Amberlyst-15: an efficient and reusable catalyst for the Friedel–Crafts reactions of activated arenes and heteroarenes with α-amido sulfones
作者:Santosh T. Kadam、Ponnaboina Thirupathi、Sung Soo Kim
DOI:10.1016/j.tet.2009.10.044
日期:2009.12
The heterogeneous Amberlyst-15 catalyst displays efficient catalytic properties for the Friedel–Crafts reactions between an activatedarenes or heteroarenes and α-amido sulfones. Various α-amido sulfones on treatment with 1,2,4-trimethoxy benzene give the Friedel–Crafts reaction products in very good yield. The reactions with heteroarenes show moderate yield of the product. The catalyst can be easily
Regioselective Arylations of α-Amido Sulfones with Electron-Rich Arenes through Friedel-Crafts Alkylations Catalyzed by Ferric Chloride Hexahydrate: Synthesis of Unsymmetrical and Bis-Symmetrical Triarylmethanes
作者:Ponnaboina Thirupathi、Sung Soo Kim
DOI:10.1002/ejoc.200901186
日期:2010.3
Ferricchloridehexahydrate is a highly efficient catalyst for the regioselectivearylation of α-amidosulfones. The products undergo further Friedel-Craftsalkylations with heteroaromatic or electron-richarenes to afford unsymmetrical or bis-symmetricaltriarylmethanes.