Direct transformation of coumarins into orange-red emitting rhodols.
Kateryna V VygranenkoYevgen M PoronikManon H E BousquetOlena VakuliukDenis JacqueminDaniel T GrykoPublished in: Chemical communications (Cambridge, England) (2022)
The lactone carbonyl group of coumarin derivatives has been shown to participate in intramolecular Knoevenagel condensations, enabling the unprecedented direct transformation of coumarins into rhodols. The resulting rhodols, possessing two ester groups, have very intense orange-red fluorescence.