Strychnos 1990 - 2004 - Crops for the Future

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Author Title Year Source title Reference Fletcher, R., M. Kizil, C. Lampard, J. A. Murphy and S. J. Roome Tetrathiafulvalene-mediated stereoselective synthesis of the tetracyclic core of asp 1998 Journal of the Chemical Society-Perkin Transactions 1 (15): 2341-2351 Abstract A novel route to advanced synthetic precursors of Aspidosperma alkaloids is described, utilising r a d i c a l - p o l a r c r o s s o v e r r e a c t i o n s . Author Title Year Source title Reference Frederich, M., J. Quetin-Leclercq, R. G. Biala, V. Brandt, J. Penelle, M. Tits and 3 ',4 ',5 ',6 ' tetradehydrolongicaudatine y, an anhydronium base from Strychnos us 1998 Phytochemistry 48(7): 1263-1266 Abstract A new bisindole alkaloid, tetradehydrolongicaudatine Y, has been isolated from the stem bark of Strychnos usambarensis collected from the Ivory Coast. Elucidation of its structure is based mainly on spectroscopic studies and places it among the relatively small collection of zwitterionic indoloquinolizine alkaloids. (C) 1998 Elsevier Science Ltd. Al rights reserved. Author Title Year Source title Reference Frederich, M., M. Tits and L. Angenot Qualitative and quantitative evaluation of bisindole usambarane alkaloids in Stryc 1998 Phytochemical Analysis 9(2): 63-66 Abstract A high performance liquid chromatographic method for the simultaneous determination of bisindole usambarane alkaloids from the roots of Strychnos usambarensis using a diode-array detector is proposed, The system, consisting of a RP-8 Select B column and a linear gradient elution with acetonitrile and acetate buffer allowed the separation of all the alkaloids in 20 min, Usambarensine was found to be the major tertiary alkaloid present in the roots, In order to demonstrate the possibility of quantifying the bisindole alkaloids in crude roots extracts, the quantitative evaluation of 3',4'-dihydrousambarensine, usambarensine and N-b-methylusambarensine was carried out. (C) 1 9 9 8 J o h n W i l e y & S o n s , L t d .
Author Title Year Source title Reference Abstract Frederich, M., M. Tits and L. Angenot Qualitative and quantitative evaluation of bisindole usambarane alkaloids in Stryc 1998 Phytochemical Analysis 9(2): 63-66 - Author Title Year Source title Reference Abstract Gharagozloo, P., M. Miyauchi, B. Birdsall and N. J. M. Birdsall Intramolecular diels-alder reactions of 3-(tetrahydropyridinyl)indoles: Stereoselec 1998 Journal of Organic Chemistry 63(6): 1974-1980 - Author Title Year Source title Reference Hokelek, T., H. Gunduz, S. Patir and N. Uludag Spiro[carbazole-1(2h),2 '-[1,3]dithiolan]-4(3h)-one 1998 Acta Crystallographica Section C Crystal Structure Communications 54(Sep): 1297-1299 Abstract The title compound, C14H13NOS2, consists of a carbazole skeleton and a pentacyclic dithiolane ring bonded at position 1. The heteroatoms in the molecule are responsible for the changes in the b o n d l e n g t h s a n d a n g l e s o f t h e c a r b a z o l e c o r e .
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Strychnos 1990 - 2004 - Crops for the Future

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