We report the synthesis of α‐trifluoromethylacrylates from α‐trifluoroborylacrylates via a stereoretentive radical trifluoromethylation with inexpensive reagents NaSO2CF3 and TBHP at room temperature. Under these conditions, a wide substrate scope afforded the (E)‐diastereomer exclusively in moderate to good yield. The utility of the reaction products is demonstrated in the synthesis of phenyl‐4H‐pyran
我们报告了在室温下通过廉价的NaSO 2 CF 3和
TBHP试剂通过立体保持性自由基三
氟甲基化反应从α-三
氟硼基
丙烯酸酯合成α-三
氟甲基丙烯酸酯。在这些条件下,较宽的底物范围仅能以中等至良好的产率提供(E)-非对映异构体。该反应产物的效用在苯基-4 H-
吡喃的合成中得到了证明,苯基-4 H-
吡喃是一种强效且选择性的IKCa通道阻滞剂。