Development of a Cross‐Conjugated Vinylogous [4+2] Anionic Annulation and Application to the Total Synthesis of Natural Antibiotic (±)‐ABX
作者:Jing‐Kai Huang、Kak‐Shan Shia
DOI:10.1002/anie.201914657
日期:2020.4.16
vinylogous [4+2] anionic annulation has been newly developed, the cascade process of which has a high preference for regiochemical control and chemoselectivity, giving rise to exclusively Michael-type adducts in moderate to high yields (up to 94 %, 35 examples). By making use of this approach as a key operation, the first total synthesis of natural antibiotic ABX, in racemic form, has been successfully
交叉共轭的乙烯基[4 + 2]阴离子环化技术已经得到了新的发展,其级联工艺对区域化学控制和化学选择性具有很高的偏爱,从而以中等至高的收率(高达94%的产率)产生了唯一的迈克尔型加合物。 (35个示例)。通过将该方法用作关键操作,已成功地以简明的7个步骤成功完成了外消旋形式的天然抗生素ABX的首次全合成,总收率约为20%。