We describe a novel and simple method for the regiospecific synthesis of functionalized trifluoromethyl- and perfluoroalkyl-containing 4H-chromen-4-ones via the cyclization of substituted 3-aryloxy-3-perfluoroalkylpropenoic acids. The procedures give the final products in high yields, without any need for chromatographic purification, and no side products.
我们介绍了一种新颖而简单的方法,通过取代的 3-aryloxy-3-perfluoroalkylpropenoic acids 环化反应,按区域特异性合成含功能化三
氟甲基和
全氟烷基的 4H-chromen-4-ones 。这些步骤可以得到高产率的最终产品,无需色谱纯化,也没有副产品。