Different aromatic aldehydes and cinnamaldehyde undergo cross-aldol condensation with chroman-4-ones and1-thiochroman-4-ones in the presence of amberlyst-15 under microwave irradiation in solvent free condition to afford rapidly the correspondingE-3-arylidene andE-3-cinnamylidene derivatives, respectively, in high yield. This process is simple, efficient and environmentally benign.
不同的芳香醛和
肉桂醛在无溶剂条件下在微波辐射下与
4-羟基
香豆素和1-
硫代-
4-羟基
香豆素在
琥珀酸树脂-15的存在下发生交叉醛醇缩合反应,迅速生成相应的
E-3-芳基亚醛和
E-3-
肉桂醇亚醛衍
生物,收率高。这一过程简单、高效且环保。