| Structure Identification: |
| J Chromatogr A. 2009 May 29;1216(22):4663-7. | | Completed preparative separation of alkaloids from Cephaltaxus fortunine by step-pH-gradient high-speed counter-current chromatography.[Pubmed: 19393155] | Cephalotaxine-type alkaloids are the anti-cancer components in twigs, leaves, roots and seeds of Cephalotaxus fortunine. It is very important to use the limited resource by finding an efficient purification technology of the alkaloids.
METHODS AND RESULTS:
Separation of cephalotaxine-type alkaloids in Cephalotaxus fortunine by step-pH-gradient high-speed counter-current chromatography (step-pH-gradient HSCCC) was studied in this paper. The step-pH-gradient HSCCC was performed on a HSCCC instrument equipped with a 400-mL column, using the upper phase of ethyl acetate-n-hexane-water, with added 0.01% trifluoroacetic acid (TFA) as stationary phase, and the lower phase of ethyl acetate-n-hexane-water, with added 2% NH(4)OH, 0.2% NH(4)OH and 0.05% TFA as mobile phase. For each separation, 800mg of extract of cephalotaxine-type alkaloids was separated to yield 9.3mg of drupacine, 15.9mg of Wilsonine, 130.4mg of cephalotaxine, 64.8mg of epi-Wilsonine, 12.8mg of fortunine and 35.6mg of acetylcephalotaxine with purities 81.2%, 85.7%, 95.3%, 97.5%, 89.1% and 96.2%, respectively. The recovery of each alkaloid was more than 90%.
CONCLUSIONS:
The structures of the six alkaloids were identified by electrospray ionization mass spectrum (ESI-MS) and (1)H and (13)C NMR. | | Phytochemistry,1983,22(1):251–253. | | Fortuneine, a homoerythrina alkaloid from cephalotaxus fortunei.[Reference: WebLink] |
METHODS AND RESULTS:
Examination of the weakly basic fraction of the twigs and leaves of Cephalotaxus fortunei, a plant native to China, has resulted in the isolation and characterization of epiWilsonine, Wilsonine and a new alkaloid named fortuneine. The structure of fortuneine was deduced by spectral and chemical means. In addition, epifortuneine was prepared and spectral data collected. |
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