The cesium carbonate-mediated reaction of 2-bromoallyl sulfones and ortho-hydroxychalcones furnished 3-arylsulfonyl-4H-chromene derivatives in 58–67% yield (18 examples). 2-Bromoallyl sulfones functioned as synthetic surrogates for allenyl sulfones in the reaction.
硫醚烯磺酸2-溴丙烯基和邻羟基茜醌在铯碳酸盐催化下反应,产生了3-芳基磺酰基-4H-色烯衍生物,收率为58-67%(18个例子)。2-溴丙烯基磺酸酯在反应中作为芪烯磺酸酯的合成替代物。