Chemical constituents of the combretaceae. Part III. Substituted phenanthrenes, 9,10-dihydrophenanthrenes, and bibenzyls from the heartwood of Combretum psidioides
作者:R. M. Letcher、L. R. M. Nhamo
DOI:10.1039/p19720002941
日期:——
Ten new compounds isolated from the heartwood of Combretum psidioides have been shown to be 7-hydroxy-2,4,6-trimethoxy-, 7-hydroxy-2,3,4,6-tetramethoxy-, 2,7-dihydroxy-3,4,6-trimethoxy-, and 2,6,7-trihydroxy-3,4-dimethoxy-phenanthrene, the 9,10-dihydro-derivatives of these four compounds, and 4′-hydroxy-3,4,5-trimethoxy-and 4,4′-dihydroxy-3,5-dimethoxybibenzyl.
Chemical constituents of the Combretaceae. Part II. Substituted phenanthrenes and 9,10-dihydrophenanthrenes and a substituted bibenzyl from the heartwood of Combretum molle
作者:R. M. Letcher、L. R. M. Nhamo、I. T. Gumiro
DOI:10.1039/p19720000206
日期:——
been isolated from the heartwood of Combretum molle and have been shown both by chemical and spectroscopic methods and by synthesis to be 4,7-dihydroxy-2,3,6-trimethoxyphenanthrene, 4,6,7-trihydroxy-2,3-dimethoxy- and 2,6-dihydroxy-3,4,7-trimethoxy-9,10-dihydrophenanthrene, and 3,4′-dihydroxy-4,5-dimethoxybibenzyl. The relevance of the latter compound to the biogenesis of the phenanthrenes and 9,10-dihydrophenanthrenes
Chemical constituents of the combretaceae. Part I. Substituted phenanthrenes and 9,10-dihydrophenanthrenes from the heartwood of Combretum apiculatum
作者:R. M. Letcher、L. R. M. Nhamo
DOI:10.1039/j39710003070
日期:——
Five new compounds isolated from the heartwood of Combretumapiculatum have been shown by chemical and spectroscopic methods, supported by synthesis, to be 4,7-dihydroxy-2,6-dimethoxy-, 4,7-dihydroxy-2,3,6-trimethoxy-, and 2,6-dihydroxy-3,4,7-trimethoxy-9,10-dihydrophenanthrene, and 2,6-dihydroxy-3,4,7-trimethoxy- and 4,6,7-trihydroxy-2,3-dimethoxyphenanthrene.
Phenanthrenes, dihydrophenanthrenes and bibenzyls from the orchid bulbophyllum vaginatum
作者:Yuan-Wah Leong、Chiang-Cheong Kang、Leslie J. Harrison、Andrew D. Powell
DOI:10.1016/s0031-9422(96)00387-1
日期:1997.1
Two new phenanthrenes (4,9-dimethoxyphenanthrene-2,5-diol and 4,6-dimethoxyphenanthrene-2,3,7-triol) and two new 9,10-dihydrophenanthrenes (4-methoxy-9,10-dihydrophenanthrene-2,3,7-triol and 4,6-dimethoxy-9,10-dihydrophenanthrene-2,3,7-triol), along with six known phenanthrenes, four known 9,10-dihydrophenanthrenes no known bibenzyls and the triterpenoid friedelin were isolated and characterized from
两种新的菲(4,9-二甲氧基菲-2,5-二醇和 4,6-二甲氧基菲-2,3,7-三醇)和两种新的 9,10-二氢菲(4-甲氧基-9,10-二氢菲-2 ,3,7-三醇和 4,6-二甲氧基-9,10-二氢菲-2,3,7-三醇),以及六种已知的菲、四种已知的 9,10-二氢菲(未知联苄)和三萜类弗里德林并以兰花 Bulbophyllum vaginatum 的己烷提取物为特征。这些化合物的结构通过光谱分析确定。