Samarium Triflate-Catalyzed Halogen-Promoted Friedel−Crafts Alkylation with Alkenes
作者:Saumen Hajra、Biswajit Maji、Sukanta Bar
DOI:10.1021/ol070813t
日期:2007.7.1
A versatile and efficient halogen-promoted highlyregio- and stereoselective Friedel-Crafts (F-C) alkylation with alkenes has been developed with use of easily available and inexpensive NBS or I2 as the efficient halogen sources. Lewisacids, in particular metal triflates, are found to be effective catalysts for this halogen-promoted F-C alkylation. Among these, Sm(OTf)3 was the best catalyst. Electron-rich