Complex Carbocyclic Skeletons from Aryl Ketones through a Three‐Photon Cascade Reaction
作者:Line Næsborg、Christian Jandl、Andreas Zech、Thorsten Bach
DOI:10.1002/anie.201915731
日期:2020.3.27
Starting from readily available 7-substituted 1-indanones, products with a tetracyclo[5.3.1.01,7 04,11 ]undec-2-ene skeleton were obtained upon irradiation at λ=350 nm (eight examples, 49-67 % yield). The assembly of the structurally complex carbon framework proceeds in a three-photon process comprising an ortho photocycloaddition, a disrotatory [4π] photocyclization, and a di-π-methane rearrangement
从容易获得的7-取代的1-茚满酮开始,在λ= 350 nm照射后获得具有四环[5.3.1.01,7 04,11]十一碳-2-烯骨架的产物(8个实例,产率49-67%) 。结构复杂的碳骨架的组装以三光子过程进行,该过程包括邻位光环加成,可旋转的[4π]光环化和二π-甲烷重排。起始原料的扁平芳烃核通过三个方向的出口向量转化为官能化的多环烃。探索了在中央环丙烷环上的开环反应,其使得能够制备三环[5.3.1.04,11]十一碳烯和三环[6.2.1.01,5]十一碳烯。