作者:Harriet Swinson、Alexis Perry
DOI:10.1016/j.tet.2020.131219
日期:2020.6
A catalyst-free, three-component alkylation-condensation cascade for spiropyran synthesis has been developed, using readily available building blocks (indoles, alkyl halides, salicylaldehydes) and environmentally benign solvents (water, ethanol). A cascade approach enables this sequence to proceed under mild conditions which, in turn, promote broad substrate tolerance and operational simplicity. Consequently
已经开发出了无催化剂的螺吡喃合成三组分烷基化-缩合级联反应,使用容易获得的结构单元(吲哚,烷基卤化物,水杨醛)和环境友好的溶剂(水,乙醇)。级联方法使该序列可以在温和的条件下进行,从而促进广泛的底物耐受性和操作简便性。因此,我们已经证明了该方法在合成25种结构多样的螺吡喃中的效用,并在整个螺吡喃框架中并以多克规模整合了有用的功能。