A novel and efficient ytterbium promoted reductive cyclisation dimerization of α-bromo-oxime ethers affording 2,4-diarylpyrroles with high regioselectivity has been developed. Compared with the reported synthesis methods, the method has the following advantages: readily available and safe starting material, one-pot single step operation and mild and neutral reaction conditions.
已经开发出新颖且有效的promote促进了α-
溴肟醚的还原环化二聚化,其提供了具有高区域选择性的2,4-二芳基
吡咯。与报道的合成方法相比,该方法具有以下优点:容易获得和安全的起始原料,一锅单步操作以及温和和中性的反应条件。