A novel method for chemoselective difunctionalization of activated alkynes for synthesizing 3-alkylated spiro[4,5]-trienones, thiaspiro[4,5]-trienones and spirolactams has been uncovered using photoredox catalysis under visible light conditions. The rarely used tricarbonyl compounds in photoredox catalysis were used as the alkylating source. A remarkable functional group tolerance was observed, and
利用可见光条件下的光氧化还原催化,发现了一种用于活化
炔烃化学选择性双官能团合成3-烷基化螺[4,5]-
三烯酮,
硫杂螺[4,5]-
三烯酮和螺内酰胺的新方法。在光氧化还原催化中很少使用的三羰基化合物用作烷基化源。观察到显着的官能团耐受性,并且通过将三羰基螺内酰胺转化成其相应的单羰基化产物展示了该方法的应用,这是传统方法难以获得的。