A variety of chroman-4-ones bearing phosphine oxide motifs were conveniently synthesized from readily available diphenylphosphine oxides and alkenyl aldehydes via a metal-free tandem phosphinoylation/cyclization protocol. The reaction utilizes K₂S₂O₈ as oxidant and proceeds in DMSO/H₂O at environmentally benign conditions with a broad substrate scope and afforded the title compounds in moderate yields.

中文翻译：

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通过由K2S2O8介导的自由基膦酰基化环化级联反应，实现无金属合成膦酰基苯并二氢吡喃-4-酮。

通过无金属的串联膦酰基化/环化方案，由容易获得的二苯基膦氧化物和烯基醛方便地合成了多种带有氧化膦基序的苯并二氢吡喃-4-酮。该反应利用K ₂ S ₂ O ₈作为氧化剂，并在DMSO / H ₂ O中在环境温和的条件下进行，具有宽的底物范围，并以中等收率得到标题化合物。