derivatives) than provided by their oligoprenyldiphosphate precursor. This is sometimes the result of an oxidative ring-opening reaction at a terpene-cyclase-derived molecule containing the regular number of Me group equivalents, as observed for picrotoxan sesquiterpenes. In this study a sesquiterpene cyclase from Trichoderma spp. is described that can convert farnesyl diphosphate (FPP) directly via a remarkable
Sesquiterpenes from <i>Lippia integrifolia</i> Essential Oil
作者:Christiane Fricke、Ingo H. Hardt、Wilfried A. König、Daniel Joulain、Julio A. Zygadlo、Carlos A. Guzmàn
DOI:10.1021/np980424v
日期:1999.5.1
Four sesquiterpenes (1-4) with the africanane skeleton [of which only 5-africanene (1) has been previously reported] and the new asteriscane derivative asterisca-3(15),6-diene (5) were isolated from the essentialoil of Lippia integrifolia. A further new compound, african-2(6)-ene (7), was obtained as a semisynthetic product by derivatization of isoafricanol (6). The structures of the new compounds