New Antifungal Chromenyl Ketones and their Pentacyclic Dimers from<i>Hypericum revolutum</i>VAHL
作者:Laurent A. Décostered、Kurt Hostettmann、Helen Stoeckli-Evans、Jerome D. Msonthi
DOI:10.1002/hlca.19870700705
日期:1987.11.4
Two new 2H-1-benzopyranyl ketones 1 and 2 and three new pyrano[3,2-c: 4,5,6-d′ e′]di[1]benzopyrandiyl diketones 3, 4a/4b, and 5 have been isolated from the leaves and twigs of Hypericum revolutum VAHL (Guttiferae). The structure of 3 (hyperevoline) was established by X-ray analysis as 1,1′-[1,13,13a,13b-tetrahydro-5,8,10-trihydroxy-2,2,6,9,13,13-hexamethyl-2H, 7aH-pyrano[3,2-c:4,5,6-d′e′]di[1]benzopyran-4
两个新的2 ħ -1-苯并吡喃酮1和2和三个新的吡喃并[3,2- Ç:4,5,6- d ' ë ']二[1] benzopyrandiyl二酮3,图4a / 4b中,和5已经分离自金丝桃属植物VAHL(Guttiferae)的叶子和枝杈。X射线分析确定3(高佛碱)的结构为1,1'-[1,13,13a,13b-四氢-5,8,10-三羟基-2,2,6,9,13,13六甲基2 ħ,7α ħ吡喃并[3,2- ç:4,5,6- d ' ë′]二[1]苯并吡喃-4,11-二基]双[2-甲基-1-丙酮]。分离的化合物的结构通过光谱法(UV,IR,EI-MS,1 H-和13 C-NMR)和化学(乙酰化和酸性二聚)方法建立。