Pirjo Hanhinen

Preparation and conformational study of Z- and E-Isositsirikine epimers and model compounds. Determination of their C-16 configurations

Mauri Lousnasmaa, Reija Jokela, Pirjo Hanhinen et al. · Tetrahedron · 1994 · 31 citations

Materials Science, Chemical Engineering, E-isositsirikine Epimers +10

Short synthesis of (±)-hirsutine: Direct addition of dimethyl malonate anion to a 1,4-conjugate iminium salt of appropriate 3-ethylindolo[2,3-a]quinolizidine

Mauri Lounasmaa, Jari Miettinen, Pirjo Hanhinen et al. · Tetrahedron Letters · 1997 · 21 citations

1,4-Conjugate Iminium Salt, Organic Chemistry, Direct Addition +5

Conformational Study of Geissoschizine Isomers and Their Model Compounds

Mauri Lounasmaa, Pirjo Hanhinen · Heterocycles · 1999 · 16 citations · Full text

Combinatorial Chemistry, Geissoschizine Isomers, Conformational Study +7

Claisen orthoester rearrangement in the direct preparation of Z-isositsirikine and Z-geissoschizine derivatives possessing the right oxidation state at C-17

Mauri Lounasmaa, Pirjo Hanhinen, Reija Jokela · Tetrahedron · 1995 · 14 citations

Claisen Orthoester Rearrangement, Chemical Engineering, Direct Preparation +7

Studies on the biomimetic preparation of the sarpagan ring system. Attempts to apply the spontaneous “biogenetic-type cyclization” of van Tamelen to bond formation between C-5 and C-16 in the corynantheine series

Mauri Lounasmaa, Pirjo Hanhinen · Tetrahedron · 1996 · 14 citations

Bioorganic Chemistry, Biomimetic Preparation, Engineering +8