P
Pirjo Hanhinen
Researcher at University of Helsinki
Publications - 45
Citations - 251
Pirjo Hanhinen is an academic researcher from University of Helsinki. The author has contributed to research in topics: Orthoester & Indole test. The author has an hindex of 9, co-authored 45 publications receiving 231 citations.
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Book ChapterDOI
Chapter 2 – The Sarpagine Group of Indole Alkaloids
Journal ArticleDOI
Preparation and conformational study of Z- and E-Isositsirikine epimers and model compounds. Determination of their C-16 configurations
TL;DR: In this paper, a synthesis for isositsirikine isomers 1-6 and (16S*)-and (16R*)-17-deoxy-E -isositirikines 9 and 10 was reported.
Book ChapterDOI
The ajmaline group of indole alkaloids.
Mauri Lounasmaa,Pirjo Hanhinen +1 more
TL;DR: This chapter discusses an area of indole alkaloids, which has been neglected in the series for over 30 years—namely, the ajmaline group of alkaloid, where numerous advances in chemistry and biosynthesis have been made recently.
Journal ArticleDOI
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
TL;DR: In this paper, the authors showed that the addition of dimethyl malonate anion to a 1,4-conjugate iminium salt of 3-ethylindolo[2,3-a ]quinolizidine 4a (regenerated from the corresponding α-aminonitrile 4b ) afforded enamine 5.
Journal ArticleDOI
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 +1 more
TL;DR: In this article, the spontaneous "biogenetic-type cyclization" of van Tamelen was applied to the preparation of the sarpagan ring system by utilizing indolo [2,3-a]quinolizidines.