obtain meaningful results. Most interestingly, the products of oxidative addition of aromatic C−X (X=Cl, I) bonds to [Pd(tBuXPhos)] (cat2) have been previously isolated and characterized by X-ray by the Nozaki and Buchwald groups.48 These structures reveal a trans disposition between the phosphorus and halide atoms. Figure 3 Open in figure viewerPowerPoint Calculated pathways (ΔG; in kcal ⋅ mol−1) for the
开发了一种制备(2-芳基烯丙基)芳基砜的一锅法 Pd 催化串联工艺。该策略基于
硼酸、亚
磺酸钠和
乙酸 2-
溴代烯
丙酯的模块化组装。该反应对末端烯烃具有完全区域选择性,生成(2-芳基烯丙基)芳基(或烷基)砜,产率范围为 56% 至 93%。控制实验与 DFT 计算相结合,提出了串联反应的合理反应机制。该方法的实用性已通过不对称氢化对市售药物
阿普司特和几种
天然产物的正式合成得到证明。使用市售的 UbaPHOX
铱络合物,获得了 ee 高达 98% 的手性 β-甲基砜