STUDIES ON TERPENOIDS AND STEROIDS .25. COMPLETE H-1-NMR AND C-13-NMR SPECTRAL ASSIGNMENTS OF SALACIQUINONE, A NEW 7-OXO-QUINONEMETHIDE DINORTRITERPENOID

被引：20
|
作者：
TEZUKA, Y
KIKUCHI, T
DHANABALASINGHAM, B
KARUNARATNE, V
GUNATILAKA, AAL
机构：
[1] TOYAMA MED & PHARMACEUT UNIV,RES INST WAKAN YAKU,TOYAMA 93001,JAPAN
[2] UNIV PERADENIYA,DEPT CHEM,PERADENIYA,SRI LANKA
来源：
JOURNAL OF NATURAL PRODUCTS | 1994年 / 57卷 / 02期
关键词：
D O I：
10.1021/np50104a012
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
A new 7-oxo-quinonemethide dinortriterpenoid, salaciquinone [1], and a known quinonemethide dinortriterpenoid, isoiguesterin [3], were isolated from the toot bark of Salacia reticulata var. beta-diandra (Celastraceae). The structure elucidation of salaciquinone was based on derailed 2D and nOe-difference nmr spectroscopy, leading to the complete assignment of the H-1- and C-13-nmr spectra and revision of some H-1-nmr spectral assignments made previously for the related 7-oxo-quinonemethide nortriterpenoid, dispermoquinone [2]. Complete H-1- and C-13-nmr spectral assignments of isoiguesterin were also made, also leading to revision of some C-13-nmr assignments previously made for this compound.
引用
收藏
页码：270 / 276
页数：7
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