Heterocycles

Research outputs

  1. 2000
  2. Published

    A synthesis of (+-)-dihydronitraraine

    Päiviö, E., Berner, M., Tolvanen, A. & Jokela, R., 2000, In : Heterocycles. 53, 10, p. 2241-2246

    Research output: Contribution to journalArticle

  3. 1999
  4. Published

    Conformational Study of Geissoschizine Isomers and their Model Compounds

    Lounasmaa, M. & Hanhinen, P., 1999, In : Heterocycles. 51, p. 649-670

    Research output: Contribution to journalArticle

  5. Published

    Deutrium Incorporation into Reserpine

    Lounasmaa, M., Berner, M., Tolvanen, A. & Jokela, R., 1999, In : Heterocycles. 52, p. 471-474

    Research output: Contribution to journalArticle

  6. Published
  7. Published
  8. Published

    Effect of C-1, C-2, and C-3 substituents on the conformational equilibrium of indolo[2,3-alpha]quinolizidines

    Lounasmaa, M. & Hanhinen, P., 1999, In : Heterocycles. 51, 9, p. 2227-2254

    Research output: Contribution to journalArticle

  9. Published

    Effect of C-1, C-2, and C-3 Substituents on the Conformational Equilibrium of IndoloÄ2,3-aÅquinolizidines

    Lounasmaa, M. & Hanhinen, P., 1999, In : Heterocycles. 51, p. 2227-2254

    Research output: Contribution to journalArticle

  10. Published

    General strategies in the preparation of antirhine-type indole alkaloids

    Hanhinen, P., Putkonen, T. & Lounasmaa, M., 1999, In : Heterocycles. 51, 8, p. 1827-1842

    Research output: Contribution to journalArticle

  11. Published

    Model Studies on Interconversion of Roxburghine-type Alkaloids.Acid-Catalysed Epimerization of C-12B Substituted Indolo[2,3-a]quinolizidine Derivatives

    Lounasmaa, M., Berner, M., Mansus, A. & Tolvanen, A., 1999, In : Heterocycles. 51, p. 501-504

    Research output: Contribution to journalArticle

  12. Published

    Novel Zinc Mediated Indole Ring Opening of Isoreserpine

    Berner, M., Tolvanen, A., Lounasmaa, M. & Jokela, R., 1999, In : Heterocycles. 51, p. 2941-2948

    Research output: Contribution to journalArticle

  13. Published

    Substituent effects on the rate of acid-catalysed epimerization of indolo[2,3-a]quinolizidines

    Lounasmaa, M., Berner, M. & Tolvanen, A., 1999, In : Heterocycles. 50, 1, p. 243-250

    Research output: Contribution to journalArticle

  14. Published

    Total Synthesis of (+-)-Deethyleburnamonine and Vindeburnol (RU 24722) with the Corresponding Nitriles as Starting Material

    Lounasmaa, M., Din Belle, D. & Tolvanen, A., 1999, In : Heterocycles. 51, p. 1125-1130

    Research output: Contribution to journalArticle

  15. 1998
  16. Published

    Acid-catalysed C-3 epimerization of reserpine and other indolo[2,3-a]quinolizidines

    Lounasmaa, M., Berner, M. & Tolvanen, A., 1998, In : Heterocycles. 48, 6, p. 1275-1290

    Research output: Contribution to journalArticle

  17. Published

    Biomimetic Formation and Interconversion in the Heteroyohimbine Series

    Lounasmaa, M. & Hanhinen, P., 1998, In : Heterocycles. 48, 7, p. 1483-1492

    Research output: Contribution to journalArticle

  18. Published

    Preparation of (+-)-Hirsutine and (+-)-3-Isocorynantheidine

    Lounasmaa, M., Jokela, R., Laine, C. & Hanhinen, P., 1998, In : Heterocycles. 49, 1, p. 445-450

    Research output: Contribution to journalArticle

  19. 1997
  20. Published

    Formation of 3-iso-19-epicathenamine, isolated as its cyano adduct 21-(alpha)-cyano-3-isorauniticine

    Lounasmaa, M. & Hanhinen, P., 1997, In : Heterocycles. 45, 8, p. 1529-1536

    Research output: Contribution to journalArticle

  21. Published
  22. Published

    Synthesis and conformational study of indolo[2,3-a]quinolizidine-3-ethan-1'-ols: intermediates for the synthesis of deplancheine and flavopereirine

    Lounasmaa, M., Karinen, K. & Tolvanen, A., 1997, In : Heterocycles. 45, 7, p. 1397-1404

    Research output: Contribution to journalArticle

  23. Published

    Synthesis of (+-)-cathenamine and (+-)-19-epicathenamine, isolated as their C-21-(alpha)-cyano derivatives

    Lounasmaa, M., Jokela, R., Hanhinen, P. & Anttila, U., 1997, In : Heterocycles. 45, 4, p. 779-786

    Research output: Contribution to journalArticle

  24. 1996
  25. Published

    [1]H- and [13]C-NMR Spectral Data of Five Sarpagine-type Alkaloids

    Jokela, R. & Lounasmaa, M., 1996, In : Heterocycles. 43, 5, p. 1015-1020

    Research output: Contribution to journalArticle

  26. Published

    Claisen orthoester rearrangement in the direct preparation of deplancheine derivatives possessing a malonyl group at C-15

    Lounasmaa, M. & Hanhinen, P., 1996, In : Heterocycles. 43, 9, p. 1981-1989

    Research output: Contribution to journalArticle

  27. Published

    Preparation and conformational study of deformyl-Z- and deformyl-E-geissoschizine epimers and N(a)-Boc derivatives, and their N(b)-oxides

    Lounasmaa, M., Jokela, R., Hanhinen, P., Laine, C. & Anttila, U., 1996, In : Heterocycles. 43, 8, p. 1699-1712

    Research output: Contribution to journalArticle

  28. Published
  29. Published

    Short synthetic route to 5,6-dihydroflavopereirine and flavopereirine

    Lounasmaa, M., Hanhinen, P. & Lipponen, S., 1996, In : Heterocycles. 43, 7, p. 1365-1370

    Research output: Contribution to journalArticle

  30. 1995
  31. Published

    Preparation of 17-Deoxy-E-isositsirikine cis-N(b)-oxides and Their Use as Model Compounds

    Lounasmaa, M., Hanhinen, P. & Jokela, R., 1995, In : Heterocycles. 41, 5, p. 995-1000

    Research output: Contribution to journalArticle

  32. Published

    Total Synthesis of N(a),O-Di-boc-5b-cyano-Z-geissoschizine and N(a)-Boc-21a-cyanotetrahydroalstonine, the Latter a Synthetic Equivalent of N(a)-Boc-cathenamine

    Lounasmaa, M., Halonen, M. & Jokela, R., 1995, In : Heterocycles. 41, 4, p. 807-816

    Research output: Contribution to journalArticle

  33. Published
  34. 1994
  35. Published

    Preparation and Conformational Study of Z-Isositsirikine Model Compounds and Their cis-N(b)-Oxides.Determination of the C-16 Conformation

    Hanhinen, P., Nurminen, T., Jokela, R. & Lounasmaa, M., 1994, In : Heterocycles. 38, 9, p. 2027-2044

    Research output: Contribution to journalArticle

  36. Published

    Synthesis of N(a)-Boc-5b-cyano-deformyl-E-geissoschizine: a Potential Synthon in the Preparation of Sarpagan and Ajmalan Ring Systems

    Jokela, R., Halonen, M. & Lounasmaa, M., 1994, In : Heterocycles. 38, 1, p. 189-196

    Research output: Contribution to journalArticle

  37. 1993
  38. Published

    Cleavage of the Deformyl-Z- and Deformyl-E-geissoschizine Derivatives Utilizing the Modified Polonovski Reaction

    Lounasmaa, M., Jokela, R., Halonen, M. & Miettinen, J., 1993, In : Heterocycles. 36, 11, p. 2523-2530

    Research output: Contribution to journalArticle

  39. Published

    Complete 1H-NMR Spectral Assignments of Six 3-Ethylindolo(2,3-a)quinolizidine N-Oxides.NOE Difference Spectroscopy Applied to Conformational Analysis

    Jokela, R. & Lounasmaa, M., 1993, In : Heterocycles. 36, 10, p. 2373-2382

    Research output: Contribution to journalArticle

  40. Published

    Short, Stereoselective Synthesis of N(a)-Boc-5b-Cyano-deformyl-Z-geissoschizine, a Prototype of Potential Synthons in the Preparation of Sarpagan and Ajmalan Ring Systems

    Jokela, R., Halonen, M. & Lounasmaa, M., 1993, In : Heterocycles. 36, 5, p. 1115-1126

    Research output: Contribution to journalArticle

  41. Published

    Total Synthesis of ()-Eburnaminol and ()-Larutensine, Alkaloids from Kopsia larutensis

    Lounasmaa, M. & Karvinen, E., 1993, In : Heterocycles. 36, 4, p. 751-760

    Research output: Contribution to journalArticle

  42. 1992
  43. Published

    A New, Short Synthesis of ()-Eburnamonine

    Karvinen, E. & Lounasmaa, M., 1992, In : Heterocycles. 34, 9, p. 1773-1782

    Research output: Contribution to journalArticle

  44. Published

    New, Short Synthesis of ()-Geissoschizine

    Lounasmaa, M., Jokela, R., Miettinen, J. & Halonen, M., 1992, In : Heterocycles. 34, 8, p. 1497-1502

    Research output: Contribution to journalArticle

  45. Published
  46. Published

    Synthesis of ()-Z-Geissoschizol, ()-3-Epi-Z-geissoschizol, ()-Corynantheidol, ()-Dihydrocorynantheol, ()-3-Epi-dihydrocorynantheol and the Corresponding Corynan-17-oic Acid Methyl Esters

    Lounasmaa, M., Jokela, R., Tirkkonen, B., Miettinen, J. & Halonen, M., 1992, In : Heterocycles. 34, 2, p. 321-339

    Research output: Contribution to journalArticle

ID: 253618