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The synthesis of xanthones via a multicomponent reaction of isocyanides is described for the first time. In this one‐pot process, a tandem [4+1] plus [4+2] cycloaddition leads to polysubstituted 4‐aminoxanthones in excellent to quantitative yields at room temperature in a non‐catalyzed reaction. magnified image
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Bornadiego et al. (2014) studied this question.
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