Multi‐Photocatalyst Cascades: Merging Singlet Oxygen Photooxygenations with Photoredox Catalysis for the Synthesis of Alkaloid Frameworks
作者:Dimitris Kalaitzakis、Artemis Bosveli、Kalliopi Sfakianaki、Tamsyn Montagnon、Georgios Vassilikogiannakis
DOI:10.1002/anie.202012379
日期:2021.2.19
substrates into polycyclic alkaloid frameworks or erythrina natural products is described. Each of the sequences developed makes use of photocatalyzed energy transfer processes, which generate singlet oxygen, to set up the substrates for the second photocatalyzed reaction, wherein electron transfer generates carbon‐centered radicals for the cyclizations that give the final complex frameworks. A chemical
描述了将快速简单的呋喃底物迅速转变为多环生物碱骨架或赤藓类天然产物的级联反应的发展。所开发的每个序列都利用光催化的能量转移过程生成单线态氧,为第二次光催化反应设置底物,其中电子转移为环化生成碳中心自由基,从而形成最终的复杂骨架。已经开发出一种化学开关,可以“关闭”一种光催化剂。因此,允许第二种光催化剂接管序列的控制。作为必然结果,这种策略代表了首次有可能在级联反应中使用多种光催化剂,因此,