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Volumn 9, Issue 9, 2007, Pages 1745-1748

Straightforward stereoselective synthesis of spiro-epoxyoxindoles

Author keywords

[No Author keywords available]

Indexed keywords

EPOXIDE; INDOLE DERIVATIVE; N METHYLISATIN; N-METHYLISATIN; OXINDOLE; SPIRO COMPOUND; UNCLASSIFIED DRUG;

EID: 34248374439     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol070439x     Document Type: Article
Times cited : (67)

References (56)
  • 13
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    • U.S. Patent 3413299
    • (a) Anthony, W. C. U.S. Patent 3413299, 1968.
    • (1968)
    • Anthony, W.C.1
  • 14
    • 34248363101 scopus 로고
    • U.S. Patent 3397202
    • (b) Plostnieks, J. U.S. Patent 3397202, 1968.
    • (1968)
    • Plostnieks, J.1
  • 15
    • 34248373207 scopus 로고
    • Tokkyo Koho
    • Patent 42015542
    • (c) Kobayashi, G.; Matsuda, Y. Jpn. Tokkyo Koho Patent 42015542, 1967.
    • (1967)
    • Kobayashi, G.1    Matsuda2    Jpn, Y.3
  • 34
    • 0038112083 scopus 로고    scopus 로고
    • To our knowledge, there is no enantioselective synthesis of epoxyoxindoles, although an asymmetric substrate-controlled diastereoselective epoxidation has been reported. See
    • To our knowledge, there is no enantioselective synthesis of epoxyoxindoles, although an asymmetric substrate-controlled diastereoselective epoxidation has been reported. See: Inoue, M.; Sakazaki, H.; Furukawa, H.; Hirama, M. Angew. Chem., Int. Ed. 2003, 42, 2654.
    • (2003) Angew. Chem., Int. Ed , vol.42 , pp. 2654
    • Inoue, M.1    Sakazaki, H.2    Furukawa, H.3    Hirama, M.4
  • 35
    • 34248328634 scopus 로고    scopus 로고
    • There is one example of isatin epoxidation by dimethysulfonium methylide having therefore no diastereoselective issue. See: Bravo, P, Gaudiano, G, Umani-Ronchi, A. Gazz. Chim. Ital. 1970, 100, 652
    • There is one example of isatin epoxidation by dimethysulfonium methylide having therefore no diastereoselective issue. See: Bravo, P.; Gaudiano, G.; Umani-Ronchi, A. Gazz. Chim. Ital. 1970, 100, 652.
  • 39
    • 0041853893 scopus 로고    scopus 로고
    • For recent successful diastereo- and enantioselective sulfur ylide epoxidation of ketones, see
    • For recent successful diastereo- and enantioselective sulfur ylide epoxidation of ketones, see: Aggarwal, V. K.; Bae, I.; Lee, H.-Y.; Richardson, J.; Williams, D. T. Angew. Chem., Int. Ed. 2003, 42, 3274.
    • (2003) Angew. Chem., Int. Ed , vol.42 , pp. 3274
    • Aggarwal, V.K.1    Bae, I.2    Lee, H.-Y.3    Richardson, J.4    Williams, D.T.5
  • 51
    • 34248375538 scopus 로고    scopus 로고
    • 2O (9:1).
    • 2O (9:1).
  • 52
    • 33344460416 scopus 로고    scopus 로고
    • For in situ formation of sulfonium salts for ylide cyclopropanation chemistry, see: Rasmy, O. M, Vaid, R. K, Semo, M J, Chelius, E. C, Robey, R. L, Alt, C. A, Rhodes, G. A, Vivenzi, J. T. Org. Process Res. Dev. 2006, 10, 28. See ref 14 for the the sulfonium salt isolation
    • For in situ formation of sulfonium salts for ylide cyclopropanation chemistry, see: Rasmy, O. M.; Vaid, R. K.; Semo, M J.; Chelius, E. C.; Robey, R. L.; Alt, C. A.; Rhodes, G. A.; Vivenzi, J. T. Org. Process Res. Dev. 2006, 10, 28. See ref 14 for the the sulfonium salt isolation.
  • 54
    • 34248348607 scopus 로고    scopus 로고
    • 1H NMR spectrum; however, according to the X-ray crystal structure, this is a trans-epoxide.
    • 1H NMR spectrum; however, according to the X-ray crystal structure, this is a trans-epoxide.
  • 55
    • 33845683453 scopus 로고    scopus 로고
    • Recently, a related explanation was proposed to account for the diastereoselective sulfonium ylide cyclopropanation of 3-methylene oxindoles. See: Yong, S. R.; Ung, A. T.; Pyne, S. G.; Skelton, B. W.; White, A. H. Tetrahedron 2007, 63, 1191.
    • Recently, a related explanation was proposed to account for the diastereoselective sulfonium ylide cyclopropanation of 3-methylene oxindoles. See: Yong, S. R.; Ung, A. T.; Pyne, S. G.; Skelton, B. W.; White, A. H. Tetrahedron 2007, 63, 1191.
  • 56
    • 18744373347 scopus 로고    scopus 로고
    • The (R,R)-2,5-dimethylthiolane afforded the (+)-epoxide 4a in similar enantioselectivities. For sulfide synthesis, see: Davoust, M.; Brière, J.-F.; Jaffrès, P.-A.; Metzner, P. J. Org. Chem. 2005, 70, 4166.
    • The (R,R)-2,5-dimethylthiolane afforded the (+)-epoxide 4a in similar enantioselectivities. For sulfide synthesis, see: Davoust, M.; Brière, J.-F.; Jaffrès, P.-A.; Metzner, P. J. Org. Chem. 2005, 70, 4166.


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