 1994, 266, 32.
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    • Hall, N.1
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    • For examples, see: (a) Nagoaka, H,; Kishi, Y. Tetrahedron 1981, 37, 3873. (b) Furusaki, A.; Watanabe, T. Chem. Pharm. Bull. 1973, 21, 931. (c) Maddaford, S. P.; Andersen, N. G.; Cristofoli, W. A.; Keay, B. A. J. Am. Chem. Soc. 1996, 118, 10766.
    • (1981) Tetrahedron , vol.37 , pp. 3873
    • Nagoaka, H.1    Kishi, Y.2
  • 14
    • 0006523307 scopus 로고
    • For examples, see: (a) Nagoaka, H,; Kishi, Y. Tetrahedron 1981, 37, 3873. (b) Furusaki, A.; Watanabe, T. Chem. Pharm. Bull. 1973, 21, 931. (c) Maddaford, S. P.; Andersen, N. G.; Cristofoli, W. A.; Keay, B. A. J. Am. Chem. Soc. 1996, 118, 10766.
    • (1973) Chem. Pharm. Bull. , vol.21 , pp. 931
    • Furusaki, A.1    Watanabe, T.2
  • 15
  • 22
    • 0037990209 scopus 로고    scopus 로고
    • Palladium-Catalyzed 1,4-Oxidations of Conjugateted Dienes
    • Stang, P., Diederich, F., Eds.; VCH: Weinheim
    • (a) Bäckvall, J. E. Palladium-Catalyzed 1,4-Oxidations of Conjugateted Dienes. Review in Metal-catalyzed Cross-coupling Reactions; Stang, P., Diederich, F., Eds.; VCH: Weinheim, 1998; pp 339-385.
    • (1998) Metal-catalyzed Cross-coupling Reactions , pp. 339-385
    • Bäckvall, J.E.1
  • 29
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    • and reference cited therein
    • Knochel, P.; Singer, R. D. Chem. Rev. 1993, 93, 2117 and reference cited therein.
    • (1993) Chem. Rev. , vol.93 , pp. 2117
    • Knochel, P.1    Singer, R.D.2
  • 37
    • 0025783715 scopus 로고
    • 13 for the 1,4-oxidation of 2-phenyl-1,3-cyclohexadiene (7) afforded 3,6-diacetoxy-1-phenylcyclohexane (8) in moderate yield (43%) with a cis/trans ratio of 86/14. Disappointingly, the cis and the trans product were obtained as racemates. The interesting observation is that the cis/trans selectivity (86/14) is reversed compared to any previously employed ligands in the reaction under chloride-free conditions (see: Grennberg, H.; Langer, V.; Bäckvall, J. E. J. Chem. Soc., Chem. Commun. 1991, 1190). This high cis selectivity in the oxidation indicates a bis-chelation of the ligand to palladium during the activation of the π-allyl complex. The bis-coordination prevents coordination of acetate to palladium, and as a result, mainly external attack by acetate occurs, affording the cis-product.
    • (1991) J. Chem. Soc., Chem. Commun. , pp. 1190
    • Grennberg, H.1    Langer, V.2    Bäckvall, J.E.3


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