Enantioselective synthesis of the bioactive flavanones lonchocarpol A and 6-(1,1-dimethylallyl)naringenin by catalytic asymmetric transfer hydrogenation
作者:Morris Witt、Peter Metz
DOI:10.1016/j.tet.2023.133719
日期:2023.12
Practical enantioselective syntheses of the natural products lonchocarpol A and 6-(1,1-dimethylallyl)naringenin as well as their optical antipodes are reported. A rhodium-catalyzed asymmetric transfer hydrogenation of readily available racemic substrates with virtually complete kinetic resolution served as the key step. Solvent-controlled, clay-catalyzed [1,3] or [3,3] shifts of prenyl aryl ethers
报道了天然产物 lonchocarpol A 和 6-(1,1-二甲基烯丙基)柚皮素及其光学对映体的实际对映选择性合成。关键步骤是对容易获得的外消旋底物进行铑催化的不对称转移氢化,该反应具有几乎完全的动力学分辨率。使用溶剂控制的、粘土催化的异戊二烯基芳基醚的[1,3]或[3,3]位移来安装目标黄烷酮的C-6异戊二烯基或1,1-二甲基烯丙基取代基。