作者:Doleshwar Niroula、Liam P. Hallada、Snezna Rogelj、Rodolfo Tello-Aburto
DOI:10.1016/j.tet.2016.12.013
日期:2017.1
A total synthesis of the cytotoxic terpenoid hortonone C was accomplished and its absolute stereochemistry confirmed. Intermediate (+)-4 was synthesized using either an asymmetric conjugate addition strategy, or by elaboration of the Hajos-Parrish ketone. Reduction of (+)-4 under dissolving-metal conditions and trapping the enolate intermediate served to control the cis-stereochemistry at the ring
完成了细胞毒性萜类激素C的全合成,并证实了其绝对立体化学。中间体(+)- 4使用不对称共轭加成策略或通过修饰Hajos-Parrish酮合成。在溶解金属条件下还原(+)- 4并捕获烯醇盐中间体可控制环稠合时的顺式-立体化学,并提供扩环所需的甲硅烷基烯醇醚。旋光数据的比较证实了天然激素C的绝对构型为(6 S,7 S,10 S)。