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Three new taxane diterpenoids from the seeds of Taxus yunnanensis Cheng et L. K. Fu and T. cuspidata Sieb et Zucc

Author:
Qing-wen Shi   Takayuki Oritani   Takeyoshi Sugiyama   Tohru Horiguchi   Ryo Murakami   Ding Zhao   Takashi Oritani  


Journal:
Tetrahedron


Issue Date:
1999


Abstract(summary):

Chemical examination of the seeds of the Chinese yew, Taxus yunnanensis Cheng et L. K. Fu and Japanese yew, T. cuspidata Sieb et Zucc resulted in the isolation of three new and rare rearranged abeotaxane type of diterpenoids in addition to several known compounds. The structures of the new taxoids have been established as 9alpha, 13alpha-diacetoxy-11(15fwdarw1)abeotaxa-4(20), 11-diene-5alpha, 10beta, 15-triol (1), 9alpha, 13alpha-diacetoxy-10beta-benzoyloxy-5alpha-(3'-dimethylamino-3'-phenyl)- propionyloxy-11(15fwdarw1)abeotaxa-4(20), 11-diene-15-ol (2), and 2alpha,7beta,13alpha-triacetoxy-10beta-hydroxy-5alpha-(3'-dimethylamino- 3'-phenyl)-propionyloxy-2(3fwdarw20)-abeo-taxa-9-one (3) by a study of their spectral data.


Page:
8365-8376


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