Asymmetric Total Syntheses of 8,9‐Seco‐<i>ent</i>‐kaurane Diterpenoids Enabled by an Electrochemical ODI‐[5+2] Cascade
作者:Bingnan Wang、Zhaobo Liu、Zhenzhong Tong、Beiling Gao、Hanfeng Ding
DOI:10.1002/anie.202104410
日期:2021.6.25
An electrochemical ODI-[5+2] cascade reaction was developed which enables the rapid assembly of diversely functionalized bicyclo[3.2.1]octadienones from sensitive ethynylphenols. By combining a directed retro-aldol/aldol process, a [2,3]-sigmatropic rearrangement, and an Al(O-iPr)3-promoted reductive 1,3-transposition, the asymmetric total syntheses of five 8,9-seco-ent-kauranoids—(−)-shikoccin, (
开发了一种电化学 ODI-[5+2] 级联反应,该反应能够从敏感的乙炔基苯酚中快速组装各种功能化的双环 [3.2.1] 辛二烯。通过结合定向逆向醛醇/醛醇过程、[2,3]-σ 重排和 Al(O-iPr) 3 -促进的还原 1,3-转座,五个 8,9-seco 的不对称全合成-ent-kauranoids-(-)-shikoccin、(-)-O-methylshikoccin、(-)-epoxyshikoccin、(+)-O-methylepoxyshikoccin 和 (+)-rabdo-hakusin-已经以简洁有效的方式实现方式。