@Article{Liu2020, author="Qiang Liu and Weibang Lu and Guanqun Xie and Xiaoxia Wang", title="Metal-free synthesis of phosphinoylchroman-4-ones via phosphinoylation/cyclization cascade mediated by K2S2O8", journal="Beilstein Archives", year="2020", issn="", doi="10.3762/bxiv.2020.71.v1", copyright="Liu et al.; licensee Beilstein-Institut.", }