Phytochemical studies on Stemona burkillii prain: two new dihydrostemofoline alkaloids |
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| Authors: | Mungkornasawakul Pitchaya Pyne Stephen G Jatisatienr Araya Lie Wilford Ung Alison T Issakul Kritchaya Sawatwanich Auntika Supyen Damrat Jatisatienr Chaiwat |
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| Institution: | Department of Chemistry, University of Wollongong, New South Wales, 2522, Australia. |
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| Abstract: | Two new dihydrostemofoline alkaloids, 11(S),12(R)-dihydrostemofoline (3) and stemoburkilline (4), along with stemofoline (1) and 2'-hydroxystemofoline (2) have been isolated from a root extract of Stemona burkillii Prain. The structure and relative configuration of 3 have been determined via spectroscopic data and from comparison with synthetic 11(S),12(S)-dihydrostemofoline (5). The configuration of the exo-cyclic alkene group in 4 is tentively assigned as E on the basis of mechanistic considerations. |
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