Synthesis and biological activity of an optically pure 10-spirocyclopropyl analog of huperzine A

(Note: The full text of this document is currently only available in the PDF Version )

Alan P. Kozikowski, K. R. C. Prakash, Ashima Saxena and Bhupendra P. Doctor


Abstract

The synthesis of a spirocyclic analog of huperzine A that bears a cyclopropane ring at its 10-position has been carried out in an enantioselective manner using a diastereoselective Michael–aldol reaction; in assays of AChE inhibition, this compound was found to be nearly as active as huperzine A itself, with comparable on and off rates from the enzyme.


References

  1. J.-S. Liu, Y.-L. Zhu, C.-M. Yu, Y.-Z. Zhou, Y.-Y. Han, F.-W. Wu and B.-F. Qi, Can. J. Chem., 1986, 64, 837 CAS; Y. Xia and A. P. Kozikowski, J. Am. Chem. Soc., 1989, 111, 4116 CrossRef CAS and references cited therein S.-S. Xu, Z.-X. Gao, Z. Weng, Z.-M. Du, W.-A. Xu, J.-S. Yang, M.-L. Zhang, Z.-H. Tong, Y. S. Fang, X.-S. Chai and S.-L. Li, Acta Pharmacol. Sin., 1995, 16, 391 Search PubMed.
  2. G. Campiani, L.-Q. Sun, A. P. Kozikowski, P. Aagaard and M. McKinney, J. Org. Chem., 1993, 58, 7660 CrossRef CAS; A. P. Kozikowski, G. Campiani, V. Nacci, A. Sega, A. Saxena and B. P. Doctor, J. Chem. Soc., Perkin Trans. 1, 1996, 1287 RSC; A. P. Kozikowski, G. Campiani, L.-Q. Sun, S. Wang, A. Saxena and B. P. Doctor, J. Am. Chem. Soc., 1996, 118, 11 357 CrossRef CAS.
  3. A. Saxena, N. Qian, I. M. Kovach, A. P. Kozikowski, Y. P. Pang, D. C. Vellom, Z. Radic, D. Quinn, P. Taylor and B. P. Doctor, Protein Sci., 1994, 3, 1770 CAS . The dual numbering system provides the residue number in the species designated followed by the corresponding residue in Torpedo AChE.
  4. D. A. Dougherty and D. A. Stauffer, Science, 1990, 253, 872.
  5. A. P. Kozikowski and Y. P. Pang, in Trends in QSAR and Molecular Modeling '92, Proceedings of the 9th European Symposium on Structure–Activity Relationships: QSAR and Molecular Modeling, ed. C. G. Wermuth, ESCOM Science Publishers, Leiden, The Netherlands, 1993 Search PubMed; Y. P. Pang and A. P. Kozikowski, J. Comput. Aided Mol. Design, 1994, 8, 669 Search PubMed; M. Raves, M. Harel, Y. P. Pang, I. Silman, A. P. Kozikowski and J. L. Sussman, Nature Struct. Biol., 1997, 4, 57 Search PubMed.
  6. Y. Ashani, J. O. Peggins and B. P. Doctor, Biochem. Biophys. Res. Commun., 1992, 184, 719 CrossRef CAS.
  7. S. M. Ruder and R. C. Ronald, Tetrahedron Lett., 1984, 25, 5501 CrossRef CAS.
  8. F. Yamada, A. P. Kozikowski, E. R. Reddy, Y.-P. Pang, J. H. Miller and M. McKinney, J. Am. Chem. Soc., 1991, 113, 4695 CrossRef CAS . Selected data for 2: m/z(%) 268 (M+, 10), 225 (100); δH(CDCl3) 0.97 (2 H, br m), 1.25 (1 H, br s), 1.57 (3 H, s), 1.66 (3 H, d, J 6.6), 1.70 (1 H, m), 2.12 (1 H, d, J 16.5), 2.23 (1 H, d, J 16.8), 2.65 (1 H, d, J 4.5), 5.46 (1 H, br s), 5.54 (1 H, q, J 12.9, 6.6), 6.35 (1 H, d, J 9.6), 7.87 (1 H, d, J 9.3); δC(CDCl3) 164.4, 146.3, 142.3, 139.8, 134.1, 122.9, 122.3, 116.6, 111.1, 77.4, 55.3, 49.7, 42.8, 29.6, 26.8, 22.6, 17.1, 12.8, 12.4.
  9. D. De La Hoz, B. P. Doctor, J. S. Ralston, R. S. Rush and A. D. Wolfe, Life Sci., 1986, 39, 195 CrossRef CAS.
  10. G. L. Ellman, D. Courtney, V. Andres and R. M. Featherstone, Biochem. Pharmacol., 1961, 1, 88 CrossRef CAS.
  11. H. S. Ved, M. L. Koeinig, J. R. Dave and B. P. Doctor, NeuroReport, 1997, 8, 963 Search PubMed.
Click here to see how this site uses Cookies. View our privacy policy here.