Benzeochromenes,also named as naphthopyrans,are widely found in natural products,bioactive molecules and organic functional materials.A simple and efficient strategy for the synthesis of benzeochromenes with propargyl alcohols andβ-naphthols under mild conditions was developed,and a series of benzeochromenes were prepared in excellent yields.This protocol has the advantages of broad scope,functional group diversity and mild conditions with H2O as the only byproduct.Moreover,ease of operation and gram-scale preparation portend the practical application.
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