Lipase–triethylamine-mediated dynamic transesterification of a tricyclic acyloin having a latent meso-structure: a new route to optically pure oxodicyclopentadiene

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Takahiko Taniguchi and Kunio Ogasawara


Abstract

The racemic tricyclic acyloin (±)-endo-3-hydroxytricyclo[4.2.1.02,5]non-7-en -4-one has been dynamically resolved via the transient formation of the meso-enediol isomer under lipase–triethylamine-mediated kinetic transesterification conditions to give the single chiral acetate (-)-endo-3-acetoxytricyclo[4.2.1.02,5]non-7-en- 4-one, serving as a precursor of (-)-oxodicyclopentadiene, in excellent optical and chemical yields.


References

  1. R. D. Miller, D. L. Dolce and V. Y. Merritt, J. Org. Chem., 1976, 41, 1221 CrossRef CAS.
  2. cf.T. Taniguchi, Y. Goto and K. Ogasawara, Synlett, in the press Search PubMed.
  3. (a) K. Tanaka and K. Ogasawara, Synthesis, 1995, 1237 CrossRef CAS; (b) T. Sugahara, Y. Kuroyanagi and K. Ogasawara, Synthesis, 1996, 1101 CrossRef CAS.
  4. For reviews on dynamic kinetic resolution, see R. S. Ward, Tetrahedron: Asymmetry, 1995, 6, 1475 Search PubMed; H. Stecher and K. Faber, Synthesis, 1997, 1 CrossRef CAS.
  5. For recent examples, see (a) N. J. Turner, J. R. Winterman, R. NcCague, J. S. Paratt and J. C. Taylor, Tetrahedron Lett., 1995, 36, 1113 CrossRef CAS; (b) J. V. Allen and J. M. J. Williams, Tetrahedron Lett., 1996, 37, 1859 CrossRef CAS; (c) M. van den Heuvel, A. D. Cuiper, H. van der Deen, R. M. Kellogg and B. L. Feringa, Tetrahedron Lett., 1997, 38, 1655 CrossRef CAS.
  6. For a non-dynamic kinetic resolution of acyloins, see D. Gala, D. J. DiBenedetto, J. E. Clark, B. L. Murphy, D. P. Schumacher and M. Steinman, Tetrahedron Lett., 1996, 37, 611 Search PubMed; W. Adam, M. T. Maria, R. T. Fell and C. R. Saha-Moeller, Tetrahedron: Asymmetry, 1996, 7, 2207 CrossRef CAS.
  7. cf. F. Theil, S. Ballschuh, A. Kunath and H. Schick, Tetrahedron: Asymmetry, 1991, 2, 1031 Search PubMed; F. Theil, J. Weidner, S. Ballschuh, A. Kunath and H. Schick, Tetrahedron Lett., 1993, 34, 305 CrossRef CAS; T. Sugahara and K. Ogasawara, Tetrahedron Lett., 1996, 37, 205 CrossRef CAS.
  8. S. Takano, K. Inomata and K. Ogasawara, Chem. Lett., 1989, 359 CAS.
  9. For a pertinent review, see K. Ogasawara, J. Synth. Org. Chem. Jpn., 1996, 54, 15 Search PubMed.
  10. For a recent synthesis of optically active 8, see J. Knol and B. L. Feringa, Tetrahedron Lett., 1997, 38, 2527 Search PubMed and references cited therein.
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