Strychnos 1990 - 2004 - Crops for the Future

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Author Title Year Source title Reference Kuehne, M. E., F. Xu and C. S. Brook Syntheses of strychnos-type and aspidospermatan-type alkaloids .6. Total synthese 1994 Journal of Organic Chemistry 59(25): 7803-7806 Abstract 19-Oxodihydroakuammicine was obtained in a three-pot sequence, in 25% overall yield based on a new condensation-sigmatropic rearrangement sequence. Reductions-and quaternization reactions f u r n i s h e d t h e t i t l e c o m p o u n d s . Author Title Year Source title Reference Mukherjee, R., B. C. Das, P. A. Keifer and J. N. Shoolery Structure and stereochemistry of divarine - another new bisindole alkaloid from St 1994 Heterocycles 38(9): 1965-1970 Abstract The complete stereostructure of divarine, a new bisindole alkaloid from Strychnos divaricans Ducke., has been determined mainly by the use of one- and two-dimensional nmr techniques.
Author Title Year Source title Reference Prins, H. and J. A. Maghembe Germination studies on seed of fruit-trees indigenous to Malawi 1994 Forest Ecology and Management 64(2-3): 111-125 Abstract Indigenous fruit trees play an important role in rural areas in Malawi. However, information on propagation techniques for these species is scantily available. Freshly obtained seed of 16 indigenous fruit trees and one exotic species were therefore collected and tested for germination after applying eight different seed pretreatments. The pretreatments included direct sowing, washing, soaking, hot water treatment and different degrees of removal of the seedcoat. The objective was to find a simple technique to germinate seed of each species so that such a technique can be applied under village conditions in Malawi. - More than 80% germination was achieved for Bridelia cathartica, Bridelia micrantha, Diospyros mespiliformis, Parkia filicoidea, Piliostigma thonningii, Strychnos spinosa, Syzygium cordatum, Tamarindus indica, Uapaca kirkiana, Ziziphus abyssinica and Ziziphus mauritiana by simply cleaning and soaking the seeds. Quicker germination could be achieved by partial removal of the seedcoat for some species. Azanza garckeana and Parinari curatellifolia, however, required partial or complete removal of the seedcoat to achieve some germination. Flacourtia indica and Parinari curatellifolia had very poor germination of 20% and 1 7 % , r e s p e c t i v e l y . Author Title Year Source title Reference Quetinleclercq, J., G. Dive, C. Delaude, R. Warin, R. Bassleer and L. Angenot 2,7-dihydroxyapogeissoschizine from root bark of Strychnos gossweileri 1994 Phytochemistry 35(2): 533-536 Abstract In this paper, we describe the isolation and structural determination of 2,7- dihydroxyapogeissoschizine, a new alkaloid from the root bark of Strychnos gossweileri. Elucidation of its structure is based mainly on 1D and 2D NMR studies; its conformation was optimized by energy minimization. According to a preliminary test, this substance shows low toxicity to B16 melanoma cells, but not for non-cancer 3T3 fibroblasts cultured in vitro.
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