The IPB has once again been recognized for its exemplary actions in terms of equal opportunity-oriented personnel and organizational policies and has received the TOTAL E-QUALITY certification for the…
The Plant Science Student Conference (PSSC) has been organised by students from the two Leibniz institutes, IPK and IPB, every year for the last 20 years. In this interview, Christina Wäsch (IPK) and…
From Fissistigma bracteolatum Chatt. (Annonaceae), a Vietnamese folk medicinal plant, the novel type natural products fissistigmatin A–D (1–4), being composed of a flavonoid and a sesquiterpene moiety, were isolated. Their structures were elucidated by extensive NMR techniques, MS, CD, molecular modelling calculations and X-ray analysis.
Publications
Voigt, B.; Porzel, A.; Bruhn, C.; Wagner, C.; Merzweiler, K.; Adam, G.;Synthesis of 24-epicathasterone and related brassinosteroids with modified side chainTetrahedron5317039-17054(1997)DOI: 10.1016/S0040-4020(97)10146-6
The synthesis of 24-epicathasterone (20), 22-deoxy-24-epiteasterone (22) and 24-hydroxy-6-oxo-24-epicampestanol (24) via 22,23-epoxy- and 22,23-bromohydrin intermediates starting with ergosterol is reported. The structures of the new brassinosteroids were determined especially by X-ray analysis of intennediate bromohydrins.The synthesis of 24-epicathasterone, 22-deoxy-24-epiteasterone and 24-hydroxy-6-oxo-24-epicampestanol via 22,23-epoxy- and 22,23-bromohydrin intermediates starting with ergosterol is reported. The structures of the new brassinosteroids were determined especially by X-ray analysis of intermediate bromohydrins.