| Structure Identification: |
| Yao Xue Xue Bao. 2003 Dec;38(12):919-23. | | Synthesis and antitumor activity of the derivatives of cephalotaxine and drupacine.[Pubmed: 15040085] | To make full use of cephalotaxus plant resources and search for antitumor agents with higher activities and lower side effects.
METHODS AND RESULTS:
The C3 hydroxy groups of the cephlotaxine and Drupacine were acylated by taxol side chain and its isomers to give a series of derivatives of cephlotaxine and Drupacine. Six novel alkaloid esters were designed and synthesized. The pharmacological screening results showed that VIIIa, VIIIb, IXa and IXc exhibited significant activities on KB, HCT and Bel in vitro.
CONCLUSIONS:
Novel alkaloid esters are worthy to be intensively studied. | | 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.
CONCLUSIONS:
The recovery of each alkaloid was more than 90%. The structures of the six alkaloids were identified by electrospray ionization mass spectrum (ESI-MS) and (1)H and (13)C NMR. |
|
Cell. 2018 Jan 11;172(1-2):249-261.e12. doi: 10.1016/j.cell.2017.12.019.IF=36.216(2019)
Cell Metab. 2020 Mar 3;31(3):534-548.e5. doi: 10.1016/j.cmet.2020.01.002.IF=22.415(2019)
Mol Cell. 2017 Nov 16;68(4):673-685.e6. doi: 10.1016/j.molcel.2017.10.022.IF=14.548(2019)
ACS Nano. 2018 Apr 24;12(4): 3385-3396. doi: 10.1021/acsnano.7b08969.IF=13.903(2019)
Nature Plants. 2016 Dec 22;3: 16206. doi: 10.1038/nplants.2016.205.IF=13.297(2019)
Sci Adv. 2018 Oct 24;4(10): eaat6994. doi: 10.1126/sciadv.aat6994.IF=12.804(2019)