A facile and efficient method for the synthesis of chromone-containing triarylmethane derivatives a HFIP promoted tandem alkylation/annulation protocol of -hydroxyaryl enaminones with chlorohydrocarbon is described. Employing DCM/HFIP as solvent, the reactions proceed smoothly at room temperature without any transition-metal catalyst, providing a variety of chromone-containing triarylmethanes in moderate to good yields. Moreover, the developed protocol reveals a broad substrate scope and good group tolerance.

中文翻译：

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HFIP促进邻羟基芳基烯胺与氯代烃环化合成含色酮三芳基甲烷

描述了一种简便有效的合成含色酮三芳基甲烷衍生物的方法，该方法采用 HFIP 促进的 羟芳基烯胺酮与氯代烃的串联烷基化/成环方案。使用DCM/HFIP作为溶剂，反应在室温下顺利进行，无需任何过渡金属催化剂，以中等至良好的收率提供了多种含色酮的三芳基甲烷。此外，所开发的协议显示出广泛的底物范围和良好的群体耐受性。