Formal syntheses of heliannuols A and D, allelochemicals from Helianthus Annus
作者:Kazi Tuhina、Dipal R. Bhowmik、Ramanathapuram V. Venkateswaran
DOI:10.1039/b200103a
日期:2002.3.7
A synthesis of heliannuol A 1 is described involving hydrogenolysis of the cyclopropane fused benzoxepane compound 23 to generate the benzoxocane ring system of 1 and a fragmentation of methyl ether 25 furnished 4-methoxycurcuphenol 29, an advanced intermediate to heliannuol D 4.
介绍了氦壬醇 A 1 的合成过程,包括环丙烷融合苯并氧杂环庚烷化合物 23 的氢解,生成 1 的苯并氧杂环庚烷环系统,甲基醚 25 断裂生成 4-甲氧基莪术酚 29,这是氦壬醇 D 4 的高级中间体。
Synthesis of heliannuols A and K, allelochemicals from cultivar sunflowers and the marine metabolite helianane, unusual sesquiterpenes containing a benzoxocane ring system
作者:Subrata Ghosh、Kazi Tuhina、Dipal R. Bhowmik、Ramanathapuram V. Venkateswaran
DOI:10.1016/j.tet.2006.11.014
日期:2007.1
Synthesis of the allelochemicals heliannuols A and K, and the sesquiterpene helianane is described. A regioselective cleavage of a benzo-fused oxabicyclo(5.1.0)octane system under hydrogenation as well as radical induced condition was developed to generate the basic benzoxocane ring system of these unusual sesquiterpenes.