Visible-light synthesis of 4-substituted-chroman-2-ones and 2-substituted-chroman-4-ones <i>via</i> doubly decarboxylative Giese reaction
作者:Marek Moczulski、Ewelina Kowalska、Elżbieta Kuśmierek、Łukasz Albrecht、Anna Albrecht
DOI:10.1039/d1ra05914a
日期:——
Doubly decarboxylative, photoredox synthesis of 4-substituted-chroman-2-ones and 2-substituted-chroman-4-ones is described. The reaction involves two independent decarboxylation processes: the first one initiating the cycle and the second completing the process. Visible light, photoredox catalyst, base, anhydrous solvent and inert atmosphere constitute the key parameters for the success of the developed
描述了 4-取代-chroman-2-ones 和 2-取代-chroman-4-ones 的双脱羧、光氧化还原合成。该反应涉及两个独立的脱羧过程:第一个启动循环,第二个完成该过程。可见光、光氧化还原催化剂、碱、无水溶剂和惰性气氛构成了开发转化成功的关键参数。该协议证明适用于香豆素-3-羧酸和色酮-3-羧酸以及作为相应烷基自由基前体的N- (酰氧基) 邻苯二甲酰亚胺。