New route to herbertanes via a Suzuki cross-coupling reaction: synthesis of herbertenediol
作者:Antonio Abad、Consuelo Agulló、Ana C Cuñat、Diego Jiménez、Remedios H Perni
DOI:10.1016/s0040-4020(01)00987-5
日期:2001.11
The synthesis of herbertenediol, a relevant member of the herbertane-type sesquiterpene family, is described. The synthesis is based on a new general approach to this group of sesquiterpenes where the herbertane skeleton is constructed using a Suzuki cross-coupling reaction and a [2,3]-sigmatropic Still–Wittig rearrangement as key synthetic steps.
The Rearrangement of 2,3-Epoxysulfonates and Its Application to Natural Products Syntheses: Formal Synthesis of (−)-Aphanorphine and Total Syntheses of (−)-α-Herbertenol and (−)-Herbertenediol
作者:Yasuyuki Kita、Junko Futamura、Yusuke Ohba、Yoshinari Sawama、Jnaneshwara K. Ganesh、Hiromichi Fujioka
DOI:10.1021/jo034573g
日期:2003.7.1
The Lewis acid treatment of 2,3-epoxysulfonates with 2,3-dialkyl substituents or 2-alkyl-3-aryl substituents produced the rearrangementproducts via C3-cleavage of the oxirane ring in high yields. On the other hand, 2-aryl-3-alkyl-2,3-epoxysulfonates produced the products via C2-cleavage of the oxirane ring. The sulfonyloxy groups of the alpha-sulfonyloxy ketones, having a chiral benzylic quaternary