The inexpensive Br2 can serve as a novel Lewis acid catalyst for Friedel–Crafts alkylation of indoles with α,β-unsaturatedketones. Under the catalysis of only 3 mol % of Br2, this Michael addition proceeded smoothly with high efficiency and broad substrate scope. Moreover, theoretical calculations suggested that Br2 possesses only the modest power to activate chalcones and is inferior to most tested
Magnetic polyoxometalates (POMs) are obtained by a simple sonication between functionalized magnetic nanoparticles and polyoxometalates. This material can be used not only as a highly active acid catalyst, but also as a catalyst support for chiral amines.
Kan war, Deepika; Rani, Rashmi; Agarwal, Jyoti, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2010, vol. 49, # 9, p. 1290 - 1299
作者:Kan war, Deepika、Rani, Rashmi、Agarwal, Jyoti、Peddinti, Rama Krishna