AgNO₃-catalyzed direct C_sp2-H radical phosphorylation of coumarins with H-phosphites to afford selective coumarin-3-yl phosphonate in moderate to good yields is described. This method can be also applied to the phosphorylation of quinolinones.

中文翻译：

---

银催化香豆素的Csp2-H自由基直接磷酸化H-亚磷酸酯

描述了AgNO ₃催化香豆素与H-亚磷酸酯的直接C _sp2- H自由基磷酸化，以中等至良好的产率提供选择性香豆素-3-基膦酸酯。该方法也可以应用于喹啉酮的磷酸化。