Three new sesquiterpenes named orientalols A, B, and C were isolated from Chinese Alismatis Rhizoma, the dried rhizome of Alisma orientale JUZEPCZUK, together with two known sesquiterpenes, alismol and alismoxide. On the basis of the chemical and physiconhemical evidence, the structures of orientalols A (3), B (4), and C(5) were determined and those of alismol and alismoxide were revised from 1' and 2' to 1 and 2, respectively.
从中国东方藻(Alisma orientale JUZEPCZUK的干燥根茎)中分离出了三种新的倍半萜烯,分别命名为东方酚A、B和C,以及两种已知的倍半萜烯--藻烯醇和藻烯醇。根据化学和物理化学证据,确定了东方酚 A (3)、B (4) 和 C (5)的结构,并将烯丙基酚和烯丙基氧化物的结构分别从 1' 和 2' 修改为 1 和 2。
Bowden, Bruce F.; Coll, John C.; Mitchell, Sarah Jane, Australian Journal of Chemistry, <hi>1980</hi>, vol. 33, # 7, p. 1833 - 1839
作者:Bowden, Bruce F.、Coll, John C.、Mitchell, Sarah Jane
DOI:——
日期:——
Synthesis of Terpenoids Using a Free Radical Fragmentation/Elimination Sequence
作者:Gordon L. Lange、Christine Gottardo、Alexandru Merica
DOI:10.1021/jo990307k
日期:1999.9.1
Total syntheses of the guaiane alismol 8 and the trinor-guaiane dictamnol 18 are reported. In both syntheses the initial [2+2] photoadduct is transformed into an iodo xanthate 14 or a diiodide 27, respectively. In the critical step, the strained bifunctional substrate undergoes a very efficient free radical fragmentation/elimination sequence to give the requisite seven-membered ring with regioselective
Fournew sesquiterpenes, sulfoorientalols a, b, c, and d, having a sulfonic acid function were isolated from Chinese Alismatis Rhizoma. Their structures were determined on the basis of chemical and physicochemical evidence. Sulfoorientalols inhibited the contraction of isolated bladder smooth muscle induced by carbachol.