Facile synthesis of dihydrochalcones via the AlCl3-promoted tandem Friedel–Crafts acylation and alkylation of arenes with 2-alkenoyl chlorides
作者:Yang Zhou、Xinyao Li、Shili Hou、Jiaxi Xu
DOI:10.1016/j.molcata.2012.09.005
日期:2012.12
Tandem Friedel–Crafts acylation and alkylation of arenes with 2-alkenoyl chlorides were investigated under the catalysis of Lewis acids. The cascade reaction affords dihydrochalcones in good yields accompanying 1-indanone derivatives in some cases, in the presence of anhydrous aluminum chloride. The scope, limitation, and mechanism of the tandem reaction were also explored. The intermolecular Friedel–Crafts
functionalized indanones that structurally resemble biologically active pterosines. Nanosecond laserflashphotolysis and quantum-chemical calculations based on density functional theory provided evidence that this photochemicaltransformation proceeds primarily via a photoenolization mechanism. Our study revealed considerable complexity of the mechanism and that structural modifications can significantly