Search Results - "Hanhinen, Pirjo"

Ajmalinimine Is an Artifact Not an Alkaloid by Lounasmaa, Mauri, Sainio (née Hanhinen), Pirjo

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Effect of C-1, C-2, and C-3 Substituents on the Conformational Equilibrium of Indolo[2,3-a]quinolizidines by Lounasmaa, Mauri, Hanhinen, Pirjo

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Short, stereospecific total synthesis of (±)-corynantheidine by Lounasmaa, Maun, Jokela, Reija, Laine, Christiane, Hanhinen, Pirjo

“…A short, stereospecfic total synthesis of indole alkaloid (±)-corynantheidine 1 is described…”
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Short Synthetic Route to 5,6-Dihydroflavopereirine and Flavopereirine by Lounasmaa, Mauri, Hanhinen, Pirjo, Lipponen, Sami

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The ajmaline group of indole alkaloids by Lounasmaa, Mauri, Hanhinen, Pirjo

“…This chapter discusses an area of indole alkaloids, which has been neglected in the series for over 30 years—namely, the ajmaline group of alkaloids, where…”
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Revision of the Structure of Ajmalimine by Hanhinen, Pirjo, Lounasmaa, Mauri

“…Careful reexamination of the published 1H and 13C NMR spectral data of ajmalimine (1), an indole alkaloid from the roots of Rauvolfia serpentina, indicates…”
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Interpretation of the Formation of Nine “Artifact Indole Alkaloids” in the Ajmaline/Sarpagine Series by Lounasmaa, Mauri, Hanhinen, Pirjo

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Formation of 3-Iso-19-epicathenamine, Isolated as Its Cyano Adduct 21a-Cyano-3-isorauniticine by Lounasmaa, Mauri, Hanhinen, Pirjo

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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 by Lounasmaa, Mauri, Hanhinen, Pirjo

“…Attempts were made to apply the spontaneous “biogenetic-type cyclization” of van Tamelen to the preparation of the sarpagan ring system by utilizing indolo…”
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Conformational Study of Geissoschizine Isomers and Their Model Compounds by Lounasmaa, Mauri, Hanhinen, Pirjo

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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 by Lounasmaa, Mauri, Miettinen, Jari, Hanhinen, Pirjo, Jokela, Reija

“…Direct addition of dimethyl malonate anion to a 1,4-conjugate iminium salt of 3-ethylindolo[2,3- a]quinolizidine 4a (regenerated from the corresponding…”
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Direct Introduction of Nucleophilic Carbanions to the g-Position of Na-Boc-protected Nb-Tryptophylpyridinium Salts without Electron Withdrawing Substituents at the b-Position by Lounasmaa, Mauri, Hanhinen, Pirjo, Putkonen, Tiina

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Biomimetic Formation and Interconversion in the Heteroyohimbine Series by Lounasmaa, Mauri, Hanhinen, Pirjo

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Claisen orthoester rearrangement in the direct preparation of Z-isositsirikine and Z-geissoschizine derivatives possessing the right oxidation state at C-17 by Lounasmaa, Mauri, Hanhinen, Pirjo, Jokela, Reija

“…The Claisen orthoester rearrangement utilizing allylic alcohol 1 (or 2) and trimethyl 3-methoxyortbopropionate 13a leads to Z-isositsirikine derivatives…”
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Short Synthesis of 14,15-Didehydro-E-deplancheine, Presumed Biosynthetic Intermediate in the Formation from Geissoschizine, of Corynanthé Alkaloids Missing the Three-Carbon Unit at C-15é by Lounasmaa, Mauri, Hanhinen, Pirjo, Jokela, Reija

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Preparation of (±)-Hirsutine and (±)-3-Isocorynantheidine by Lounasmaa, Mauri, Jokela, Reija, Laine, Christiane, Hanhinen, Pirjo

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General Strategies in the Preparation of Antirhine-Type Indole Alkaloids by Lounasmaa, Mauri, Hanhinen, Pirjo, Putkonen, Tiina

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Preparation of 17-Deoxy-E-isositsirikine cis-Nb-Oxides and Their Use as Model Compounds by Lounasmaa, Mauri, Hanhinen, Pirjo, Jokela, Reija

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Short synthetic route to (±)-geissoschizine by Lounasmaa, Mauri, Jokela, Reija, Anttila, Ulla, Hanhinen, Pirjo, Laine, Christiane

“…A short synthetic route to (±)-geissoschizine 1 is described. A short synthetic route to (±)-geissoschizine 1 via O-Boc-geissoschizine 8 is described…”
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Preparation and Conformational Study of Deformyl-Z- and Deformyl-E-geissoschizine Epimers and Na-Boc Derivatives, and Their Nb-Oxides by Lounasmaa, Mauri, Jokela, Reija, Hanhinen, Pirjo, Laine, Christiane, Anttila, Ulla

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